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wt/json:develop wt/json:claude/3-13-0-benchmark-blog-32681e wt/json:claude/perf-iterator-object-first wt/json:claude/3-13-0-perf-blog-a3ba5b wt/json:claude/perf-swar-reduced-form wt/json:claude/perf-contiguous-parser wt/json:claude/perf-iterator-ranges wt/json:gh-pages wt/json:dependabot/pip/cmake/requirements/reuse-6.3.0 wt/json:claude/json-view-docs-split-48c8e0 wt/json:fix/view-diagnostics-not-found wt/json:fix/json-view-removed-value-range wt/json:claude/fix-issue-3989-db7e45 wt/json:ci/windows-macos-sets wt/json:ci/tiers wt/json:ci/path-filters wt/json:pin-ci-dependencies wt/json:claude/test-compilation-speed-993125 wt/json:claude/todo-191-plan-508110 wt/json:master
wt/json:v3.12.0 wt/json:v3.11.3 wt/json:v3.11.2 wt/json:v3.11.1 wt/json:v3.11.0 wt/json:v3.10.5 wt/json:v3.10.4 wt/json:v3.10.3 wt/json:v3.10.2 wt/json:v3.10.1 wt/json:v3.10.0 wt/json:v3.9.1 wt/json:v3.9.0 wt/json:v3.8.0 wt/json:v3.7.3 wt/json:v3.7.2 wt/json:v3.7.1 wt/json:v3.7.0 wt/json:v3.6.1 wt/json:3.6.1 wt/json:v3.6.0 wt/json:v3.5.0 wt/json:v3.4.0 wt/json:v3.3.0 wt/json:3.3.0 wt/json:v3.2.0 wt/json:3.2.0 wt/json:v3.1.2 wt/json:3.1.2 wt/json:v3.1.1 wt/json:v3.1.0 wt/json:3.1.0 wt/json:v3.0.1 wt/json:3.0.1 wt/json:v3.0.0 wt/json:3.0.0 wt/json:v2.1.1 wt/json:2.1.1 wt/json:v2.1.0 wt/json:2.1.0 wt/json:v2.0.10 wt/json:2.0.10 wt/json:v2.0.9 wt/json:2.0.9 wt/json:v2.0.8 wt/json:2.0.8 wt/json:v2.0.7 wt/json:v2.0.6 wt/json:v2.0.5 wt/json:v2.0.4 wt/json:v2.0.3 wt/json:v2.0.2 wt/json:v2.0.1 wt/json:v2.0.0 wt/json:v1.1.0 wt/json:v1.0.0 wt/json:v1.0.0-rc1
..
compare: wt/json:claude/3-13-0-benchmark-blog-32681e
wt/json:claude/3-13-0-benchmark-blog-32681e wt/json:claude/perf-iterator-object-first wt/json:claude/3-13-0-perf-blog-a3ba5b wt/json:claude/perf-swar-reduced-form wt/json:claude/perf-contiguous-parser wt/json:claude/perf-iterator-ranges wt/json:develop wt/json:gh-pages wt/json:dependabot/pip/cmake/requirements/reuse-6.3.0 wt/json:claude/json-view-docs-split-48c8e0 wt/json:fix/view-diagnostics-not-found wt/json:fix/json-view-removed-value-range wt/json:claude/fix-issue-3989-db7e45 wt/json:ci/windows-macos-sets wt/json:ci/tiers wt/json:ci/path-filters wt/json:pin-ci-dependencies wt/json:claude/test-compilation-speed-993125 wt/json:claude/todo-191-plan-508110 wt/json:master
wt/json:v3.12.0 wt/json:v3.11.3 wt/json:v3.11.2 wt/json:v3.11.1 wt/json:v3.11.0 wt/json:v3.10.5 wt/json:v3.10.4 wt/json:v3.10.3 wt/json:v3.10.2 wt/json:v3.10.1 wt/json:v3.10.0 wt/json:v3.9.1 wt/json:v3.9.0 wt/json:v3.8.0 wt/json:v3.7.3 wt/json:v3.7.2 wt/json:v3.7.1 wt/json:v3.7.0 wt/json:v3.6.1 wt/json:3.6.1 wt/json:v3.6.0 wt/json:v3.5.0 wt/json:v3.4.0 wt/json:v3.3.0 wt/json:3.3.0 wt/json:v3.2.0 wt/json:3.2.0 wt/json:v3.1.2 wt/json:3.1.2 wt/json:v3.1.1 wt/json:v3.1.0 wt/json:3.1.0 wt/json:v3.0.1 wt/json:3.0.1 wt/json:v3.0.0 wt/json:3.0.0 wt/json:v2.1.1 wt/json:2.1.1 wt/json:v2.1.0 wt/json:2.1.0 wt/json:v2.0.10 wt/json:2.0.10 wt/json:v2.0.9 wt/json:2.0.9 wt/json:v2.0.8 wt/json:2.0.8 wt/json:v2.0.7 wt/json:v2.0.6 wt/json:v2.0.5 wt/json:v2.0.4 wt/json:v2.0.3 wt/json:v2.0.2 wt/json:v2.0.1 wt/json:v2.0.0 wt/json:v1.1.0 wt/json:v1.0.0 wt/json:v1.0.0-rc1
45 Commits
fix/json-view-removed-value-range .. claude/3-13-0-benchmark-blog-32681e
Author SHA1 Message Date
Niels Lohmann f650d5c6ee docs: blog post: remeasure on develop with #6029, #6031, #6033 and #6039 
Rerun on develop 7fc8312c64 with the open pull requests #6029, #6031,
#6033 and #6039 merged, measured on November 7: the suite (median of 12
runs, now 3.3x), the timeline (358 commits, #6031 shown as a pending
step on the candidate, #6028 labeled, a tick for November), the compile
times, the stream gap, the allocator check and the comparison on the
Mac and on x86-64, including the held-out files.

The comparison now leaves out the "copy untimed" variants, as the post
describes, and the held-out chart no longer counts json::accept() as
another library. Appendix D, the Intel column of Appendix B and the
GCC 16/Clang 23 check on the Mac are still from November 3.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-08 08:39:32 +01:00
Niels Lohmann 10aa3a5d82 docs: blog post: describe the performance work of #6020, #6028-#6031 and #6033 
Theme 1 gets the iterator pairs of std::string and std::vector, a new
subsection on the fused contiguous parser after yyjson's reader, and the
FILE buffer window after gnulib's freadptr(). Theme 2 shows the reduced
SWAR test and the (c ^ 2) < 33 vector compare. Themes 4 and 6 get the
binary strings without a zero fill and the 64 KiB window of the vector
sink. Appendices H and J list the new pull requests and their checks.

The numbers of the suite, the timeline, the comparison and the compile
times are not remeasured yet.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-07 15:38:19 +01:00
Niels Lohmann d3d82849e2 Merge branch 'develop' into claude/3-13-0-perf-blog-a3ba5b 
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-07 14:55:50 +01:00
Niels Lohmann 9593feabf3 docs: blog post: name every user of the depth counter and every input the document copies 
The "Bounded recursion" paragraph said only copying and equality for custom
containers use the thread_local counter. Converting from another basic_json
specialization and the ordering comparisons use it too; equality for the
standard containers passes the depth instead.

The "Strings stay in the input" bullet named only parse_copy() and an rvalue
std::string as owning inputs. Streams, FILE* and other input that is not one
contiguous block of bytes are read into an owned buffer as well.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-07 14:54:11 +01:00
Niels Lohmann 7fc8312c64 Fix ci_test_clang_sanitizer: build the CBOR test string from bytes (#6037) 2026-11-07 14:27:52 +01:00
Niels LohmannandClaude Sonnet 5.5 18138227dc Scan the buffer of a FILE in bulk with glibc and the Apple C library (#6030) 
* Scan the buffer of a FILE in bulk with glibc and the Apple C library

Parsing from a FILE* still read one character at a time through
getc_unlocked(), while a std::istream has its get area scanned in bulk.
file_input_adapter now offers the lexer the same kind of window into the
buffer of the FILE: it reads the fields that the C library's own
getc_unlocked() macro reads (glibc: _IO_read_ptr and _IO_read_end; Apple:
_p and _r) and consumes exactly the characters getc_unlocked() would
return, so the file is left where it was left before. The part of the
current token in a buffer that is about to be refilled is kept for error
messages, as for streams. The window needs the file locked for the whole
parse, so JSON_DISABLE_UNLOCKED_FILE_IO and MemorySanitizer builds turn it
off; uClibc, which defines __GLIBC__ but has other fields, does not get it.

parse() from a FILE* gets 2.0-2.6x as fast on an Apple M1 Max and 1.7-2.2x
on x86-64 (glibc, GCC 15 and Clang 21), accept() 2.9-4.4x; that is about as
fast as parsing from a std::ifstream. The new tests read with FILE buffers
of 1 to 70 bytes and unbuffered files, after ungetc(), with SAX positions
and with binary strings across the buffer's edges.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Tests: no setvbuf() buffer below 2 bytes on Windows

The Microsoft C runtime rejects a _IOFBF buffer size below 2 as an
invalid parameter and ends the process (0xc0000409), which made
test-file_input fail on all MSVC and clang-cl jobs.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix CI: astyle formatting in unit-file_input.cpp

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Tests: limit the multi-character ungetc() test to glibc and Apple

The Windows C runtime only supports one pushed-back character, which
broke the Windows CI jobs.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasEsrzHhSNouxSoEwqz
Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Tests: sweep_allocator::construct() accepts pointers to const

Recent libc++ (emsdk latest) probes construct(const T*, const T&) in an
unevaluated context while checking for trivial copies; the static_cast to
void* in the noexcept specification then fails to compile.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasEsrzHhSNouxSoEwqz
(cherry picked from commit 794bf70823c12a2a1cb2a8a95f34dfb6357746a8)
Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Tests: guard sweep_allocator::construct() against const types instead of const_cast

The const_cast added in the previous commit is rejected by
cppcoreguidelines-pro-type-const-cast (clang-tidy). Make construct() not
viable for const U instead, which is what libc++ probes for.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasEsrzHhSNouxSoEwqz
(cherry picked from commit de099fa607001b710862fd1bbecef3609c54cbc4)
Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix CI: astyle and clang-tidy for sweep_allocator::construct()

astyle 3.4.13 reformats the enable_if<!...> default template argument
(Check amalgamation). Delete the const overload instead, which makes the
libc++ probe for const objects fail in the SFINAE context just the same
and needs no <type_traits>.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasEsrzHhSNouxSoEwqz
Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
 2026-11-07 10:11:09 +01:00
Niels LohmannandClaude Sonnet 5.5 951271127b Binary readers: append strings straight from contiguous input (#6028) 
* Binary readers: append strings straight from contiguous input

get_bytes() read every string into a zero-filled resize() and copied the
bytes over it, so each byte was written twice. A string that the input holds
in one block (bulk_remaining() at least its length) is now appended from it
directly. The claimed length is checked against the input first, so a huge
claimed length still allocates nothing it cannot fill; other inputs and
binary values keep the chunked loop.

from_cbor() and from_msgpack() of twitter.json and citm_catalog.json get
5.5-9.1% faster on an Apple M1 Max and 2.7-8.6% on x86-64 (GCC 15, Clang 21);
canada.json, which has few strings, is unchanged.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Binary readers: keep the tag argument of append_from_block() astyle-proof

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix CI: bugprone-signed-char-misuse in append_from_block

Convert the (positive) length to its unsigned type before widening it
to std::size_t, as clang-tidy flags the int8_t to std::size_t cast.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Tests: sweep_allocator::construct() accepts pointers to const

Recent libc++ (emsdk latest) probes construct(const T*, const T&) in an
unevaluated context while checking for trivial copies; the static_cast to
void* in the noexcept specification then fails to compile.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasEsrzHhSNouxSoEwqz
(cherry picked from commit 794bf70823c12a2a1cb2a8a95f34dfb6357746a8)
Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Tests: guard sweep_allocator::construct() against const types instead of const_cast

The const_cast added in the previous commit is rejected by
cppcoreguidelines-pro-type-const-cast (clang-tidy). Make construct() not
viable for const U instead, which is what libc++ probes for.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasEsrzHhSNouxSoEwqz
(cherry picked from commit de099fa607001b710862fd1bbecef3609c54cbc4)
Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix CI: astyle and clang-tidy for sweep_allocator::construct()

astyle 3.4.13 reformats the enable_if<!...> default template argument
(Check amalgamation). Delete the const overload instead, which makes the
libc++ probe for const objects fail in the SFINAE context just the same
and needs no <type_traits>.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasEsrzHhSNouxSoEwqz
Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
 2026-11-07 10:10:50 +01:00
Niels LohmannandClaude Sonnet 5.5 cbb9e14889 Fix ci_emscripten: make sweep_allocator::construct() not viable for const types (#6036) 
* Tests: make sweep_allocator::construct() not viable for const types

The newest libc++ (emsdk latest, used by ci_emscripten) probes
construct(const T*, const T&) in an unevaluated context while checking
whether copies are trivial. For the test allocator, instantiating the
noexcept specification then fails to compile, because static_cast<void*>
cannot drop the const qualifier. Constrain construct() to non-const types,
which makes the probe fail in the SFINAE context instead of with a hard
error.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasEsrzHhSNouxSoEwqz
Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix CI: astyle and clang-tidy for sweep_allocator::construct()

astyle 3.4.13 reformats the enable_if<!...> default template argument
(Check amalgamation). Delete the const overload instead, which makes the
libc++ probe for const objects fail in the SFINAE context just the same
and needs no <type_traits>.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasEsrzHhSNouxSoEwqz
Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
 2026-11-07 10:10:21 +01:00
Niels Lohmann 97ce0e1e5d docs: blog post: comparing already passes the depth; copying measured slower without the counter 
operator== walks the standard containers itself and passes the depth as an
argument (#5840). A copy that does the same, inserting element by element,
measured 4-16% slower on an M1 Max with Apple clang, so copying keeps the
thread_local counter.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-06 17:44:50 +01:00
Niels Lohmann 92d369e217 docs: blog post: note that Boost.JSON's tree lead comes from its arena 
The comparison builds Boost.JSON's tree in a monotonic_resource. With its
default allocator and precise numbers, boost::json::parse() takes as long
as json::parse() on twitter.json, 5% longer on citm_catalog.json and 17%
less time on canada.json (M1, C++23 -O3, best of 3 x 30 runs; the arena
saves Boost.JSON 28-41%).

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-06 09:59:21 +01:00
Niels Lohmann c6f367450b docs: blog post: address the second round of review comments 
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-06 08:41:49 +01:00
Niels Lohmann 5b0ad0bc5b docs: wrap the prose of the performance blog post at 120 columns 
Only line breaks change: the rendered page is identical after whitespace normalization.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-05 20:47:50 +01:00
Niels Lohmann 5a7f63aea4 docs: address review comments on the performance blog post 
- fix wording: "are new", "for each input source", "the strings", "the last zero to seven bytes", "by" Danila
  Kutenin, "the result of that query"
- introduce `json_document` where it first gets a detail, say that the `-mbranches` flag is not used, explain
  why the position and token bookkeeping overloads are empty, and say that a step's percentage is relative to
  the time before the step and that a median of 4 is the mean of the two middle values
- write percentages without a space before `%` in the post and in the price figure (regenerated)

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-05 20:47:49 +01:00
Niels Lohmann b54267d2a7 Docs: compile times of JSON_HAS_STD_FORMAT=0 and JSON_HAS_RANGES=0 (#6025) 
Add sections on switching off std::format and ranges support to the
compile-times page, with measurements (Apple clang, GCC 16, -std=c++20),
the functionality that is lost, and chart rows (issue #5294).

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-05 16:04:39 +01:00
Niels Lohmann e48800f09d Binary reader and writer: remove checks that invariants make dead (#6001) 
* Binary reader and writer: remove checks that invariants make dead

Branch coverage of the test suite and of 24k mutated inputs showed
these conditions as never taken; each is implied by a check made
earlier on the same path:

- check_bson_document_size: `document_size < 0` (the size was rejected
  below 5 before it was stored)
- get_ubjson_ndarray_size: `second != 'N'` ('N' is rejected as a type
  marker before `second` can be set)
- bjd_type_name() == nullptr for an ndarray dtype: every marker
  is_valid_optimized_type() accepts for BJData has a name (now an assert)
- the early is_bjd_excluded_optimized_type() check in
  get_ubjson_size_type(): is_valid_optimized_type() rejects the same
  eight markers with the same error
- `input_format == bjdata` next to `is_ndarray`, bit 8 of the type, or a
  'B'/'u'/'m'/'M' marker: these only arise for BJData
- `first != npos` next to bit 8: the bit is only set after a count
- MessagePack writer: the `<= max` halves of the negative int8/16/32
  ladder (the ladder is in the `else` of `n >= 0`)

No change in behaviour: a build that aborts on each removed side passes
the test suite and the fuzz corpora, and a 1.6M-input differential run
of the reader against the original headers found no difference.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Remove is_bjd_excluded_optimized_type(), which has no caller left; fix two comments

is_valid_optimized_type() rejects the markers BJData excludes, so the reader
no longer needs its own list; the test now checks is_valid_optimized_type()
of a BJData reader against the writer's list. The BSON size comment now says
that open_bson_document() rejects a size below 5.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Make the BJData reader in the lookup test const (misc-const-correctness)

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-04 23:42:17 +01:00
dependabot[bot] 20fe34ceeb build(deps): bump lukka/get-cmake from 4.4.4 to 4.4.5 (#6024) 
Bumps [lukka/get-cmake](https://github.com/lukka/get-cmake) from 4.4.4 to 4.4.5.
- [Release notes](https://github.com/lukka/get-cmake/releases)
- [Changelog](https://github.com/lukka/get-cmake/blob/main/RELEASE_PROCESS.md)
- [Commits](https://github.com/lukka/get-cmake/compare/a89e43e22a96abafcd7a62db652a65ecd33052c9...f86dd60acae0d132056913e248bdabf0e0580b7a)

---
updated-dependencies:
- dependency-name: lukka/get-cmake
  dependency-version: 4.4.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
 2026-11-04 23:38:57 +01:00
Christoph Grüninger 1da8735154 Fix leak and crash when an allocation throws during parsing (#6023) 
json_sax_dom_parser::insert_key_with_index: own the new object_key_index
in a unique_ptr before key_indexes may reallocate; a throwing reallocation
leaked it.

Signed-off-by: Christoph Grüninger <foss@grueninger.de>
 2026-11-04 23:38:47 +01:00
Niels Lohmann a49242f088 Docs: reading and writing files; patch_inplace() is not atomic (#6017) 2026-11-04 17:46:20 +01:00
Niels Lohmann 42825fba07 Binary writers: zero only a window ahead of the vector sink's position (#6020) 
output_vector_sink grew the vector by resizing it to its whole new
capacity. resize() zeroes the characters it adds, so every doubling
zeroed megabytes of a fresh allocation at once: that faults in all its
pages and evicts them from the cache before the writer reaches them,
and the writer's stores then miss again. The sink now reserves the same
capacity as before but resizes the vector only to 64 KiB
(vector_sink_window) ahead of the position, which is still cached when
the writer's stores come.

to_cbor(), to_msgpack(), to_ubjson(), to_bjdata() and to_bon8() of an
array of one million numbers into a fresh vector: 4-26 % faster on x86
(Skylake laptop with Apple clang 13, Haswell VPS with GCC 16 and
Clang 23), 1-2.5 % on Apple M1 Max; other documents unchanged (within
0.4 % in reruns). The capacity and growth of the vector are as before.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-04 17:13:25 +01:00
Niels Lohmann efc437ef6e UBJSON/BJData/MessagePack reader: reject a container count equal to SIZE_MAX (#6002) 
* UBJSON/BJData reader: reject a container count equal to SIZE_MAX

The reader marks a container whose count is not known by npos, which
is SIZE_MAX. A count of exactly that value was stored unchanged and
then read as "no count", so the BJData input

    [ # M ff ff ff ff ff ff ff ff i 01 ]

parsed as [1] instead of throwing out_of_range.408 as a count of
2^64-2 does. Where size_t is 32 bits, the same holds for 'm' and 'L'
counts of 2^32-1, in UBJSON too.

The counts of 'm', 'M' and the signed types now go through
store_ubjson_count(), which rejects npos with "integer value overflow"
(the message a count beyond size_t already gets), as the CBOR reader
does in get_cbor_container_size(). An ND-array dimension of 2^64-1 gets
the same message now, where it was "excessive ndarray size caused
overflow" (the product check) on 64-bit platforms.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* MessagePack reader: reject an array/map 32 length equal to SIZE_MAX

On a platform with a 32-bit std::size_t, an array 32 or map 32 length of
0xFFFFFFFF equals unknown_size(), so start_array()/start_object() were
told the size was unknown and skipped the max_size() check. Route both
through the CBOR length check, renamed get_container_size(), which
already rejects that value.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-04 17:13:16 +01:00
Niels Lohmann a6650e75f1 Print the history benchmark's results with a stream 
Flawfinder flagged the printf in history.cpp (CWE-134), although its format string is a constant. The stream prints the
same text, so history.py reads it as before.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-04 05:35:16 +01:00
Niels Lohmann 247b3cd5bf Format bench_all.cpp with astyle 
The amalgamation check runs astyle over tests/ and failed on bench_all.cpp. The variant tables keep one variant per
line between *INDENT-OFF* and *INDENT-ON*; astyle formats the rest, and the list of use cases becomes a named array so
the loop header stays on one line.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-04 05:33:33 +01:00
Niels Lohmann b4f3998f94 docs: make the comparison of the 3.13.0 post fairer 
Three reviews of "How it compares" (a maintainer audit of the harness, a
methodology review, a reader's red team) led to a full rerun on the Mac and
x86-64 with simdjson 5.1.1 and new ways in the harness:

- in-place parses with the copy made before the timer ("(copy untimed)",
  never chosen as a library's best) and json_document::parse_copy();
- RapidJSON through StringStream, and with default precision in validate,
  which reads no number;
- BENCH_ONLY takes several prefixes.

The post now gives the copy's real cost (11-14 us for twitter.json on the
Mac, not 30), what yyjson gains without it, the run-to-run noise, the LTO
check, the single-file losses that were missing, and qualifies the headline
claim. Every number in the section and Appendix E is recomputed; the
NUL-byte remark moved out of the body.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-03 22:13:24 +01:00
Niels Lohmann 57b898ef99 Replace a multibyte decimal point in dump() of a long double (#5998) 2026-11-03 19:17:41 +01:00
dependabot[bot] 92707f43f2 build(deps): bump step-security/harden-runner from 2.22.2 to 2.22.3 (#6021) 2026-11-03 19:17:27 +01:00
Niels Lohmann 5f49306727 docs: re-measure the 3.13.0 post and apply the review 
Measure everything again against develop with the open pull requests of
11-03 (suite, timeline, comparison on the Mac and on x86-64, compile
times, stream gap), add the suite on an Intel MacBook Pro as a check,
mark the ways that keep number text as "N" in the use-case charts, move
the loop-shape box to theme 5, and apply the style and wording fixes of
the review.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-03 15:31:38 +01:00
Niels Lohmann e32051125f Fix the build of develop: tests from #5997 and #5991 (#6019) 
* Fix the build of develop: tests from #5997 and #5991

- unit-msgpack-cpp17: assign the result of json::parse in
  CHECK_THROWS_WITH_AS (GCC -Werror=unused-result)
- unit-json_view: failing_allocator::allocate is [[noreturn]]
  (clang -Wmissing-noreturn)
- unit-class_lexer: build the quoted string once
  (clang-tidy performance-inefficient-string-concatenation)
- unit-allocator: sweep_allocator provides pointer, reference and size
  typedefs, which GCC 4.8's std::map takes from the allocator
- unit-allocator: skip the "sax_parse into an existing value" sweep with
  iterator debugging, like the parser callback sweep: MSVC's std::vector
  default constructor is noexcept but allocates its debug proxy through
  the allocator, so a failing allocation in create<array_t>() terminates

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix the remaining CI failures of the tests from #5997 and #5991

- unit-custom-object-key-type: drop the redundant member initializer and
  return a braced init list (clang-tidy); direct-initialize the converted
  value, as copy-initialization makes GCC 4.8 instantiate the copy
  constructor, which needs a range constructor strict_object lacks
- unit-stream-bulk-scan: pick the claimed get area size by tag dispatch
  instead of a constant condition (MSVC C4127)
- unit-allocator: skip the parser callback and sax_parse sweeps with
  Clang 3.4 and 3.5, which leak memory when an element constructor throws
  inside a libstdc++ std::map copy or std::vector reallocation

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix the CI failures that the first failing TU of each job hid

- unit-stream-bulk-scan: compute the claimed size without a condition;
  the tag-dispatched template was unused with a 64-bit std::size_t
  (-Wunused-template)
- unit-json_view: give failing_allocator the typedefs, rebind and
  members that GCC 4.8's std::map takes from the allocator directly
- clang-tidy hits in the tests from #5997: raw string literals
  (unit-json_view), redundant c_str() and a NOLINT for &text[0]
  (unit-locale-cpp), reserve() before a loop (unit-ordered_json), and a
  NOLINT for a return that a braced list would turn into an array
  (unit-regression1)

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Skip the 3 GiB get-area test with a 32-bit std::size_t in the preprocessor

The claimed size was a constant 0 on Win32, so `claimed == 0 || ...` was a
constant condition and MSVC reported C4127. Guard the section with
`#if SIZE_MAX > UINT32_MAX` instead, as unit-msgpack-custom-types.cpp does.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Silence modernize-use-transparent-functors for failing_map in unit-json_view

std::less<> needs C++14, and the test is also built as C++11.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-03 13:42:46 +01:00
Niels Lohmann 5c595412d1 docs: fix the facts the review of the 3.13.0 post found wrong or imprecise 
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-02 22:53:46 +01:00
Niels Lohmann baba5db36f Fix the MSVC and GCC builds of develop (C4127, -Weffc++) (#6016) 
json_view number(): #6006 folded the check of the digit after a minus
sign into `else if (!negative || ...)`, which MSVC 19.44 reports as
C4127 (conditional expression is constant) and /WX turns into an
error in every MSVC and clang-cl job. The check now sits in the
`if (negative)` block, right after the sign is skipped; the error and
its position are unchanged.

unit-locale-cpp.cpp: the locale_switching_token added in #5997 held a
`const char*`, so GCC's -Weffc++ asked for a copy constructor and copy
assignment. The locale name is now a std::string.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-02 20:07:00 +01:00
Niels Lohmann 07876e2292 json_view: a value that is not found has no bytes in its exception context (#6015) 2026-11-02 19:11:07 +01:00
Niels Lohmann 8ac5ddf2a8 docs: measure the 3.13.0 post against develop with all open pull requests of 11-02 
Suite, timeline endpoint, Appendix D and the scalar-run numbers now come from
develop b2674a4a2f with #5990-#5992, #5996-#6006 and #6008 merged. With #6008,
arrays of one element skip the scalar run, so nested arrays no longer pay for
it. The suite ran three rounds per version; the round of 3.12.0 and of 3.13.0
that differed from the other two was dropped, as the setup table says.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-02 13:05:17 +01:00
Niels Lohmann 364815bedc docs: measure the 3.13.0 post against develop with the open pull requests of 11-02 
Suite, timeline endpoint, Appendix D and the scalar-run numbers now come from
develop b2674a4a2f with #5990, #5991, #5992, #5996, #5997, #5998, #5999 and
#6000 merged. The scalar runs are measured against a build without them on
develop's code, which no longer checks for a scalar before entering the loop.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-02 04:49:54 +01:00
Niels Lohmann c321ee0d2a docs: measure the 3.13.0 post against develop with all open pull requests 
The baseline is now develop 9c349b1d7c with every open non-draft pull
request merged, including #5968, #5970, #5971, #5975, #5976, #5978,
#5979, #5980, #5981 and #5982. The suite was rerun on 11-01 with every
step repeated when the load rose above 5 while it ran; the comparison
with other libraries and the held-out files were rerun on 10-31.

- suite: 3.0x geometric mean (median 2.9x); Appendix B, the overview
  and the distribution regenerated
- timeline endpoint, Appendix D and the cliffs figure updated
- the held-out figure compares json_document with the fastest other
  library
- new paragraphs for the pull requests listed above

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-11-01 13:48:18 +01:00
Niels Lohmann 0c74ad29ba docs: add three figures to the 3.13.0 post 
- short strings: two overlapping 16-byte loads and stores
- eight digits at a time: the three multiplications, lane by lane
- validate on the 19 held-out files, per file, Mac and x86-64

The prose the figures replace is trimmed.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 20:45:09 +01:00
Niels Lohmann 5cbec344fe docs: measure the 3.13.0 post against develop with #5964 and #5908 
The suite (Appendix B, the short-version table, the overview and distribution
figures) and the timeline endpoint now measure develop d20c4dcd89 with #5964
and #5908 merged. The geometric mean stays 2.9x (2.95); Dump/signed_ints and
Dump/unsigned_ints gain 1.5x and 2.1x from #5964; GetVectorDouble/floats drops
from 10.3x to 7.0x because the old candidate's suite binary happened to compile
that loop faster (a standalone build takes 0.97 ms with both headers).

The timeline endpoint is the 10-27 value scaled by the ratio of the new to the
old candidate, both measured on 10-30, so that it stays comparable with the
other points of the timeline.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 17:33:12 +01:00
Niels Lohmann 9abc88f9cc docs: rerun the library comparison of the 3.13.0 post with fairer rules 
The figures and Appendix E use the reruns with each library's fastest
modes. Skipping number conversion while reading is now allowed for
every library; copying number text is still not chosen when writing.

The text now says who set the rules, where libraries that check less
win select, how minified files change the picture, and that the
reused jeopardy.json claim holds with every library reused. A new
section covers 19 held-out files and JSONTestSuite, including where
json_document loses, and lists what was not measured. Every
comparison number was recomputed; Glaze is credited in the intro.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 15:29:52 +01:00
Niels Lohmann ff2b8ffdac Measure each library's fastest modes in the json_view harness 
Address the points of a review from the other libraries' side:

- simdjson 5.0.8 (On-Demand structs, key selectors) and Glaze 9.1.0
- number-skipping modes: yyjson and RapidJSON raw numbers, Boost.JSON
  number_precision::none
- reused parsers and allocators for yyjson, RapidJSON and Boost.JSON
- Boost.JSON parse_into, Glaze generic with double numbers, and the
  same struct types for nlohmann, Glaze, simdjson and serde
- minified copies of twitter.json and citm_catalog.json
- a fourth probe (trailing garbage) and Glaze "(strict)" variants
- a new random variant order in every round, as a variant's time could
  depend on the one before it by up to 15 % on the Mac
- --files for other test files and --conformance for JSONTestSuite,
  with conformance-rs.sh for the Rust program

summarize.py also reports each library's best reused variant.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 15:29:51 +01:00
Niels Lohmann 647bb98ba6 docs: restructure the 3.13.0 post around themes and use cases 
- deeper technical detail and code in the eight themes; pull request
  numbers move to the appendix, timeline steps are labelled by theme
- comparison with other libraries by use case, as heatmaps per
  platform, with validation levels and the caveats next to the results
- appendix: test files, all 182 suite rows with a histogram, timeline
  steps, algorithmic fixes, per-file tables, behaviour changes, setup,
  pull requests by theme

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 15:29:50 +01:00
Niels Lohmann 540eb7c5f2 Compare JSON libraries by use case in the json_view harness 
bench_all and bench_rs now time use cases (validate, sum, select, edit,
minify, write) instead of library functions. Every library may solve a
use case in every way it offers; each variant's result is checked, and
three malformed inputs give its validation level (full, no UTF-8,
partial). summarize.py reports each library's fastest fully validating
variant and a faster one at a lower level, as text and as JSON.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 15:29:49 +01:00
Niels Lohmann 4893e14699 docs: x86-64 dump numbers with #5908's branch-free token digits 
The dump of canada.json with GCC on x86-64 lost to yyjson by 0.78 because
GCC compiled #5908's token-digit selections as branches; 9fad526888 fixed
that. The post's x86-64 dump and parse+dump rows of canada.json are now
measured with it (GCC 0.95, Clang 0.91 against yyjson), theme 5 tells the
story, and "How we measured" says which rows include the commit.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 15:29:49 +01:00
Niels Lohmann c24c177583 docs: dump comparison and split acknowledgments in the 3.13.0 post 
- a dump workload in bench_all and bench_rs: each engine writes a
  document parsed beforehand, and every output must read back with
  bit-identical numbers; an optional argument selects one workload
- the post's comparison gains a write table, a throughput chart, a dump
  row for all three configurations, and the x86-64 cases it loses
- the thanks section is split into adapted code and borrowed ideas

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 15:29:48 +01:00
Niels Lohmann f4a91f800d docs: byline and licenses for the 3.13.0 post 
- author and date below the title, styled as .nj-byline; its link gets
  no external-link icon
- the license of every library in the thanks section, checked against
  each project's license files; credit sonic-rs for QUOTE_TAB, which
  orjson adapted from it

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 15:29:47 +01:00
Niels Lohmann 4566d5ae26 docs: captions, test-file table and figure fixes for the 3.13.0 post 
- caption every table and figure
- describe what makes twitter.json, citm_catalog.json, canada.json and
  jeopardy.json hard, and what each timeline panel exercises
- split the json_view layout figure into the tree and the index, with
  the example text above; fix the arrows into the string boxes
- arrows and a "less is better" axis label in the cliffs figure
- name nlohmann/json in the comparison tables and chart
- licenses of the adapted code in the thanks section

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 15:29:46 +01:00
Niels Lohmann 7341f127d3 docs: compare json_document with Glaze, sonic, RapidJSON and Rust parsers 
Extends the comparison in "How 3.13.0 got faster" from yyjson, simdjson and
Boost.JSON to eleven engines: sonic-cpp, RapidJSON and Glaze (generic DOM,
lazy_json, reading into structs) in C++, sonic-rs, simd-json and serde_json in
Rust. Measured on an Apple M1 Max (Apple clang 21, Rust 1.99) and an x86-64
Haswell server (GCC 13, Clang 18). Every engine must return the same values,
string bytes and bit-identical number sums before it is timed.

The post now answers whether json_document is the fastest parser: it is the
fastest document parser at parse+dump everywhere and at parsing on Apple
silicon, ties with simdjson's DOM on x86-64, and loses to simdjson On-Demand
and Glaze structs when only a few fields are read.

tests/benchmarks/json_view/others holds the programs (bench_all.cpp, the Rust
crate with its Cargo.lock), summarize.py and the pinned versions and checksums.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 15:29:46 +01:00
Niels Lohmann ea848cd2e8 docs: add the blog post "How 3.13.0 got faster" 
A post for the documentation (Home > Blog) on how 3.13.0 became faster:
eight themes with the pull requests behind them, the ideas taken from other
libraries, what did not work, how the fast paths are tested, and the
compile-time cost. Every number comes from a run on 2026-10-27 (3.12.0 against
develop plus the open non-draft PRs, Apple M1 Max) or from the linked PR.

- docs/mkdocs/docs/home/blog/how_3_13_0_got_faster.md: the post.
- docs/mkdocs/scripts/figures/perf_blog.py: draws its 12 figures (overview,
  eight timeline panels, the SWAR test, the cliffs, json_view throughput) as
  inline SVGs in the nj-charts style; data/perf_timeline.csv holds the
  timeline.
- tests/benchmarks/history: history.cpp and history.py time one fixed program
  against the header of every commit that changed it, interleaved, and write
  one CSV row per commit with its PR. The timeline of the post comes from it.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
 2026-10-30 15:29:45 +01:00
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uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Check that Meson and pkg-config offer the CMake options
run: make check_build_options
- name: Install Meson
@@ -80,7 +80,7 @@ jobs:
runs-on: ubuntu-26.04
steps:
- name: Harden Runner
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
with:
egress-policy: audit
@@ -92,7 +92,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -112,7 +112,7 @@ jobs:
target: [ci_test_single_header, ci_cppcheck, ci_cpplint, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_reuse_compliance, ci_test_valgrind]
steps:
- name: Harden Runner
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
with:
egress-policy: audit
@@ -123,7 +123,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -142,7 +142,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -168,7 +168,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -178,7 +178,7 @@ jobs:
runs-on: ubuntu-26.04
steps:
- name: Harden Runner
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
with:
egress-policy: audit
@@ -244,7 +244,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: CXX=g++-${{ matrix.compiler }} cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -262,7 +262,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -279,7 +279,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Disable filesystem support (std::filesystem is unusable) for clang 7 / 8 / 9 / 10
run: echo "JSON_FORCED_GLOBAL_COMPILE_OPTIONS=-DJSON_HAS_FILESYSTEM=0;-DJSON_HAS_EXPERIMENTAL_FILESYSTEM=0" >> "$GITHUB_ENV"
if: ${{ matrix.compiler == '7' || matrix.compiler == '8' || matrix.compiler == '9' || matrix.compiler == '10' }}
@@ -299,7 +299,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -319,7 +319,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build with libc++
@@ -346,7 +346,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -366,7 +366,7 @@ jobs:
# import-std support. Its opt-in token is CMake-version-specific, so pin
# CMake to the version whose token is set in tests/module_cpp20/CMakeLists.txt.
- name: Get pinned CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
with:
cmakeVersion: 4.3.4
# Clang: the std library module is provided by libc++ (the image's libstdc++
@@ -392,7 +392,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -409,7 +409,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -423,7 +423,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DJSON_CI=On
- name: Build
@@ -433,7 +433,7 @@ jobs:
runs-on: ubuntu-26.04
steps:
- name: Harden Runner
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
with:
egress-policy: audit
@@ -443,7 +443,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Run CMake
run: cmake -S . -B build -DCMAKE_TOOLCHAIN_FILE=$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -GNinja
- name: Build
@@ -456,7 +456,7 @@ jobs:
target: [ci_test_examples, ci_test_build_documentation, ci_test_documentation_mermaid]
steps:
- name: Harden Runner
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
with:
egress-policy: audit
@@ -484,7 +484,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Check that the job runs natively on arm64
run: uname -m && test "$(uname -m)" = aarch64
- name: Run CMake
.github/workflows/windows.yml
+2 -2
View File
@@ -90,7 +90,7 @@ jobs:
with:
persist-credentials: false
- name: Get latest CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
- name: Set extra CXX_FLAGS for latest std_version
# /wd5285 silences C5285 emitted by the bundled third-party doctest.h, which
# specializes std::tuple (newly diagnosed by the VS2026 v145 toolset)
@@ -216,7 +216,7 @@ jobs:
# import-std support. Its opt-in token is CMake-version-specific, so pin
# CMake to the version whose token is set in tests/module_cpp20/CMakeLists.txt.
- name: Get pinned CMake and ninja
uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
with:
cmakeVersion: 4.3.4
# CMAKE_CXX_FLAGS replaces CMake's MSVC defaults (which include /EHsc), and
docs/mkdocs/docs/api/basic_json/patch_inplace.md
+16 -3
View File
@@ -15,7 +15,9 @@ the patch. This function applies a JSON patch in place and returns void.
## Exception safety
No guarantees, value may be corrupted by an unsuccessful patch operation.
No guarantees: if an operation fails, the operations before it stay applied, and a failing `move` operation may already
have removed the value at its "from" location. Use [`patch`](patch.md) if the value must be unchanged after a failed
patch.
## Exceptions
@@ -62,8 +64,19 @@ the JSON value, the complexity can usually be neglected.
## Notes
Unlike [`patch`](patch.md), `patch_inplace` applies the operation "in place" and no copy of the JSON value is created.
That makes it faster for large documents by avoiding the copy. However, the JSON value might be corrupted if the
function throws an exception.
That makes it faster for large documents by avoiding the copy.
!!! warning "Not atomic"
`patch_inplace` applies the operations one after the other and does not undo them when one fails. After an
exception, the value holds the result of the operations before the failing one, and a failing `move` operation
(a "remove" followed by an "add") may already have removed the value at its "from" location; see the second example
below. [RFC 6902](https://tools.ietf.org/html/rfc6902#section-5) requires that a patch with a failing operation is
not deemed successful, but leaves open what happens to the document.
If the value must stay unchanged when the patch fails, use [`patch`](patch.md), which applies the patch to a copy:
`#!cpp j = j.patch(json_patch);`. Validating the patch beforehand is not enough, as "test" operations and missing
paths are only detected while the patch is applied.
Duplicate member names inside an operation object are resolved by the parser before the patch is applied (the last one
is kept, see [`object_t`](object_t.md#behavior)), so `#!json {"op": "add", "op": "remove", "path": "/a"}` is a
docs/mkdocs/docs/api/macros/json_disable_unlocked_file_io.md
+14 -4
View File
@@ -5,7 +5,9 @@
```
When defined to `1`, parsing from a `#!cpp FILE*` reads every character with `std::fgetc`, as in version 3.12.0 and
earlier, instead of locking the file once and reading it with the unlocked stdio functions.
earlier, instead of locking the file once and reading it with the unlocked stdio functions. This also turns off the
scan of the `FILE`'s buffer in bulk (see below), which [`JSON_DISABLE_STREAM_BULK_SCAN`](json_disable_stream_bulk_scan.md)
does not affect.
It does not change any result: values, exceptions, and the position of the file after parsing are the same either way.
Only the speed and the locking of the file differ (see the notes on locking below).
@@ -37,9 +39,17 @@ The default value is `0`: the file is locked once and read with the unlocked std
| Microsoft (MSVC, clang-cl) | `_lock_file`, `_fgetc_nolock`, `_unlock_file` |
| others (e.g., musl, MinGW, newlib) | `std::fgetc`, as before |
This makes parsing from a `FILE*` 3 to 4 times as fast with the Apple C library and 1.1 to 1.3 times as fast with
glibc, whose locking is cheaper. The binary formats ([`from_cbor`](../basic_json/from_cbor.md),
[`from_msgpack`](../basic_json/from_msgpack.md), ...) read from a `FILE*` the same way.
With glibc and the Apple C library, the parser also scans the characters that the `FILE` already holds in its
buffer in bulk, as it scans the get area of a stream (see
[`JSON_DISABLE_STREAM_BULK_SCAN`](json_disable_stream_bulk_scan.md)): it reads the same fields of the `FILE` that
the C library's own `getc_unlocked` reads, and it consumes exactly the characters that `getc_unlocked` would have
returned, so the file is left where it was left before.
Locking the file once makes parsing from a `FILE*` 3 to 4 times as fast with the Apple C library and 1.1 to 1.3
times as fast with glibc, whose locking is cheaper. Scanning the buffer in bulk makes `parse()` another 1.7 to 2.6
times as fast (and `accept()` 2.9 to 4.4 times), about as fast as parsing from a `std::ifstream`. The binary
formats ([`from_cbor`](../basic_json/from_cbor.md), [`from_msgpack`](../basic_json/from_msgpack.md), ...) read
from a `FILE*` the same way.
!!! note "Locking"
docs/mkdocs/docs/css/brand.css
+25 -1
View File
@@ -759,9 +759,14 @@ body:has(.nj-hero) .md-content {
}
}
/* blog posts: author and date right below the title */
.md-typeset .nj-byline { margin: -.8rem 0 1.6rem; font-size: .75rem; color: var(--md-default-fg-color--light); }
.md-typeset .nj-byline a { color: inherit; }
.md-typeset .nj-byline a:hover { color: var(--md-accent-fg-color); }
/* figure captions: "Figure N." in bold, close to the figure, set in from the text column; figures and tables are
numbered per page, each with its own counter */
.md-content__inner { counter-reset: nj-figure nj-table; }
.md-content__inner { counter-reset: nj-figure nj-table nj-listing; }
.md-typeset :is(.nj-caption, .nj-charts-caption) {
max-width: none;
margin: .3rem 2rem 1.5rem;
@@ -782,6 +787,25 @@ body:has(.nj-hero) .md-content {
.md-typeset :is(.nj-caption, .nj-charts-caption) { margin-inline: 1rem; }
}
/* code captions: "Listing N." in bold, directly below the code block, in the figure caption style */
.md-typeset .nj-code-caption {
max-width: none;
margin: -.4rem 2rem 1.5rem;
font-size: .75rem;
line-height: 1.5;
text-align: left;
color: var(--md-default-fg-color--light);
}
.md-typeset .nj-code-caption::before {
counter-increment: nj-listing;
content: "Listing " counter(nj-listing) ". ";
font-weight: 700;
color: var(--md-default-fg-color);
}
@media screen and (max-width: 44.9375em) {
.md-typeset .nj-code-caption { margin-inline: 1rem; }
}
/* table captions: "Table N." in bold, directly below the table, in the figure caption style */
.md-typeset .nj-table-caption {
max-width: none;
docs/mkdocs/docs/css/fig-charts.css
+44
View File
@@ -27,6 +27,10 @@
.md-typeset svg.nj-charts--compile, .md-typeset svg.nj-charts--scaling { max-width: 26rem; }
.md-typeset svg.nj-charts--sizes { max-width: 26rem; }
/* home/blog/how_3_13_0_got_faster.md (scripts/figures/perf_blog.py) */
.md-typeset svg.nj-charts--blog { max-width: 34rem; }
.md-typeset svg.nj-charts--swar { max-width: 34rem; }
.md-typeset svg.nj-charts--timeline { max-width: 22rem; }
.nj-charts text { fill: currentColor; font-size: 13px; }
.nj-charts .nj-charts-leg { font-size: 13.5px; }
@@ -43,10 +47,34 @@
paint-order: stroke; stroke: var(--md-default-bg-color); stroke-width: 4px; stroke-linejoin: round; }
.nj-charts .nj-charts-factor { fill: var(--nj-charts-ink2); font-size: 12px; font-weight: 600; text-anchor: middle; }
.nj-charts .nj-charts-note { fill: var(--nj-charts-ink2); font-size: 12px; }
/* heatmap cells (perf_blog_usecases_*.svg): green for the fastest, gray around twice the time, red for the slowest;
adjacent steps checked for CVD separation on the light and the slate surface; the numbers are in every cell */
.md-typeset svg.nj-charts--heat { max-width: 49rem; }
.nj-charts--heat { --nj-heat-0: #3fa557; --nj-heat-1: #8bcc95; --nj-heat-2: #ebeae6; --nj-heat-3: #f2ae9b;
--nj-heat-4: #dc5a43; --nj-heat-ink: #1b1b1b; --nj-heat-ink-strong: #1b1b1b; }
[data-md-color-scheme="slate"] .nj-charts--heat { --nj-heat-0: #3a9d50; --nj-heat-1: #2c6b3a; --nj-heat-2: #33353a;
--nj-heat-3: #8a3f2e; --nj-heat-4: #d95b3a; --nj-heat-ink: #e8e8e6; --nj-heat-ink-strong: #141414; }
.nj-charts .nj-heat-0 { fill: var(--nj-heat-0); }
.nj-charts .nj-heat-1 { fill: var(--nj-heat-1); }
.nj-charts .nj-heat-2 { fill: var(--nj-heat-2); }
.nj-charts .nj-heat-3 { fill: var(--nj-heat-3); }
.nj-charts .nj-heat-4 { fill: var(--nj-heat-4); }
.nj-charts .nj-heat-na { fill: none; stroke: var(--nj-charts-grid); stroke-width: 1; }
.nj-charts .nj-charts-cell { fill: var(--nj-heat-ink); font-size: 12px; font-variant-numeric: tabular-nums; }
.nj-charts :is(.nj-heat-0, .nj-heat-4) ~ .nj-charts-cell { fill: var(--nj-heat-ink-strong); }
.nj-charts .nj-charts-cell--small { font-size: 10.5px; }
.nj-charts .nj-heat-cell { cursor: default; outline: none; }
.nj-charts .nj-heat-cell:is(:hover, :focus-visible, .nj-heat-on) rect { stroke: var(--md-default-fg-color); stroke-width: 1.5; }
.nj-heat-tip { position: absolute; z-index: 5; max-width: 24rem; padding: .5rem .7rem; border-radius: 6px;
background: var(--md-default-bg-color); color: var(--md-default-fg-color);
box-shadow: 0 2px 10px rgba(0, 0, 0, .25); font-size: .68rem; line-height: 1.45; pointer-events: none; }
.nj-heat-tip strong { display: block; margin-bottom: .2rem; }
.nj-heat-tip[hidden] { display: none; }
.nj-charts .nj-charts-grid { stroke: var(--nj-charts-grid); stroke-width: 1; }
.nj-charts .nj-charts-zero, .nj-charts .nj-charts-axis { stroke: var(--nj-charts-base); stroke-width: 1.5; }
.nj-charts .nj-charts-ref { stroke: currentColor; stroke-width: 1.5; }
.nj-charts .nj-charts-head { fill: var(--nj-charts-base); }
.nj-charts .nj-charts-c1 { fill: var(--nj-charts-c1); }
.nj-charts .nj-charts-c2 { fill: var(--nj-charts-c2); }
@@ -140,3 +168,19 @@
/* direct line labels replace the legend */
.nj-charts .nj-charts-name-json { fill: var(--nj-charts-json-c); font-weight: 600; }
.nj-charts .nj-charts-name-ojson { fill: var(--nj-charts-ojson-c); font-weight: 600; }
/* theme badges of home/blog/how_3_13_0_got_faster.md: the number of one of the eight themes, as a digit in a blue
circle, in headings, text, tables and the timeline figures (nj-theme-dot); "U" and other marks are gray */
.md-typeset .nj-theme { display: inline-flex; align-items: center; justify-content: center; box-sizing: border-box;
min-width: 1.45em; height: 1.45em; padding: 0 .3em; border-radius: .725em; vertical-align: .08em;
background: var(--nj-blue); color: var(--md-default-bg-color); font-size: .78em; font-weight: 700; line-height: 1;
font-variant-numeric: tabular-nums; text-decoration: none; }
.md-typeset a.nj-theme:is(:hover, :focus-visible) { background: var(--nj-blue-deep); color: var(--md-default-bg-color); }
.md-typeset .nj-theme--other { background: var(--md-default-fg-color--light); }
.md-typeset h2 .nj-theme { margin-right: .35em; vertical-align: .12em; }
.md-typeset .nj-theme-list > ul { list-style: none; margin-left: 0; }
.md-typeset .nj-theme-list > ul > li { margin-left: 0; padding-left: 2em; text-indent: -2em; }
.md-typeset .nj-theme-list > ul > li > .nj-theme { margin-right: .55em; text-indent: 0; }
.nj-charts .nj-theme-dot { fill: var(--nj-blue); }
.nj-charts .nj-theme-dot--other { fill: var(--nj-charts-ink2); }
.nj-charts .nj-theme-num { fill: var(--md-default-bg-color); font-size: 11px; font-weight: 700; }
docs/mkdocs/docs/features/files.md
+130
View File
@@ -0,0 +1,130 @@
# Reading and writing files
The library has no functions that take a file name. It reads from and writes to streams, so files are handled with
`#!cpp std::ifstream` and `#!cpp std::ofstream` (or a `#!cpp FILE*` when reading). This page collects the recipes for
the common cases and the mistakes that show up again and again.
## Reading a JSON file
Pass the stream to [`parse`](../api/basic_json/parse.md) directly, and check that the file was opened:
```cpp
#include <fstream>
#include <stdexcept>
#include <string>
#include <nlohmann/json.hpp>
using json = nlohmann::json;
json read_json_file(const std::string& path)
{
std::ifstream f(path);
if (!f.is_open())
{
throw std::runtime_error("cannot open " + path);
}
return json::parse(f);
}
```
- **Check that the file is open.** A stream that failed to open looks like an empty input, so `parse` reports
[`parse_error.101`](../home/exceptions.md#jsonexceptionparse_error101) ("unexpected end of input") at line 1,
column 1 instead of saying that the file is missing. A relative path is resolved against the working directory of the
running program, which is often not the directory of the source file (see the
[FAQ](../home/faq.md#parsing-a-file-fails-with-unexpected-end-of-input)).
- **Don't read the file into a string first.** Parsing from a `#!cpp std::ifstream` is only about 10 to 20 % slower
than reading the whole file into a string with one `read()` and parsing that, and it needs no memory for the copy (see
[input sources and performance](parsing/index.md#input-sources-and-performance)). The common way to read a file with
`#!cpp std::istreambuf_iterator<char>` is so slow that it takes about twice as long as parsing from the stream. Read
the file into a string only if you need the text itself, for example for an error message. This advice is for
`#!cpp json::parse`. [`json_document`](json_view.md) reads a stream into a buffer that it owns anyway, so there is no
copy to save: reading the file into a `#!cpp std::string` yourself and passing that as an lvalue, which the document
borrows, was about 6 to 12 % faster than parsing from the stream, with the same single buffer.
- `parse` requires the file to hold exactly one JSON value. Files with one value per line are read with
[JSON Lines](parsing/json_lines.md); files too large for memory are covered in
[Large, streamed, and partial input](parsing/large_and_partial_input.md).
## Writing a JSON file
[`dump`](../api/basic_json/dump.md) the value into a string first, then write the string:
```cpp
void write_json_file(const std::string& path, const json& j)
{
const std::string text = j.dump(4) + '\n'; // may throw: nothing is written yet
std::ofstream f(path, std::ios::binary);
if (!f.is_open())
{
throw std::runtime_error("cannot open " + path);
}
f << text;
f.close();
if (f.fail())
{
throw std::runtime_error("cannot write " + path);
}
}
```
- **Serialize before opening the file.** Opening a `#!cpp std::ofstream` truncates the file. `dump` and
[`operator<<`](../api/operator_ltlt.md) throw [`type_error.316`](../home/exceptions.md#jsonexceptiontype_error316)
when a string is not valid UTF-8 (see [handling invalid UTF-8](serialization.md#handling-invalid-utf-8)), and
`#!cpp f << std::setw(4) << j` may already have written part of the value when it throws. Serializing into a string
first leaves the old file untouched in that case.
- **Check the stream after closing it.** A full disk or a missing permission sets the stream's error state; it does not
throw unless you enabled exceptions on the stream with `exceptions()`.
- `std::ios::binary` writes the text as it is. Without it, Windows writes `\r\n` for every newline of a pretty-printed
value.
## Replacing a file without corrupting it
The library never writes a file itself, so this section is not about the library. It is general C++ advice for a
problem users of the library keep running into.
A program that crashes or is killed while it writes leaves a truncated file behind. To make sure readers see either the
old or the new contents, write to a temporary file in the same directory and rename it over the original
(C++17, `#!cpp <filesystem>`):
```cpp
#include <filesystem>
void replace_json_file(const std::filesystem::path& path, const json& j)
{
std::filesystem::path tmp = path;
tmp += ".tmp"; // use a unique name if several processes may write the file
write_json_file(tmp.string(), j);
std::filesystem::rename(tmp, path); // replaces path
}
```
The temporary file must be in the same directory (more precisely, on the same file system) as the target: a rename
across file systems does not fall back to a copy, it fails and throws `#!cpp std::filesystem::filesystem_error`. On
POSIX systems, the rename atomically replaces the file. Standard C++ has no way to flush a file to the disk (`fsync`),
so this protects against a crashed program, but not necessarily against a power loss.
## Binary formats
The [binary formats](binary_formats/index.md) work the same way, with the streams opened in binary mode:
```cpp
// read
std::ifstream in("data.cbor", std::ios::binary);
json j = json::from_cbor(in);
// write
const std::vector<std::uint8_t> bytes = json::to_cbor(j);
std::ofstream out("data.cbor", std::ios::binary);
out.write(reinterpret_cast<const char*>(bytes.data()), static_cast<std::streamsize>(bytes.size()));
```
Without `std::ios::binary`, Windows turns the bytes `0x0D 0x0A` into `0x0A` and may stop at a byte `0x1A` while reading,
and turns `0x0A` into `0x0D 0x0A` while writing, which corrupts the data.
## See also
- [Parsing](parsing/index.md) - the inputs `parse` accepts
- [Serialization](serialization.md) - the options of `dump`
- [`parse`](../api/basic_json/parse.md), [`dump`](../api/basic_json/dump.md)
- [`operator>>`](../api/operator_gtgt.md), [`operator<<`](../api/operator_ltlt.md)
docs/mkdocs/docs/features/index.md
+2
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@@ -46,6 +46,8 @@ C++ types, and finally serialize it again.
[BJData](binary_formats/bjdata.md), [BON8](binary_formats/bon8.md), [BSON](binary_formats/bson.md),
[CBOR](binary_formats/cbor.md), [MessagePack](binary_formats/messagepack.md), or [UBJSON](binary_formats/ubjson.md).
- [Binary values](binary_values.md) — store and exchange raw byte sequences.
- [Reading and writing files](files.md) — read and write files safely, including replacing a file without
corrupting it.
## How values are stored and configured
docs/mkdocs/docs/features/json_patch.md
+2 -1
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@@ -29,7 +29,8 @@ other three continue on its result.
[`patch`](../api/basic_json/patch.md) leaves the original value unchanged and returns the patched result as a copy.
If the document is large and the original value is no longer needed,
[`patch_inplace`](../api/basic_json/patch_inplace.md) applies the same operations in place instead.
[`patch_inplace`](../api/basic_json/patch_inplace.md) applies the same operations in place instead. Unlike
`patch`, it is not atomic: if an operation fails, the operations before it stay applied.
!!! note "Duplicate member names"
docs/mkdocs/docs/features/json_view.md
+3 -1
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@@ -160,7 +160,9 @@ document: `#!cpp auto v = json_document::parse(text).root();` does not compile.
wide. The limit is 16 bytes below 2^32, because the parser reads in 16-byte steps, and a position one step past the
end must still fit.
- **A stream is always read to its end.** There is no partial/streaming read of an `#!cpp std::istream`: the stream
is read to its end into a buffer the document owns, and parsing starts after that.
is read to its end into a buffer the document owns, and parsing starts after that. For a file, reading it into a
`#!cpp std::string` yourself and parsing that (an lvalue is borrowed) is therefore not more expensive in memory, and
was about 6 to 12 % faster than parsing from an `#!cpp std::ifstream`.
- **Fewer source positions after edits.** With
[`JSON_DIAGNOSTIC_POSITIONS`](../api/macros/json_diagnostic_positions.md) enabled,
[`materialize()`](../api/basic_json_view/materialize.md) sets the same positions as `#!cpp basic_json::parse()`.
docs/mkdocs/docs/features/parsing/index.md
+6 -1
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@@ -35,6 +35,8 @@ std::ifstream f("example.json");
json data = json::parse(f);
```
See [Reading and writing files](../files.md) for checking that the file was opened and for writing files safely.
The input must be encoded in UTF-8; other encodings are not supported. The exception is wide-character input, which
is read as UTF-16 or UTF-32 — depending on the character type — and converted to UTF-8; see the
[`parse`](../../api/basic_json/parse.md) page for an example. A single input may contain only one JSON value.
@@ -75,7 +77,7 @@ them faster than others:
|--------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------|
| strings, string views, string literals, contiguous containers, pointer or iterator ranges over contiguous memory | the whole input is scanned in bulk: runs of string characters, numbers, and indentation are recognized several bytes at a time |
| `#!cpp std::istream` (`#!cpp std::ifstream`, `#!cpp std::istringstream`, ...) | the characters the stream buffer holds are scanned in bulk like a string; the stream buffer is asked for more when they are used up |
| `#!cpp FILE*` | one character at a time, with the file locked once for the whole parse |
| `#!cpp FILE*` | with glibc and the Apple C library, the characters the `FILE` holds in its buffer are scanned in bulk like a stream's; elsewhere one character at a time; the file is locked once for the whole parse |
| other iterator ranges (e.g., `#!cpp std::list<char>`, `#!cpp std::istreambuf_iterator<char>`), wide strings | one character at a time |
Parsing a file from a `#!cpp std::ifstream` is therefore only about 10 to 20 % slower than reading the whole file into a
@@ -84,6 +86,9 @@ ahead: after parsing, it is positioned exactly as if every character had been re
[`operator>>`](../../api/operator_gtgt.md) can still read several values from one stream (see also
[JSON Lines](json_lines.md)).
This does not hold for [`json_document`](../json_view.md): it reads a stream into a buffer it owns, so the stream saves
no memory, and reading the file into a `#!cpp std::string` yourself and borrowing it is about 6 to 12 % faster.
Two macros switch these optimizations off without changing any result:
[`JSON_DISABLE_STREAM_BULK_SCAN`](../../api/macros/json_disable_stream_bulk_scan.md) for stream buffers that do not
follow the usual `std::streambuf` contract, and
docs/mkdocs/docs/features/performance.md
+5 -3
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@@ -27,8 +27,8 @@ A `#!cpp std::istream` (including `#!cpp std::ifstream`) gets the same bulk scan
characters its stream buffer already holds (the *get area*) and asks the stream buffer for more only when they are used
up. Nothing is read ahead, so the stream is left exactly where it would be after reading one character at a time, and
[`operator>>`](../api/operator_gtgt.md) can still read several values from one stream. A stream buffer without a get
area is read one character at a time. A `#!cpp FILE*` is still read one character at a time, but `file_input_adapter`
locks the file once per parse instead of once per character. See
area is read one character at a time. A `#!cpp FILE*` is locked once per parse instead of once per character, and with
glibc and the Apple C library, the characters in its buffer are scanned in bulk as a stream's get area is. See
[input sources and performance](parsing/index.md#input-sources-and-performance) for the full table. According to the
description of [#5828](https://github.com/nlohmann/json/pull/5828), parsing from a stream is within about 10 to 20 % of
parsing an equivalent `#!cpp std::string`.
@@ -39,7 +39,9 @@ iterator pair over non-contiguous but random-access storage (e.g. `#!cpp std::de
optimization but not the second, since the byte-scanning fast path requires contiguous storage.
Practically: a file can be passed directly to `parse`, which also avoids the memory for a copy of the file. Reading it
into a string first is no longer necessary for speed:
into a string first is no longer necessary for speed (this is for `#!cpp json::parse`; a
[`json_document`](json_view.md) reads a stream into an owned buffer anyway, so for it reading the file into a string
and borrowing that is the faster way):
```cpp
// fast: the stream buffer's get area is scanned in bulk
docs/mkdocs/docs/features/serialization.md
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@@ -17,6 +17,9 @@ To write a value directly to a stream (for example, a file or `#!cpp std::cout`)
std::cout << j << std::endl;
```
To write a file without leaving a truncated file behind when serialization fails, see
[Reading and writing files](files.md#writing-a-json-file).
!!! note "String, not raw value"
`dump` always returns a **JSON text**. Serializing a JSON string therefore includes the surrounding quotes and
docs/mkdocs/docs/home/blog/how_3_13_0_got_faster.md
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docs/mkdocs/docs/home/faq.md
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@@ -110,7 +110,7 @@ in the source files that need it, instantiate `basic_json` once, and consider pr
The parser did not see any character: the file was most likely not opened. A relative path is resolved against the
working directory of the running program, which is often the build directory of your IDE, not the source directory.
Check `is_open()` and try an absolute path. Other causes are an empty file and a stream that was already read. See
[`parse_error.101`](exceptions.md#jsonexceptionparse_error101).
[`parse_error.101`](exceptions.md#jsonexceptionparse_error101) and [Reading and writing files](../features/files.md).
### Input that arrives in chunks
docs/mkdocs/docs/images/compile_times.svg
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<text class="nj-jsonview-note" x="418" y="120" xml:space="preserve">double: 19.90 is gone</text>
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<title id="fig-jvli-title">The same J&#8203;SON text parsed by json_document::parse()</title>
<desc id="fig-jvli-title-d">The same text parsed by json_document::parse(): it keeps the 54 bytes of source text and builds a flat index of nine 16-byte nodes in document order: object, key port, unsigned integer 6379 (the converted value is in the node), key price, float, key tags, array, string eu, and an escaped string. Keys, the float, and the plain string point back into the source text; the escaped string points into the document&#x27;s buffer of decoded strings. A json_view is two pointers: one to the document and one to a node, here the array.</desc>
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<text class="nj-jsonview-h" x="16" y="262" xml:space="preserve">json_document::parse(): the source text stays where it is; one flat index of 16-byte nodes</text>
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<text class="nj-jsonview-note nj-jsonview-strong" x="30" y="602" xml:space="preserve">json_document: owns the node index and the buffer of decoded strings</text>
<text class="nj-jsonview-note" x="30" y="500" xml:space="preserve">node index: 9 nodes × 16 bytes = 144 bytes, in document order</text>
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<text class="nj-jsonview-mono nj-jsonview-sm" x="470" y="670" text-anchor="end" xml:space="preserve">json_view v = doc.root()[&quot;tags&quot;]</text>
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<text class="nj-jsonview-note" x="30" y="524" xml:space="preserve">integers are converted while parsing and kept in their node;</text>
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<svg class="nj-fig nj-jsonview " viewBox="0 0 840 222" role="img" aria-labelledby="fig-jvlt-title fig-jvlt-title-d" xmlns="http://www.w3.org/2000/svg">
<title id="fig-jvlt-title">A J&#8203;SON text parsed by basic_json::parse()</title>
<desc id="fig-jvlt-title-d">The text {&quot;port&quot;: 6379, &quot;price&quot;: 19.90, &quot;tags&quot;: [&quot;eu&quot;, &quot;a\&quot;b&quot;]} parsed by basic_json::parse(): the root json value points to a std::map whose three nodes are separate heap allocations; the price is stored as the double 19.9; the tags array is a std::vector of two json values, each pointing to its own std::string.</desc>
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<desc id="nj-blog-digits-d">The text 12345678 as one word. Masking gives the digit values 1 to 8, one per byte. Multiplying by 10 times 2 to the 8 plus 1 and shifting gives 12, 34, 56 and 78 in 16-bit lanes; multiplying by 100 times 2 to the 16 plus 1 gives 1234 and 5678 in 32-bit lanes; multiplying by 10000 times 2 to the 32 plus 1 gives 12345678.</desc>
<text class="fg-h" x="40" y="20">eight A&#8203;SCII digits in one 64-bit word (byte 0 is the lowest)</text>
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<text class="fg-h" x="40" y="112">&amp; 0x0F0F0F0F0F0F0F0F: one digit value per byte</text>
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<text class="fg-h" x="40" y="186">× (10 · 2⁸ + 1) &gt;&gt; 8, every second byte kept: two digits per 16 bits</text>
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<text class="fg-code" x="518.5" y="58" text-anchor="middle">l</text>
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<text class="fg-code" x="286" y="116" text-anchor="middle" style="font-size:14px">a = load 16 bytes at p</text>
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<text class="fg-code" x="348" y="146" text-anchor="middle" style="font-size:14px">b = load 16 bytes at p + n &#8722; 16</text>
<text class="fg-note fg-note--l" x="40" y="182">Both loads lie inside the string, and together they cover all of it; bytes 2 to 15 are in both.</text>
<text class="fg-note fg-note--l" x="40" y="204">Test a and b for a quote, a backslash, a control character or 0x7F: none, so write</text>
<text class="fg-code" x="40" y="234">store a at d, store b at d + n &#8722; 16</text>
<text class="fg-note fg-note--l" x="40" y="262">The second store writes bytes 2 to 15 again, with the same values. For any n from 16 to 32:</text>
<text class="fg-note fg-note--l" x="40" y="280">two loads, one test, two stores, no loop and no branch on the length.</text>
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<title id="nj-blog-overview">Speedup of 3.13.0 over 3.12.0 per workload, Apple M1 Max, Apple clang</title>
<desc id="nj-blog-overview-d">Horizontal bars of the speedup, more is better. twitter.json 3.5x; citm_catalog.json 5.1x; canada.json 4.1x; canada.json, indented 7.4x; citm, ordered_json 8.2x; twitter, std::ifstream 2.5x; citm, FILE* 15x; citm, accept() 14x; dump() twitter 6.6x; dump() canada 2.9x; dump(4) citm 4.6x; to_cbor() twitter 4.4x; twitter, memory 3.5x; twitter, FILE* 9.2x; diff() canada 10x; iterate canada 1.96x; copy + destroy citm 1.11x; == citm 1.01x.</desc>
<text class="nj-charts-panel" x="8" y="20">Parsing</text>
<text class="nj-charts-panel" x="8" y="244">Writing</text>
<text class="nj-charts-panel" x="8" y="372">Reading C&#8203;BOR</text>
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<text class="nj-charts-tick" x="210.625" y="576">1&#215;</text>
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<text class="nj-charts-tick" x="231.25" y="576">2&#215;</text>
<line class="nj-charts-grid" x1="251.875" y1="8" x2="251.875" y2="560"/>
<text class="nj-charts-tick" x="251.875" y="576">3&#215;</text>
<line class="nj-charts-grid" x1="272.5" y1="8" x2="272.5" y2="560"/>
<text class="nj-charts-tick" x="272.5" y="576">4&#215;</text>
<line class="nj-charts-grid" x1="293.125" y1="8" x2="293.125" y2="560"/>
<text class="nj-charts-tick" x="293.125" y="576">5&#215;</text>
<line class="nj-charts-grid" x1="313.75" y1="8" x2="313.75" y2="560"/>
<text class="nj-charts-tick" x="313.75" y="576">6&#215;</text>
<line class="nj-charts-grid" x1="334.375" y1="8" x2="334.375" y2="560"/>
<text class="nj-charts-tick" x="334.375" y="576">7&#215;</text>
<line class="nj-charts-grid" x1="355" y1="8" x2="355" y2="560"/>
<text class="nj-charts-tick" x="355" y="576">8&#215;</text>
<line class="nj-charts-grid" x1="375.625" y1="8" x2="375.625" y2="560"/>
<text class="nj-charts-tick" x="375.625" y="576">9&#215;</text>
<line class="nj-charts-grid" x1="396.25" y1="8" x2="396.25" y2="560"/>
<text class="nj-charts-tick" x="396.25" y="576">10&#215;</text>
<line class="nj-charts-grid" x1="416.875" y1="8" x2="416.875" y2="560"/>
<text class="nj-charts-tick" x="416.875" y="576">11&#215;</text>
<line class="nj-charts-grid" x1="437.5" y1="8" x2="437.5" y2="560"/>
<text class="nj-charts-tick" x="437.5" y="576">12&#215;</text>
<line class="nj-charts-grid" x1="458.125" y1="8" x2="458.125" y2="560"/>
<text class="nj-charts-tick" x="458.125" y="576">13&#215;</text>
<line class="nj-charts-grid" x1="478.75" y1="8" x2="478.75" y2="560"/>
<text class="nj-charts-tick" x="478.75" y="576">14&#215;</text>
<line class="nj-charts-grid" x1="499.375" y1="8" x2="499.375" y2="560"/>
<text class="nj-charts-tick" x="499.375" y="576">15&#215;</text>
<line class="nj-charts-grid" x1="520" y1="8" x2="520" y2="560"/>
<text class="nj-charts-tick" x="520" y="576">16&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="42" text-anchor="end">twitter.json</text>
<path class="nj-charts-c1" d="M190 30 H257.981 Q261.981 30 261.981 34 V41 Q261.981 45 257.981 45 H190 Z"><title>twitter.json: 3.5&#215;</title></path>
<text class="nj-charts-val" x="266.981" y="42">3.5&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="66" text-anchor="end">citm_catalog.json</text>
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<text class="nj-charts-val" x="300.394" y="66">5.1&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="90" text-anchor="end">canada.json</text>
<path class="nj-charts-c1" d="M190 78 H270.15 Q274.15 78 274.15 82 V89 Q274.15 93 270.15 93 H190 Z"><title>canada.json: 4.1&#215;</title></path>
<text class="nj-charts-val" x="279.15" y="90">4.1&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="114" text-anchor="end">canada.json, indented</text>
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<text class="nj-charts-val" x="347.831" y="114">7.4&#215;</text>
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<text class="nj-charts-val" x="363.712" y="138">8.2&#215;</text>
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<text class="nj-charts-val" x="245.738" y="162">2.5&#215;</text>
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<text class="nj-charts-val" x="503.137" y="186">15&#215;</text>
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<text class="nj-charts-val" x="476.738" y="210">14&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="266" text-anchor="end">dump() twitter</text>
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<text class="nj-charts-val" x="331.125" y="266">6.6&#215;</text>
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<text class="nj-charts-val" x="254.812" y="290">2.9&#215;</text>
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<text class="nj-charts-val" x="290.288" y="314">4.6&#215;</text>
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<text class="nj-charts-val" x="285.956" y="338">4.4&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="394" text-anchor="end">twitter, memory</text>
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<text class="nj-charts-val" x="267.6" y="394">3.5&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="418" text-anchor="end">twitter, FILE*</text>
<path class="nj-charts-c1" d="M190 406 H376.369 Q380.369 406 380.369 410 V417 Q380.369 421 376.369 421 H190 Z"><title>twitter, FILE*: 9.2&#215;</title></path>
<text class="nj-charts-val" x="385.369" y="418">9.2&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="474" text-anchor="end">diff() canada</text>
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<text class="nj-charts-val" x="410.325" y="474">10&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="498" text-anchor="end">iterate canada</text>
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<text class="nj-charts-val" x="235.425" y="498">1.96&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="522" text-anchor="end">copy + destroy citm</text>
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<text class="nj-charts-val" x="217.894" y="522">1.11&#215;</text>
<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="546" text-anchor="end">== citm</text>
<path class="nj-charts-c1" d="M190 534 H206.831 Q210.831 534 210.831 538 V545 Q210.831 549 206.831 549 H190 Z"><title>== citm: 1.01&#215;</title></path>
<text class="nj-charts-val" x="215.831" y="546">1.01&#215;</text>
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<line class="nj-charts-zero" x1="190" y1="8" x2="190" y2="560"/>
<text class="nj-charts-tick" x="355" y="594">speedup over 3.12.0 (3.12.0 = 1&#215;), more is better</text>
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<title id="nj-blog-price">Compile time of two programs with 3.13.0, alone, with a precompiled header and as a module, compared with 3.12.0</title>
<desc id="nj-blog-price-d">Horizontal bars of the change in compile time against 3.12.0, less is better. Apple clang 21, -O0 (debug), count_numbers, 3.13.0: +36%; Apple clang 21, -O0 (debug), count_numbers, 3.13.0, precompiled header: -23%; Apple clang 21, -O0 (debug), count_numbers, 3.13.0, module: -5%; Apple clang 21, -O0 (debug), server_config, 3.13.0: +36%; Apple clang 21, -O0 (debug), server_config, 3.13.0, precompiled header: -20%; Apple clang 21, -O0 (debug), server_config, 3.13.0, module: +8%; Apple clang 21, -O2, count_numbers, 3.13.0: +43%; Apple clang 21, -O2, count_numbers, 3.13.0, precompiled header: -1%; Apple clang 21, -O2, count_numbers, 3.13.0, module: +12%; Apple clang 21, -O2, server_config, 3.13.0: +42%; Apple clang 21, -O2, server_config, 3.13.0, precompiled header: +12%; Apple clang 21, -O2, server_config, 3.13.0, module: +22%; G&#8203;CC 16, -O0 (debug), count_numbers, 3.13.0: +68%; G&#8203;CC 16, -O0 (debug), count_numbers, 3.13.0, precompiled header: +12%; G&#8203;CC 16, -O0 (debug), count_numbers, 3.13.0, module: +13%; G&#8203;CC 16, -O0 (debug), server_config, 3.13.0: +50%; G&#8203;CC 16, -O0 (debug), server_config, 3.13.0, precompiled header: +15%; G&#8203;CC 16, -O0 (debug), server_config, 3.13.0, module: +16%; G&#8203;CC 16, -O2, count_numbers, 3.13.0: +60%; G&#8203;CC 16, -O2, count_numbers, 3.13.0, precompiled header: +28%; G&#8203;CC 16, -O2, count_numbers, 3.13.0, module: +27%; G&#8203;CC 16, -O2, server_config, 3.13.0: +52%; G&#8203;CC 16, -O2, server_config, 3.13.0, precompiled header: +29%; G&#8203;CC 16, -O2, server_config, 3.13.0, module: +31%.</desc>
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<text class="nj-charts-leg" x="115.2" y="16.5">3.13.0, precompiled header</text>
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<text class="nj-charts-leg" x="368.4" y="16.5">3.13.0, module</text>
<text class="nj-charts-tick" x="320.833" y="46">as fast as 3.12.0</text>
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<text class="nj-charts-val" x="448.833" y="87.5">+36%</text>
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<text class="nj-charts-val" x="298.75" y="115.5" text-anchor="end">&#8722;5%</text>
<text class="nj-charts-rowlabel nj-charts-code" x="142" y="150" text-anchor="end">server_config</text>
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<text class="nj-charts-val" x="247.5" y="150.5" text-anchor="end">&#8722;20%</text>
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<text class="nj-charts-val" x="353.167" y="164.5">+8%</text>
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<line class="nj-charts-grid" x1="457.5" y1="204" x2="457.5" y2="300"/>
<line class="nj-charts-grid" x1="525.833" y1="204" x2="525.833" y2="300"/>
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<text class="nj-charts-val" x="472.75" y="217.5">+43%</text>
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<text class="nj-charts-val" x="312.417" y="231.5" text-anchor="end">&#8722;1%</text>
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<text class="nj-charts-val" x="366.833" y="245.5">+12%</text>
<text class="nj-charts-rowlabel nj-charts-code" x="142" y="280" text-anchor="end">server_config</text>
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<text class="nj-charts-val" x="469.333" y="266.5">+42%</text>
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<text class="nj-charts-val" x="366.833" y="280.5">+12%</text>
<path class="nj-charts-c3" d="M320.833 285 H392 Q396 285 396 289 V292 Q396 296 392 296 H320.833 Z"><title>server_config, Apple clang 21, -O2, 3.13.0, module: 1,926 ms against 1,584 ms with 3.12.0 (+22%)</title></path>
<text class="nj-charts-val" x="401" y="294.5">+22%</text>
<text class="nj-charts-panel" x="8" y="328">G&#8203;CC 16, -O0 (debug)</text>
<line class="nj-charts-grid" x1="184.167" y1="334" x2="184.167" y2="430"/>
<line class="nj-charts-grid" x1="252.5" y1="334" x2="252.5" y2="430"/>
<line class="nj-charts-grid" x1="389.167" y1="334" x2="389.167" y2="430"/>
<line class="nj-charts-grid" x1="457.5" y1="334" x2="457.5" y2="430"/>
<line class="nj-charts-grid" x1="525.833" y1="334" x2="525.833" y2="430"/>
<text class="nj-charts-rowlabel nj-charts-code" x="142" y="361" text-anchor="end">count_numbers</text>
<path class="nj-charts-c2" d="M320.833 338 H549.167 Q553.167 338 553.167 342 V345 Q553.167 349 549.167 349 H320.833 Z"><title>count_numbers, G&#8203;CC 16, -O0 (debug), 3.13.0: 2,385 ms against 1,416 ms with 3.12.0 (+68%)</title></path>
<text class="nj-charts-val" x="558.167" y="347.5">+68%</text>
<path class="nj-charts-c1" d="M320.833 352 H357.833 Q361.833 352 361.833 356 V359 Q361.833 363 357.833 363 H320.833 Z"><title>count_numbers, G&#8203;CC 16, -O0 (debug), 3.13.0, precompiled header: 1,593 ms against 1,416 ms with 3.12.0 (+12%)</title></path>
<text class="nj-charts-val" x="366.833" y="361.5">+12%</text>
<path class="nj-charts-c3" d="M320.833 366 H361.25 Q365.25 366 365.25 370 V373 Q365.25 377 361.25 377 H320.833 Z"><title>count_numbers, G&#8203;CC 16, -O0 (debug), 3.13.0, module: 1,604 ms against 1,416 ms with 3.12.0 (+13%)</title></path>
<text class="nj-charts-val" x="370.25" y="375.5">+13%</text>
<text class="nj-charts-rowlabel nj-charts-code" x="142" y="410" text-anchor="end">server_config</text>
<path class="nj-charts-c2" d="M320.833 387 H487.667 Q491.667 387 491.667 391 V394 Q491.667 398 487.667 398 H320.833 Z"><title>server_config, G&#8203;CC 16, -O0 (debug), 3.13.0: 2,820 ms against 1,878 ms with 3.12.0 (+50%)</title></path>
<text class="nj-charts-val" x="496.667" y="396.5">+50%</text>
<path class="nj-charts-c1" d="M320.833 401 H368.083 Q372.083 401 372.083 405 V408 Q372.083 412 368.083 412 H320.833 Z"><title>server_config, G&#8203;CC 16, -O0 (debug), 3.13.0, precompiled header: 2,152 ms against 1,878 ms with 3.12.0 (+15%)</title></path>
<text class="nj-charts-val" x="377.083" y="410.5">+15%</text>
<path class="nj-charts-c3" d="M320.833 415 H371.5 Q375.5 415 375.5 419 V422 Q375.5 426 371.5 426 H320.833 Z"><title>server_config, G&#8203;CC 16, -O0 (debug), 3.13.0, module: 2,180 ms against 1,878 ms with 3.12.0 (+16%)</title></path>
<text class="nj-charts-val" x="380.5" y="424.5">+16%</text>
<text class="nj-charts-panel" x="8" y="458">G&#8203;CC 16, -O2</text>
<line class="nj-charts-grid" x1="184.167" y1="464" x2="184.167" y2="560"/>
<line class="nj-charts-grid" x1="252.5" y1="464" x2="252.5" y2="560"/>
<line class="nj-charts-grid" x1="389.167" y1="464" x2="389.167" y2="560"/>
<line class="nj-charts-grid" x1="457.5" y1="464" x2="457.5" y2="560"/>
<line class="nj-charts-grid" x1="525.833" y1="464" x2="525.833" y2="560"/>
<text class="nj-charts-rowlabel nj-charts-code" x="142" y="491" text-anchor="end">count_numbers</text>
<path class="nj-charts-c2" d="M320.833 468 H521.833 Q525.833 468 525.833 472 V475 Q525.833 479 521.833 479 H320.833 Z"><title>count_numbers, G&#8203;CC 16, -O2, 3.13.0: 3,464 ms against 2,159 ms with 3.12.0 (+60%)</title></path>
<text class="nj-charts-val" x="530.833" y="477.5">+60%</text>
<path class="nj-charts-c1" d="M320.833 482 H412.5 Q416.5 482 416.5 486 V489 Q416.5 493 412.5 493 H320.833 Z"><title>count_numbers, G&#8203;CC 16, -O2, 3.13.0, precompiled header: 2,765 ms against 2,159 ms with 3.12.0 (+28%)</title></path>
<text class="nj-charts-val" x="421.5" y="491.5">+28%</text>
<path class="nj-charts-c3" d="M320.833 496 H409.083 Q413.083 496 413.083 500 V503 Q413.083 507 409.083 507 H320.833 Z"><title>count_numbers, G&#8203;CC 16, -O2, 3.13.0, module: 2,740 ms against 2,159 ms with 3.12.0 (+27%)</title></path>
<text class="nj-charts-val" x="418.083" y="505.5">+27%</text>
<text class="nj-charts-rowlabel nj-charts-code" x="142" y="540" text-anchor="end">server_config</text>
<path class="nj-charts-c2" d="M320.833 517 H494.5 Q498.5 517 498.5 521 V524 Q498.5 528 494.5 528 H320.833 Z"><title>server_config, G&#8203;CC 16, -O2, 3.13.0: 4,388 ms against 2,878 ms with 3.12.0 (+52%)</title></path>
<text class="nj-charts-val" x="503.5" y="526.5">+52%</text>
<path class="nj-charts-c1" d="M320.833 531 H415.917 Q419.917 531 419.917 535 V538 Q419.917 542 415.917 542 H320.833 Z"><title>server_config, G&#8203;CC 16, -O2, 3.13.0, precompiled header: 3,722 ms against 2,878 ms with 3.12.0 (+29%)</title></path>
<text class="nj-charts-val" x="424.917" y="540.5">+29%</text>
<path class="nj-charts-c3" d="M320.833 545 H422.75 Q426.75 545 426.75 549 V552 Q426.75 556 422.75 556 H320.833 Z"><title>server_config, G&#8203;CC 16, -O2, 3.13.0, module: 3,774 ms against 2,878 ms with 3.12.0 (+31%)</title></path>
<text class="nj-charts-val" x="431.75" y="554.5">+31%</text>
<line class="nj-charts-ref" x1="320.833" y1="52" x2="320.833" y2="574"/>
<text class="nj-charts-tick" x="184.167" y="590">&#8722;40%</text>
<text class="nj-charts-tick" x="252.5" y="590">&#8722;20%</text>
<text class="nj-charts-tick" x="320.833" y="590">0</text>
<text class="nj-charts-tick" x="389.167" y="590">+20%</text>
<text class="nj-charts-tick" x="457.5" y="590">+40%</text>
<text class="nj-charts-tick" x="525.833" y="590">+60%</text>
<text class="nj-charts-tick" x="355" y="608">compile time compared with 3.12.0, less is better</text>
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docs/mkdocs/docs/images/perf_blog_swar.svg
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<svg class="nj-fig nj-charts nj-charts--swar" viewBox="0 0 640 312" role="img" aria-labelledby="nj-blog-swar nj-blog-swar-d" xmlns="http://www.w3.org/2000/svg">
<title id="nj-blog-swar">Finding the end of a run of ordinary string characters eight bytes at a time</title>
<desc id="nj-blog-swar-d">The eight bytes w, i, t, t, e, r, quote and comma are loaded as one word. The test sets the high bit only in byte 6, the quote. Counting trailing zero bits gives 55, divided by eight gives 6: bytes 0 to 5 are copied at once, then the quote ends the string.</desc>
<text class="fg-h" x="40" y="20">eight input bytes, loaded as one 64-bit word (byte 0 is the lowest)</text>
<rect class="fg-cell" x="40" y="34" width="64" height="40" rx="4"/>
<text class="fg-code" x="72" y="60" text-anchor="middle">w</text>
<text class="nj-charts-tick" x="72" y="92">0x77</text>
<text class="nj-charts-tick" x="72" y="108">byte 0</text>
<rect class="fg-cell" x="110" y="34" width="64" height="40" rx="4"/>
<text class="fg-code" x="142" y="60" text-anchor="middle">i</text>
<text class="nj-charts-tick" x="142" y="92">0x69</text>
<text class="nj-charts-tick" x="142" y="108">byte 1</text>
<rect class="fg-cell" x="180" y="34" width="64" height="40" rx="4"/>
<text class="fg-code" x="212" y="60" text-anchor="middle">t</text>
<text class="nj-charts-tick" x="212" y="92">0x74</text>
<text class="nj-charts-tick" x="212" y="108">byte 2</text>
<rect class="fg-cell" x="250" y="34" width="64" height="40" rx="4"/>
<text class="fg-code" x="282" y="60" text-anchor="middle">t</text>
<text class="nj-charts-tick" x="282" y="92">0x74</text>
<text class="nj-charts-tick" x="282" y="108">byte 3</text>
<rect class="fg-cell" x="320" y="34" width="64" height="40" rx="4"/>
<text class="fg-code" x="352" y="60" text-anchor="middle">e</text>
<text class="nj-charts-tick" x="352" y="92">0x65</text>
<text class="nj-charts-tick" x="352" y="108">byte 4</text>
<rect class="fg-cell" x="390" y="34" width="64" height="40" rx="4"/>
<text class="fg-code" x="422" y="60" text-anchor="middle">r</text>
<text class="nj-charts-tick" x="422" y="92">0x72</text>
<text class="nj-charts-tick" x="422" y="108">byte 5</text>
<rect class="fg-cell" x="460" y="34" width="64" height="40" rx="4"/>
<rect class="nj-charts-c2" fill-opacity=".25" x="460" y="34" width="64" height="40" rx="4"/>
<text class="fg-code" x="492" y="60" text-anchor="middle">&quot;</text>
<text class="nj-charts-tick" x="492" y="92">0x22</text>
<text class="nj-charts-tick" x="492" y="108">byte 6</text>
<rect class="fg-cell" x="530" y="34" width="64" height="40" rx="4"/>
<text class="fg-code" x="562" y="60" text-anchor="middle">,</text>
<text class="nj-charts-tick" x="562" y="92">0x2C</text>
<text class="nj-charts-tick" x="562" y="108">byte 7</text>
<text class="fg-h" x="40" y="132">swar_string_special(): the high bit of each byte that needs handling</text>
<rect class="fg-cell" x="40" y="146" width="64" height="34" rx="4"/>
<text class="fg-code" x="72" y="169" text-anchor="middle">0x00</text>
<rect class="fg-cell" x="110" y="146" width="64" height="34" rx="4"/>
<text class="fg-code" x="142" y="169" text-anchor="middle">0x00</text>
<rect class="fg-cell" x="180" y="146" width="64" height="34" rx="4"/>
<text class="fg-code" x="212" y="169" text-anchor="middle">0x00</text>
<rect class="fg-cell" x="250" y="146" width="64" height="34" rx="4"/>
<text class="fg-code" x="282" y="169" text-anchor="middle">0x00</text>
<rect class="fg-cell" x="320" y="146" width="64" height="34" rx="4"/>
<text class="fg-code" x="352" y="169" text-anchor="middle">0x00</text>
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<text class="fg-code" x="422" y="169" text-anchor="middle">0x00</text>
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<rect class="nj-charts-c2" fill-opacity=".25" x="460" y="146" width="64" height="34" rx="4"/>
<text class="fg-code" x="492" y="169" text-anchor="middle">0x80</text>
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<text class="fg-code" x="562" y="169" text-anchor="middle">0x00</text>
<text class="fg-code" x="40" y="216">count_trailing_zeros(0x0080000000000000) = 55</text>
<text class="fg-code" x="40" y="242">55 / 8 = 6: copy bytes 0 to 5 in one go, then handle the quote</text>
<text class="fg-note fg-note--l" x="40" y="272">No branch per byte: a few subtractions, ANDs and ORs per word,</text>
<text class="fg-note fg-note--l" x="40" y="290">then one count of trailing zeros.</text>
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docs/mkdocs/docs/images/perf_blog_timeline_accept_twitter.svg
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<title id="nj-blog-tl-accept_twitter">accept() twitter.json: speedup over 3.12.0 by commit</title>
<desc id="nj-blog-tl-accept_twitter-d">accept() twitter.json: speedup over 3.12.0 at each of 360 commits, ending at 10x. Labeled steps, by theme: 4, 1, 4, 4, 2, 2, 1.</desc>
<text class="nj-charts-panel" x="8" y="18">accept() twitter.json</text>
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<text class="nj-charts-tick nj-charts-tick--r" x="38" y="212">1&#215;</text>
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<text class="nj-charts-tick nj-charts-tick--r" x="38" y="176.5">2&#215;</text>
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<text class="nj-charts-tick nj-charts-tick--r" x="38" y="141">4&#215;</text>
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<text class="nj-charts-tick nj-charts-tick--r" x="38" y="105.5">8&#215;</text>
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<text class="nj-charts-tick nj-charts-tick--r" x="38" y="70">16&#215;</text>
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<text class="nj-charts-tick" x="44" y="225">3.12.0</text>
<line class="nj-charts-axis" x1="116.496" y1="208" x2="116.496" y2="212"/>
<text class="nj-charts-tick" x="116.496" y="225">Sep 2026</text>
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<text class="nj-charts-tick" x="195.365" y="225">Oct</text>
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<text class="nj-charts-tick" x="302.117" y="225">Nov</text>
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<text class="nj-charts-note" x="8" y="262">speedup over 3.12.0 (log scale), more is better</text>
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docs/mkdocs/docs/images/perf_blog_timeline_dump_canada.svg
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<title id="nj-blog-tl-dump_canada">dump() canada.json: speedup over 3.12.0 by commit</title>
<desc id="nj-blog-tl-dump_canada-d">dump() canada.json: speedup over 3.12.0 at each of 360 commits, ending at 3.2x. Labeled steps, by theme: 6, 3.</desc>
<text class="nj-charts-panel" x="8" y="18">dump() canada.json</text>
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<text class="nj-charts-tick" x="44" y="225">3.12.0</text>
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<text class="nj-charts-note" x="8" y="262">speedup over 3.12.0 (log scale), more is better</text>
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docs/mkdocs/docs/images/perf_blog_timeline_dump_twitter.svg
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<title id="nj-blog-tl-dump_twitter">dump() twitter.json: speedup over 3.12.0 by commit</title>
<desc id="nj-blog-tl-dump_twitter-d">dump() twitter.json: speedup over 3.12.0 at each of 360 commits, ending at 6.8x. Labeled steps, by theme: 6, 2, 2, 2.</desc>
<text class="nj-charts-panel" x="8" y="18">dump() twitter.json</text>
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<title id="nj-blog-tl-from_cbor_twitter">from_cbor() twitter: speedup over 3.12.0 by commit</title>
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<text class="nj-charts-note" x="8" y="262">speedup over 3.12.0 (log scale), more is better</text>
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<title id="nj-blog-tl-parse_twitter_ifstream">parse() twitter.json, std::ifstream: speedup over 3.12.0 by commit</title>
<desc id="nj-blog-tl-parse_twitter_ifstream-d">parse() twitter.json, std::ifstream: speedup over 3.12.0 at each of 360 commits, ending at 2.2x. Labeled steps, by theme: 1, 1.</desc>
<text class="nj-charts-panel" x="8" y="18">parse() twitter.json, std::ifstream</text>
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<text class="nj-charts-tick nj-charts-tick--r" x="38" y="141">2&#215;</text>
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<text class="nj-charts-tick nj-charts-tick--r" x="38" y="70">4&#215;</text>
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<text class="nj-charts-tick" x="44" y="225">3.12.0</text>
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<text class="nj-charts-tick" x="116.496" y="225">Sep 2026</text>
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<text class="nj-charts-note" x="8" y="262">speedup over 3.12.0 (log scale), more is better</text>
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docs/mkdocs/docs/images/perf_blog_timeline_to_cbor_twitter.svg
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<title id="nj-blog-tl-to_cbor_twitter">to_cbor() twitter: speedup over 3.12.0 by commit</title>
<desc id="nj-blog-tl-to_cbor_twitter-d">to_cbor() twitter: speedup over 3.12.0 at each of 360 commits, ending at 5.1x. Labeled steps, by theme: 4, 6, 6.</desc>
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<text class="nj-charts-tick" x="44" y="225">3.12.0</text>
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<text class="nj-charts-note" x="8" y="262">speedup over 3.12.0 (log scale), more is better</text>
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<title id="nj-blog-uc-mac">Use cases: time of each library relative to the fastest, Apple M1 Max</title>
<desc id="nj-blog-uc-mac-d">Table of relative times, libraries by use case. nlohmann/json json_document validate: 1.00; nlohmann/json json_document sum: 1.00; nlohmann/json json_document select: 1.00; nlohmann/json json_document edit: 1.00 (0.85 doing less, N); nlohmann/json json_document minify: 1.00 (0.84 doing less, N); nlohmann/json json_document write: 1.00 (0.69 doing less, N); yyjson validate: 1.41; yyjson sum: 1.14; yyjson select: 1.30; yyjson edit: 1.48; yyjson minify: 1.26 (1.18 doing less, N); yyjson write: 1.23; simdjson validate: 1.52; simdjson sum: 1.21; simdjson select: 1.34 (0.76 doing less, P); simdjson edit: n/a; simdjson minify: 1.73 (0.18 doing less, P); simdjson write: 2.41; sonic-rs (Rust) validate: 1.91; sonic-rs (Rust) sum: 1.54; sonic-rs (Rust) select: 1.85; sonic-rs (Rust) edit: 2.10; sonic-rs (Rust) minify: 1.93; sonic-rs (Rust) write: 2.34; sonic-cpp validate: no fully validating way (2.50 doing less, U); sonic-cpp sum: no fully validating way (1.86 doing less, U); sonic-cpp select: no fully validating way (2.34 doing less, U); sonic-cpp edit: no fully validating way (1.70 doing less, U); sonic-cpp minify: no fully validating way (2.03 doing less, U); sonic-cpp write: 1.61; simd-json (Rust) validate: 2.05; simd-json (Rust) sum: 1.63; simd-json (Rust) select: 2.39; simd-json (Rust) edit: 2.85; simd-json (Rust) minify: 3.40; simd-json (Rust) write: 3.05; nlohmann/json json validate: 1.38; nlohmann/json json sum: 1.34; nlohmann/json json select: 6.09; nlohmann/json json edit: 3.22; nlohmann/json json minify: 4.39; nlohmann/json json write: 2.03; Glaze validate: 2.03; Glaze sum: 3.88; Glaze select: 1.81 (0.81 doing less, P); Glaze edit: 4.44; Glaze minify: 5.23 (1.05 doing less, P); Glaze write: 2.19; Boost.J&#8203;SON validate: 2.54; Boost.J&#8203;SON sum: 2.02; Boost.J&#8203;SON select: 3.31; Boost.J&#8203;SON edit: 3.23; Boost.J&#8203;SON minify: 3.89; Boost.J&#8203;SON write: 3.67; serde_json (Rust) validate: 2.44 (2.21 doing less, U); serde_json (Rust) sum: 2.60; serde_json (Rust) select: 2.41 (2.26 doing less, U); serde_json (Rust) edit: 5.02; serde_json (Rust) minify: 5.85; serde_json (Rust) write: 2.90; RapidJSON validate: 4.67 (3.09 doing less, U); RapidJSON sum: 4.18 (2.89 doing less, U); RapidJSON select: 6.02 (3.93 doing less, U); RapidJSON edit: 4.85 (3.83 doing less, U); RapidJSON minify: 4.85 (3.66 doing less, U N); RapidJSON write: 5.74.</desc>
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<rect class="nj-heat-1" x="593" y="81" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="102" text-anchor="middle">1.26</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · minify, checking less&#10;1.18× the time of the fastest fully validating library&#10;twitter.json: 298 µs · insitu (copy) + write (validates fully)&#10;citm_catalog.json: 642 µs · read + write (validates fully)&#10;canada.json: 2,523 µs · read (raw numbers) + write (validates fully)&#10;jeopardy.json: 51,001 µs · read + write (validates fully)&#10;copies each number&#x27;s text instead of formatting it (YYJSON_READ_NUMBER_AS_RAW)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-1" x="639" y="81" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="96" text-anchor="middle">1.18</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="109" text-anchor="middle">N</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · write&#10;1.23× the time of the fastest library (fully validating)&#10;way: write&#10;twitter.json: 101 µs&#10;citm_catalog.json: 167 µs&#10;canada.json: 1,719 µs&#10;jeopardy.json: 19,937 µs">
<rect class="nj-heat-1" x="685" y="81" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="102" text-anchor="middle">1.23</text>
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<text class="nj-charts-rowlabel " x="216" y="138" text-anchor="end">simdjson</text>
<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · validate&#10;1.52× the time of the fastest library (fully validating)&#10;way: D&#8203;OM&#10;twitter.json: 215 µs&#10;citm_catalog.json: 460 µs&#10;canada.json: 1,890 µs&#10;jeopardy.json: 28,890 µs">
<rect class="nj-heat-2" x="225" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="138" text-anchor="middle">1.52</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · sum&#10;1.21× the time of the fastest library (fully validating)&#10;twitter.json: 249 µs · D&#8203;OM&#10;citm_catalog.json: 572 µs · On-Demand&#10;canada.json: 2,398 µs · On-Demand&#10;jeopardy.json: 34,994 µs · D&#8203;OM">
<rect class="nj-heat-1" x="317" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="138" text-anchor="middle">1.21</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · select&#10;1.34× the time of the fastest library (fully validating)&#10;way: D&#8203;OM&#10;twitter.json: 192 µs&#10;citm_catalog.json: 454 µs&#10;canada.json: 1,893 µs&#10;jeopardy.json: 30,714 µs">
<rect class="nj-heat-1" x="409" y="117" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="138" text-anchor="middle">1.34</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · select, checking less&#10;0.76× the time of the fastest fully validating library&#10;twitter.json: 128 µs · On-Demand structs&#10;citm_catalog.json: 356 µs · On-Demand&#10;canada.json: 571 µs · On-Demand&#10;jeopardy.json: 19,633 µs · On-Demand&#10;reads lazily: On-Demand reads only what you ask for and steps over the rest by matching brackets">
<rect class="nj-heat-0" x="455" y="117" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="132" text-anchor="middle">0.76</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="145" text-anchor="middle">P</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · edit&#10;simdjson&#x27;s documents are read-only: it has no A&#8203;PI to change a value and write the result">
<rect class="nj-heat-na" x="501" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-tick" x="546" y="138">n/a</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · minify&#10;1.73× the time of the fastest library (fully validating)&#10;way: D&#8203;OM + to_string&#10;twitter.json: 425 µs&#10;citm_catalog.json: 850 µs&#10;canada.json: 5,094 µs&#10;jeopardy.json: 61,202 µs">
<rect class="nj-heat-2" x="593" y="117" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="138" text-anchor="middle">1.73</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · minify, checking less&#10;0.18× the time of the fastest fully validating library&#10;way: minify&#10;twitter.json: 62.5 µs&#10;citm_catalog.json: 168 µs&#10;canada.json: 227 µs&#10;jeopardy.json: 5,756 µs&#10;simdjson::minify() only removes whitespace, without parsing the values">
<rect class="nj-heat-0" x="639" y="117" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="132" text-anchor="middle">0.18</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="145" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · write&#10;2.41× the time of the fastest library (fully validating)&#10;way: to_string&#10;twitter.json: 201 µs&#10;citm_catalog.json: 416 µs&#10;canada.json: 3,186 µs&#10;jeopardy.json: 32,185 µs">
<rect class="nj-heat-2" x="685" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="138" text-anchor="middle">2.41</text>
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<text class="nj-charts-rowlabel " x="216" y="174" text-anchor="end">sonic-rs (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · validate&#10;1.91× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 326 µs&#10;citm_catalog.json: 681 µs&#10;canada.json: 1,939 µs&#10;jeopardy.json: 31,450 µs">
<rect class="nj-heat-2" x="225" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="174" text-anchor="middle">1.91</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · sum&#10;1.54× the time of the fastest library (fully validating)&#10;way: visitor&#10;twitter.json: 364 µs&#10;citm_catalog.json: 778 µs&#10;canada.json: 2,703 µs&#10;jeopardy.json: 41,361 µs">
<rect class="nj-heat-2" x="317" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="174" text-anchor="middle">1.54</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · select&#10;1.85× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 333 µs&#10;citm_catalog.json: 691 µs&#10;canada.json: 1,936 µs&#10;jeopardy.json: 40,660 µs">
<rect class="nj-heat-2" x="409" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="174" text-anchor="middle">1.85</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · edit&#10;2.10× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 634 µs&#10;citm_catalog.json: 1,257 µs&#10;canada.json: 4,396 µs&#10;jeopardy.json: 140,936 µs">
<rect class="nj-heat-2" x="501" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="174" text-anchor="middle">2.10</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · minify&#10;1.93× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 535 µs&#10;citm_catalog.json: 1,134 µs&#10;canada.json: 4,377 µs&#10;jeopardy.json: 64,832 µs">
<rect class="nj-heat-2" x="593" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="174" text-anchor="middle">1.93</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · write&#10;2.34× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 212 µs&#10;citm_catalog.json: 446 µs&#10;canada.json: 2,419 µs&#10;jeopardy.json: 33,366 µs">
<rect class="nj-heat-2" x="685" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="174" text-anchor="middle">2.34</text>
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<text class="nj-charts-rowlabel " x="216" y="210" text-anchor="end">sonic-cpp</text>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · validate, checking less&#10;2.50× the time of the fastest fully validating library&#10;way: Document&#10;twitter.json: 382 µs&#10;citm_catalog.json: 985 µs&#10;canada.json: 2,579 µs&#10;jeopardy.json: 40,996 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-2" x="225" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="204" text-anchor="middle">2.50</text>
<text class="nj-charts-cell nj-charts-cell--small" x="270" y="217" text-anchor="middle">U</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · sum, checking less&#10;1.86× the time of the fastest fully validating library&#10;way: Document&#10;twitter.json: 428 µs&#10;citm_catalog.json: 1,098 µs&#10;canada.json: 2,975 µs&#10;jeopardy.json: 48,487 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-2" x="317" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="204" text-anchor="middle">1.86</text>
<text class="nj-charts-cell nj-charts-cell--small" x="362" y="217" text-anchor="middle">U</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · select, checking less&#10;2.34× the time of the fastest fully validating library&#10;way: Document&#10;twitter.json: 385 µs&#10;citm_catalog.json: 993 µs&#10;canada.json: 2,611 µs&#10;jeopardy.json: 46,356 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-2" x="409" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="204" text-anchor="middle">2.34</text>
<text class="nj-charts-cell nj-charts-cell--small" x="454" y="217" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · edit, checking less&#10;1.70× the time of the fastest fully validating library&#10;way: Document&#10;twitter.json: 488 µs&#10;citm_catalog.json: 1,218 µs&#10;canada.json: 5,662 µs&#10;jeopardy.json: 63,697 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-2" x="501" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="204" text-anchor="middle">1.70</text>
<text class="nj-charts-cell nj-charts-cell--small" x="546" y="217" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · minify, checking less&#10;2.03× the time of the fastest fully validating library&#10;way: Document + Serialize&#10;twitter.json: 504 µs&#10;citm_catalog.json: 1,217 µs&#10;canada.json: 5,634 µs&#10;jeopardy.json: 61,988 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-2" x="593" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="204" text-anchor="middle">2.03</text>
<text class="nj-charts-cell nj-charts-cell--small" x="638" y="217" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · write&#10;1.61× the time of the fastest library (fully validating)&#10;way: Serialize&#10;twitter.json: 114 µs&#10;citm_catalog.json: 240 µs&#10;canada.json: 3,109 µs&#10;jeopardy.json: 20,327 µs">
<rect class="nj-heat-2" x="685" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="210" text-anchor="middle">1.61</text>
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<text class="nj-charts-rowlabel " x="216" y="246" text-anchor="end">simd-json (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · validate&#10;2.05× the time of the fastest library (fully validating)&#10;way: tape (copy)&#10;twitter.json: 289 µs&#10;citm_catalog.json: 698 µs&#10;canada.json: 2,278 µs&#10;jeopardy.json: 38,874 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="225" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="246" text-anchor="middle">2.05</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · sum&#10;1.63× the time of the fastest library (fully validating)&#10;way: visitor (copy)&#10;twitter.json: 354 µs&#10;citm_catalog.json: 866 µs&#10;canada.json: 2,717 µs&#10;jeopardy.json: 47,518 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="317" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="246" text-anchor="middle">1.63</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · select&#10;2.39× the time of the fastest library (fully validating)&#10;way: structs (copy)&#10;twitter.json: 364 µs&#10;citm_catalog.json: 914 µs&#10;canada.json: 2,657 µs&#10;jeopardy.json: 57,697 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="409" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="246" text-anchor="middle">2.39</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · edit&#10;2.85× the time of the fastest library (fully validating)&#10;way: borrowed (copy)&#10;twitter.json: 948 µs&#10;citm_catalog.json: 2,102 µs&#10;canada.json: 7,654 µs&#10;jeopardy.json: 110,693 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="501" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="246" text-anchor="middle">2.85</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · minify&#10;3.40× the time of the fastest library (fully validating)&#10;way: borrowed (copy)&#10;twitter.json: 952 µs&#10;citm_catalog.json: 2,111 µs&#10;canada.json: 7,658 µs&#10;jeopardy.json: 108,130 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="593" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="246" text-anchor="middle">3.40</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · write&#10;3.05× the time of the fastest library (fully validating)&#10;way: borrowed&#10;twitter.json: 355 µs&#10;citm_catalog.json: 478 µs&#10;canada.json: 2,728 µs&#10;jeopardy.json: 47,412 µs">
<rect class="nj-heat-3" x="685" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="246" text-anchor="middle">3.05</text>
</g>
<text class="nj-charts-rowlabel nj-charts-name-json" x="216" y="282" text-anchor="end">nlohmann/json json</text>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · validate&#10;1.38× the time of the fastest library (fully validating)&#10;way: accept&#10;twitter.json: 234 µs&#10;citm_catalog.json: 456 µs&#10;canada.json: 1,253 µs&#10;jeopardy.json: 27,563 µs">
<rect class="nj-heat-1" x="225" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="282" text-anchor="middle">1.38</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · sum&#10;1.34× the time of the fastest library (fully validating)&#10;way: sax&#10;twitter.json: 303 µs&#10;citm_catalog.json: 602 µs&#10;canada.json: 2,208 µs&#10;jeopardy.json: 44,688 µs">
<rect class="nj-heat-1" x="317" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="282" text-anchor="middle">1.34</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · select&#10;6.09× the time of the fastest library (fully validating)&#10;way: parse&#10;twitter.json: 1,208 µs&#10;citm_catalog.json: 2,128 µs&#10;canada.json: 5,088 µs&#10;jeopardy.json: 163,712 µs">
<rect class="nj-heat-4" x="409" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="282" text-anchor="middle">6.09</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · edit&#10;3.22× the time of the fastest library (fully validating)&#10;twitter.json: 1,115 µs · ordered_json&#10;citm_catalog.json: 2,065 µs · ordered_json&#10;canada.json: 7,348 µs · parse&#10;jeopardy.json: 162,216 µs · ordered_json">
<rect class="nj-heat-3" x="501" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="282" text-anchor="middle">3.22</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · minify&#10;4.39× the time of the fastest library (fully validating)&#10;way: parse + dump&#10;twitter.json: 1,446 µs&#10;citm_catalog.json: 2,406 µs&#10;canada.json: 7,328 µs&#10;jeopardy.json: 182,132 µs">
<rect class="nj-heat-3" x="593" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="282" text-anchor="middle">4.39</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · write&#10;2.03× the time of the fastest library (fully validating)&#10;way: dump&#10;twitter.json: 216 µs&#10;citm_catalog.json: 287 µs&#10;canada.json: 2,274 µs&#10;jeopardy.json: 30,928 µs">
<rect class="nj-heat-2" x="685" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="282" text-anchor="middle">2.03</text>
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<text class="nj-charts-rowlabel " x="216" y="318" text-anchor="end">Glaze</text>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · validate&#10;2.03× the time of the fastest library (fully validating)&#10;way: validate_json&#10;twitter.json: 333 µs&#10;citm_catalog.json: 854 µs&#10;canada.json: 1,302 µs&#10;jeopardy.json: 46,251 µs">
<rect class="nj-heat-2" x="225" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="318" text-anchor="middle">2.03</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · sum&#10;3.88× the time of the fastest library (fully validating)&#10;way: generic (double, strict)&#10;twitter.json: 974 µs&#10;citm_catalog.json: 2,057 µs&#10;canada.json: 6,338 µs&#10;jeopardy.json: 100,272 µs">
<rect class="nj-heat-3" x="317" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="318" text-anchor="middle">3.88</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · select&#10;1.81× the time of the fastest library (fully validating)&#10;way: structs (validate_skipped)&#10;twitter.json: 314 µs&#10;citm_catalog.json: 852 µs&#10;canada.json: 1,303 µs&#10;jeopardy.json: 47,692 µs">
<rect class="nj-heat-2" x="409" y="297" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="318" text-anchor="middle">1.81</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · select, checking less&#10;0.81× the time of the fastest fully validating library&#10;way: structs&#10;twitter.json: 238 µs&#10;citm_catalog.json: 253 µs&#10;canada.json: 310 µs&#10;jeopardy.json: 36,013 µs&#10;reads into structs and steps over fields it doesn&#x27;t know without checking them (validate_skipped checks them too)">
<rect class="nj-heat-0" x="455" y="297" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="312" text-anchor="middle">0.81</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="325" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · edit&#10;4.44× the time of the fastest library (fully validating)&#10;way: generic (strict)&#10;twitter.json: 1,527 µs&#10;citm_catalog.json: 3,216 µs&#10;canada.json: 11,033 µs&#10;jeopardy.json: 183,648 µs">
<rect class="nj-heat-3" x="501" y="297" width="90" height="34" rx="3"/>
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</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · minify&#10;5.23× the time of the fastest library (fully validating)&#10;way: generic (strict)&#10;twitter.json: 1,512 µs&#10;citm_catalog.json: 3,245 µs&#10;canada.json: 11,112 µs&#10;jeopardy.json: 172,173 µs">
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<text class="nj-charts-cell" x="615.5" y="318" text-anchor="middle">5.23</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · minify, checking less&#10;1.05× the time of the fastest fully validating library&#10;way: minify_json&#10;twitter.json: 284 µs&#10;citm_catalog.json: 747 µs&#10;canada.json: 1,746 µs&#10;jeopardy.json: 40,439 µs&#10;minify_json only removes whitespace, without parsing the values">
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<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="325" text-anchor="middle">P</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · write&#10;2.19× the time of the fastest library (fully validating)&#10;twitter.json: 212 µs · generic&#10;citm_catalog.json: 476 µs · generic (strict)&#10;canada.json: 1,702 µs · generic (strict)&#10;jeopardy.json: 34,032 µs · generic">
<rect class="nj-heat-2" x="685" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="318" text-anchor="middle">2.19</text>
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<text class="nj-charts-rowlabel " x="216" y="354" text-anchor="end">Boost.J&#8203;SON</text>
<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · validate&#10;2.54× the time of the fastest library (fully validating)&#10;way: S&#8203;AX (numbers: none)&#10;twitter.json: 540 µs&#10;citm_catalog.json: 990 µs&#10;canada.json: 1,449 µs&#10;jeopardy.json: 54,480 µs">
<rect class="nj-heat-3" x="225" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="354" text-anchor="middle">2.54</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · sum&#10;2.02× the time of the fastest library (fully validating)&#10;way: S&#8203;AX&#10;twitter.json: 538 µs&#10;citm_catalog.json: 1,028 µs&#10;canada.json: 3,084 µs&#10;jeopardy.json: 54,765 µs">
<rect class="nj-heat-2" x="317" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="354" text-anchor="middle">2.02</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · select&#10;3.31× the time of the fastest library (fully validating)&#10;twitter.json: 623 µs · parse_into structs&#10;citm_catalog.json: 1,208 µs · parse_into structs&#10;canada.json: 3,638 µs · parse&#10;jeopardy.json: 67,923 µs · parse_into structs">
<rect class="nj-heat-3" x="409" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="354" text-anchor="middle">3.31</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · edit&#10;3.23× the time of the fastest library (fully validating)&#10;way: parse&#10;twitter.json: 1,355 µs&#10;citm_catalog.json: 1,997 µs&#10;canada.json: 6,522 µs&#10;jeopardy.json: 157,849 µs">
<rect class="nj-heat-3" x="501" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="354" text-anchor="middle">3.23</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · minify&#10;3.89× the time of the fastest library (fully validating)&#10;way: parse + serialize&#10;twitter.json: 1,407 µs&#10;citm_catalog.json: 2,003 µs&#10;canada.json: 6,555 µs&#10;jeopardy.json: 154,865 µs">
<rect class="nj-heat-3" x="593" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="354" text-anchor="middle">3.89</text>
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<rect class="nj-heat-3" x="685" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="354" text-anchor="middle">3.67</text>
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<text class="nj-charts-rowlabel " x="216" y="390" text-anchor="end">serde_json (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · validate&#10;2.44× the time of the fastest library (fully validating)&#10;way: from_utf8 + IgnoredAny&#10;twitter.json: 452 µs&#10;citm_catalog.json: 1,103 µs&#10;canada.json: 1,556 µs&#10;jeopardy.json: 46,517 µs">
<rect class="nj-heat-2" x="225" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="247.5" y="390" text-anchor="middle">2.44</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · validate, checking less&#10;2.21× the time of the fastest fully validating library&#10;way: IgnoredAny&#10;twitter.json: 354 µs&#10;citm_catalog.json: 1,047 µs&#10;canada.json: 1,451 µs&#10;jeopardy.json: 44,984 µs&#10;trusts U&#8203;TF-8 in the strings it skips (from_slice); strings it reads are checked">
<rect class="nj-heat-2" x="271" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="292.5" y="384" text-anchor="middle">2.21</text>
<text class="nj-charts-cell nj-charts-cell--small" x="292.5" y="397" text-anchor="middle">U</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · sum&#10;2.60× the time of the fastest library (fully validating)&#10;way: visitor&#10;twitter.json: 652 µs&#10;citm_catalog.json: 1,242 µs&#10;canada.json: 4,772 µs&#10;jeopardy.json: 66,568 µs">
<rect class="nj-heat-3" x="317" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="390" text-anchor="middle">2.60</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · select&#10;2.41× the time of the fastest library (fully validating)&#10;way: from_utf8 + structs&#10;twitter.json: 480 µs&#10;citm_catalog.json: 1,125 µs&#10;canada.json: 1,560 µs&#10;jeopardy.json: 62,378 µs">
<rect class="nj-heat-2" x="409" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="390" text-anchor="middle">2.41</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · select, checking less&#10;2.26× the time of the fastest fully validating library&#10;twitter.json: 410 µs · structs&#10;citm_catalog.json: 1,084 µs · structs&#10;canada.json: 1,455 µs · structs&#10;jeopardy.json: 62,378 µs · from_utf8 + structs (validates fully)&#10;trusts U&#8203;TF-8 in the strings it skips (from_slice); strings it reads are checked">
<rect class="nj-heat-2" x="455" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="384" text-anchor="middle">2.26</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="397" text-anchor="middle">U</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · edit&#10;5.02× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 2,009 µs&#10;citm_catalog.json: 3,316 µs&#10;canada.json: 9,666 µs&#10;jeopardy.json: 251,931 µs">
<rect class="nj-heat-4" x="501" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="390" text-anchor="middle">5.02</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · minify&#10;5.85× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 2,004 µs&#10;citm_catalog.json: 3,290 µs&#10;canada.json: 9,792 µs&#10;jeopardy.json: 227,369 µs">
<rect class="nj-heat-4" x="593" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="390" text-anchor="middle">5.85</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · write&#10;2.90× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 322 µs&#10;citm_catalog.json: 490 µs&#10;canada.json: 2,286 µs&#10;jeopardy.json: 49,967 µs">
<rect class="nj-heat-3" x="685" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="390" text-anchor="middle">2.90</text>
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<text class="nj-charts-rowlabel " x="216" y="426" text-anchor="end">RapidJSON</text>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · validate&#10;4.67× the time of the fastest library (fully validating)&#10;twitter.json: 1,318 µs · insitu (copy)&#10;citm_catalog.json: 1,391 µs · S&#8203;AX (string stream, default precision)&#10;canada.json: 1,971 µs · S&#8203;AX (string stream, default precision)&#10;jeopardy.json: 133,695 µs · S&#8203;AX (string stream, default precision)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="225" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="247.5" y="426" text-anchor="middle">4.67</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · validate, checking less&#10;3.09× the time of the fastest fully validating library&#10;twitter.json: 706 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,033 µs · S&#8203;AX (string stream, default precision) (no encoding check)&#10;canada.json: 1,971 µs · S&#8203;AX (string stream, default precision) (validates fully)&#10;jeopardy.json: 64,732 µs · insitu (copy) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="271" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="292.5" y="420" text-anchor="middle">3.09</text>
<text class="nj-charts-cell nj-charts-cell--small" x="292.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · sum&#10;4.18× the time of the fastest library (fully validating)&#10;twitter.json: 1,332 µs · S&#8203;AX&#10;citm_catalog.json: 1,472 µs · S&#8203;AX (string stream)&#10;canada.json: 6,448 µs · S&#8203;AX (string stream)&#10;jeopardy.json: 136,330 µs · S&#8203;AX (string stream)">
<rect class="nj-heat-3" x="317" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="339.5" y="426" text-anchor="middle">4.18</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · sum, checking less&#10;2.89× the time of the fastest fully validating library&#10;twitter.json: 738 µs · S&#8203;AX (string stream) (no encoding check)&#10;citm_catalog.json: 1,157 µs · S&#8203;AX (string stream) (no encoding check)&#10;canada.json: 6,432 µs · S&#8203;AX (string stream) (no encoding check)&#10;jeopardy.json: 71,646 µs · insitu (copy) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="363" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="384.5" y="420" text-anchor="middle">2.89</text>
<text class="nj-charts-cell nj-charts-cell--small" x="384.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · select&#10;6.02× the time of the fastest library (fully validating)&#10;twitter.json: 1,314 µs · insitu (copy)&#10;citm_catalog.json: 1,578 µs · insitu (copy)&#10;canada.json: 6,814 µs · Document (string stream)&#10;jeopardy.json: 144,649 µs · insitu (copy)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-4" x="409" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="426" text-anchor="middle">6.02</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · select, checking less&#10;3.93× the time of the fastest fully validating library&#10;twitter.json: 701 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,166 µs · insitu (copy) (no encoding check)&#10;canada.json: 6,745 µs · Document (string stream) (no encoding check)&#10;jeopardy.json: 67,617 µs · insitu (copy) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="455" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="420" text-anchor="middle">3.93</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · edit&#10;4.85× the time of the fastest library (fully validating)&#10;twitter.json: 1,924 µs · Document&#10;citm_catalog.json: 2,393 µs · insitu (copy)&#10;canada.json: 13,711 µs · Document (string stream)&#10;jeopardy.json: 224,328 µs · Document (string stream)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="501" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="523.5" y="426" text-anchor="middle">4.85</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · edit, checking less&#10;3.83× the time of the fastest fully validating library&#10;twitter.json: 1,356 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,992 µs · insitu (copy) (no encoding check)&#10;canada.json: 13,711 µs · Document (string stream) (validates fully)&#10;jeopardy.json: 147,902 µs · insitu (copy) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="547" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="568.5" y="420" text-anchor="middle">3.83</text>
<text class="nj-charts-cell nj-charts-cell--small" x="568.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · minify&#10;4.85× the time of the fastest library (fully validating)&#10;twitter.json: 1,523 µs · S&#8203;AX to Writer&#10;citm_catalog.json: 1,803 µs · S&#8203;AX to Writer (string stream)&#10;canada.json: 14,378 µs · Document + Writer&#10;jeopardy.json: 174,958 µs · S&#8203;AX to Writer (string stream)">
<rect class="nj-heat-3" x="593" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="426" text-anchor="middle">4.85</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · minify, checking less&#10;3.66× the time of the fastest fully validating library&#10;twitter.json: 1,044 µs · S&#8203;AX to Writer (string stream) (no encoding check)&#10;citm_catalog.json: 1,499 µs · S&#8203;AX to Writer (string stream) (no encoding check)&#10;canada.json: 11,568 µs · S&#8203;AX to Writer (raw numbers) (validates fully)&#10;jeopardy.json: 123,908 µs · S&#8203;AX to Writer (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;copies each number&#x27;s text instead of formatting it (kParseNumbersAsStringsFlag)">
<rect class="nj-heat-3" x="639" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="420" text-anchor="middle">3.66</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="433" text-anchor="middle">U N</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · write&#10;5.74× the time of the fastest library (fully validating)&#10;way: Writer&#10;twitter.json: 596 µs&#10;citm_catalog.json: 836 µs&#10;canada.json: 6,928 µs&#10;jeopardy.json: 80,160 µs">
<rect class="nj-heat-4" x="685" y="405" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="426" text-anchor="middle">5.74</text>
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<text class="nj-charts-tick nj-charts-tick--l" x="8" y="472">time relative to the fastest fully validating library, less is better</text>
<g><rect class="nj-heat-0" x="8" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="46" y="496" text-anchor="middle">below 1.15</text></g>
<g><rect class="nj-heat-1" x="88" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="126" y="496" text-anchor="middle">1.15 to 1.5</text></g>
<g><rect class="nj-heat-2" x="168" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="206" y="496" text-anchor="middle">1.5 to 2.5</text></g>
<g><rect class="nj-heat-3" x="248" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="286" y="496" text-anchor="middle">2.5 to 5</text></g>
<g><rect class="nj-heat-4" x="328" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="366" y="496" text-anchor="middle">5 and more</text></g>
<rect class="nj-heat-na" x="420" y="482" width="40" height="20" rx="3"/>
<text class="nj-charts-tick" x="440" y="496">n/a</text>
<text class="nj-charts-tick nj-charts-tick--l" x="468" y="496">no A&#8203;PI for it</text>
</svg>
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<svg class="nj-fig nj-charts nj-charts--blog nj-charts--heat" viewBox="0 0 784 510" role="img" aria-labelledby="nj-blog-uc-x86-clang nj-blog-uc-x86-clang-d" xmlns="http://www.w3.org/2000/svg">
<title id="nj-blog-uc-x86-clang">Use cases: time of each library relative to the fastest, x86-64 with Clang 23</title>
<desc id="nj-blog-uc-x86-clang-d">Table of relative times, libraries by use case. nlohmann/json json_document validate: 1.00; nlohmann/json json_document sum: 1.05; nlohmann/json json_document select: 1.00; nlohmann/json json_document edit: 1.00 (0.81 doing less, N); nlohmann/json json_document minify: 1.00 (0.83 doing less, N); nlohmann/json json_document write: 1.00 (0.71 doing less, N); yyjson validate: 2.21; yyjson sum: 1.23; yyjson select: 1.40; yyjson edit: 1.48; yyjson minify: 1.27 (1.09 doing less, N); yyjson write: 1.16; sonic-cpp validate: no fully validating way (2.32 doing less, U); sonic-cpp sum: no fully validating way (1.26 doing less, U); sonic-cpp select: no fully validating way (1.50 doing less, U); sonic-cpp edit: no fully validating way (1.21 doing less, U); sonic-cpp minify: no fully validating way (1.36 doing less, U); sonic-cpp write: 1.33; simdjson validate: 2.06; simdjson sum: 1.19; simdjson select: 1.33 (0.56 doing less, P); simdjson edit: n/a; simdjson minify: 1.55 (0.18 doing less, P); simdjson write: 2.07; sonic-rs (Rust) validate: 1.90; sonic-rs (Rust) sum: 1.13; sonic-rs (Rust) select: 1.37; sonic-rs (Rust) edit: 1.90; sonic-rs (Rust) minify: 1.75; sonic-rs (Rust) write: 2.01; Boost.J&#8203;SON validate: 1.80; Boost.J&#8203;SON sum: 1.17; Boost.J&#8203;SON select: 2.19; Boost.J&#8203;SON edit: 2.37; Boost.J&#8203;SON minify: 2.65; Boost.J&#8203;SON write: 2.38; nlohmann/json json validate: 1.43; nlohmann/json json sum: 1.00; nlohmann/json json select: 6.54; nlohmann/json json edit: 3.53; nlohmann/json json minify: 4.31; nlohmann/json json write: 1.88; simd-json (Rust) validate: 3.57; simd-json (Rust) sum: 1.91; simd-json (Rust) select: 2.61; simd-json (Rust) edit: 2.88; simd-json (Rust) minify: 3.43; simd-json (Rust) write: 2.28; serde_json (Rust) validate: 2.36 (2.11 doing less, U); serde_json (Rust) sum: 2.35; serde_json (Rust) select: 1.75; serde_json (Rust) edit: 4.53; serde_json (Rust) minify: 4.99; serde_json (Rust) write: 2.22; Glaze validate: 2.24; Glaze sum: 4.24 (3.96 doing less, P); Glaze select: 1.39 (0.61 doing less, P); Glaze edit: 5.50; Glaze minify: 5.78 (0.69 doing less, P); Glaze write: 1.95; RapidJSON validate: 5.18 (3.77 doing less, U); RapidJSON sum: 3.25 (2.40 doing less, U); RapidJSON select: 4.45 (3.45 doing less, U); RapidJSON edit: 3.16 (2.68 doing less, U); RapidJSON minify: 3.43 (2.57 doing less, U N); RapidJSON write: 2.86.</desc>
<text class="nj-charts-tick" x="270" y="34">validate</text>
<text class="nj-charts-tick" x="362" y="34">sum</text>
<text class="nj-charts-tick" x="454" y="34">select</text>
<text class="nj-charts-tick" x="546" y="34">edit</text>
<text class="nj-charts-tick" x="638" y="34">minify</text>
<text class="nj-charts-tick" x="730" y="34">write</text>
<text class="nj-charts-rowlabel nj-charts-name-json" x="216" y="66" text-anchor="end">nlohmann/json json_document</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · edit&#10;1.00× the time of the fastest library (fully validating)&#10;way: editable&#10;twitter.json: 519 µs&#10;citm_catalog.json: 1,152 µs&#10;canada.json: 5,671 µs&#10;jeopardy.json: 195,716 µs">
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<rect class="nj-heat-0" x="547" y="45" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="568.5" y="60" text-anchor="middle">0.81</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · minify&#10;1.00× the time of the fastest library (fully validating)&#10;way: parse + dump&#10;twitter.json: 472 µs&#10;citm_catalog.json: 1,055 µs&#10;canada.json: 5,041 µs&#10;jeopardy.json: 149,143 µs">
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<text class="nj-charts-cell" x="660.5" y="60" text-anchor="middle">0.83</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="73" text-anchor="middle">N</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · write&#10;1.00× the time of the fastest library (fully validating)&#10;way: dump&#10;twitter.json: 158 µs&#10;citm_catalog.json: 279 µs&#10;canada.json: 3,637 µs&#10;jeopardy.json: 67,366 µs">
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · write, checking less&#10;0.71× the time of the fastest fully validating library&#10;twitter.json: 153 µs · dump (source numbers) (validates fully)&#10;citm_catalog.json: 276 µs · dump (source numbers) (validates fully)&#10;canada.json: 982 µs · dump (source numbers) (validates fully)&#10;jeopardy.json: 67,366 µs · dump (validates fully)&#10;copies each number&#x27;s text instead of formatting it (number_format::source)">
<rect class="nj-heat-0" x="731" y="45" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="752.5" y="60" text-anchor="middle">0.71</text>
<text class="nj-charts-cell nj-charts-cell--small" x="752.5" y="73" text-anchor="middle">N</text>
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<text class="nj-charts-rowlabel " x="216" y="102" text-anchor="end">yyjson</text>
<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · validate&#10;2.21× the time of the fastest library (fully validating)&#10;twitter.json: 383 µs · read&#10;citm_catalog.json: 887 µs · read&#10;canada.json: 2,572 µs · read (raw numbers)&#10;jeopardy.json: 123,640 µs · read (raw numbers)">
<rect class="nj-heat-2" x="225" y="81" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="102" text-anchor="middle">2.21</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · sum&#10;1.23× the time of the fastest library (fully validating)&#10;twitter.json: 436 µs · read&#10;citm_catalog.json: 1,048 µs · insitu (copy)&#10;canada.json: 3,454 µs · read&#10;jeopardy.json: 133,577 µs · read&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-1" x="317" y="81" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="102" text-anchor="middle">1.23</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · select&#10;1.40× the time of the fastest library (fully validating)&#10;twitter.json: 386 µs · insitu (copy)&#10;citm_catalog.json: 891 µs · insitu (copy)&#10;canada.json: 2,572 µs · read (raw numbers)&#10;jeopardy.json: 135,813 µs · insitu (copy)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-1" x="409" y="81" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="102" text-anchor="middle">1.40</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · edit&#10;1.48× the time of the fastest library (fully validating)&#10;twitter.json: 833 µs · mut copy&#10;citm_catalog.json: 1,674 µs · mut copy&#10;canada.json: 7,249 µs · mut copy&#10;jeopardy.json: 316,652 µs · insitu (copy) + mut copy&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-1" x="501" y="81" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="102" text-anchor="middle">1.48</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · minify&#10;1.27× the time of the fastest library (fully validating)&#10;way: read + write&#10;twitter.json: 626 µs&#10;citm_catalog.json: 1,261 µs&#10;canada.json: 6,179 µs&#10;jeopardy.json: 200,886 µs">
<rect class="nj-heat-1" x="593" y="81" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="102" text-anchor="middle">1.27</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · minify, checking less&#10;1.09× the time of the fastest fully validating library&#10;twitter.json: 626 µs · read + write (validates fully)&#10;citm_catalog.json: 1,236 µs · read (raw numbers) + write (validates fully)&#10;canada.json: 3,426 µs · read (raw numbers) + write (validates fully)&#10;jeopardy.json: 197,700 µs · read (raw numbers) + write (validates fully)&#10;copies each number&#x27;s text instead of formatting it (YYJSON_READ_NUMBER_AS_RAW)">
<rect class="nj-heat-0" x="639" y="81" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="96" text-anchor="middle">1.09</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="109" text-anchor="middle">N</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · write&#10;1.16× the time of the fastest library (fully validating)&#10;way: write&#10;twitter.json: 216 µs&#10;citm_catalog.json: 367 µs&#10;canada.json: 3,366 µs&#10;jeopardy.json: 73,272 µs">
<rect class="nj-heat-1" x="685" y="81" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="102" text-anchor="middle">1.16</text>
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<text class="nj-charts-rowlabel " x="216" y="138" text-anchor="end">sonic-cpp</text>
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<rect class="nj-heat-2" x="225" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="132" text-anchor="middle">2.32</text>
<text class="nj-charts-cell nj-charts-cell--small" x="270" y="145" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · sum, checking less&#10;1.26× the time of the fastest fully validating library&#10;way: Document&#10;twitter.json: 504 µs&#10;citm_catalog.json: 1,176 µs&#10;canada.json: 3,701 µs&#10;jeopardy.json: 104,509 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-1" x="317" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="132" text-anchor="middle">1.26</text>
<text class="nj-charts-cell nj-charts-cell--small" x="362" y="145" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · select, checking less&#10;1.50× the time of the fastest fully validating library&#10;way: Document&#10;twitter.json: 454 µs&#10;citm_catalog.json: 1,015 µs&#10;canada.json: 3,025 µs&#10;jeopardy.json: 112,621 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-1" x="409" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="132" text-anchor="middle">1.50</text>
<text class="nj-charts-cell nj-charts-cell--small" x="454" y="145" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · edit, checking less&#10;1.21× the time of the fastest fully validating library&#10;way: Document&#10;twitter.json: 642 µs&#10;citm_catalog.json: 1,497 µs&#10;canada.json: 8,153 µs&#10;jeopardy.json: 184,321 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-1" x="501" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="132" text-anchor="middle">1.21</text>
<text class="nj-charts-cell nj-charts-cell--small" x="546" y="145" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · minify, checking less&#10;1.36× the time of the fastest fully validating library&#10;way: Document + Serialize&#10;twitter.json: 655 µs&#10;citm_catalog.json: 1,474 µs&#10;canada.json: 7,856 µs&#10;jeopardy.json: 169,992 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-1" x="593" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="132" text-anchor="middle">1.36</text>
<text class="nj-charts-cell nj-charts-cell--small" x="638" y="145" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · write&#10;1.33× the time of the fastest library (fully validating)&#10;way: Serialize&#10;twitter.json: 228 µs&#10;citm_catalog.json: 474 µs&#10;canada.json: 4,766 µs&#10;jeopardy.json: 66,619 µs">
<rect class="nj-heat-1" x="685" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="138" text-anchor="middle">1.33</text>
</g>
<text class="nj-charts-rowlabel " x="216" y="174" text-anchor="end">simdjson</text>
<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · validate&#10;2.06× the time of the fastest library (fully validating)&#10;way: D&#8203;OM&#10;twitter.json: 302 µs&#10;citm_catalog.json: 721 µs&#10;canada.json: 3,202 µs&#10;jeopardy.json: 116,859 µs">
<rect class="nj-heat-2" x="225" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="174" text-anchor="middle">2.06</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · sum&#10;1.19× the time of the fastest library (fully validating)&#10;twitter.json: 391 µs · D&#8203;OM&#10;citm_catalog.json: 969 µs · D&#8203;OM&#10;canada.json: 4,121 µs · D&#8203;OM&#10;jeopardy.json: 116,855 µs · On-Demand">
<rect class="nj-heat-1" x="317" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="174" text-anchor="middle">1.19</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · select&#10;1.33× the time of the fastest library (fully validating)&#10;way: D&#8203;OM&#10;twitter.json: 318 µs&#10;citm_catalog.json: 728 µs&#10;canada.json: 3,213 µs&#10;jeopardy.json: 129,986 µs">
<rect class="nj-heat-1" x="409" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="174" text-anchor="middle">1.33</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · select, checking less&#10;0.56× the time of the fastest fully validating library&#10;way: On-Demand&#10;twitter.json: 182 µs&#10;citm_catalog.json: 494 µs&#10;canada.json: 692 µs&#10;jeopardy.json: 50,660 µs&#10;reads lazily: On-Demand reads only what you ask for and steps over the rest by matching brackets">
<rect class="nj-heat-0" x="455" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="168" text-anchor="middle">0.56</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="181" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · edit&#10;simdjson&#x27;s documents are read-only: it has no A&#8203;PI to change a value and write the result">
<rect class="nj-heat-na" x="501" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-tick" x="546" y="174">n/a</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · minify&#10;1.55× the time of the fastest library (fully validating)&#10;way: D&#8203;OM + to_string&#10;twitter.json: 706 µs&#10;citm_catalog.json: 1,411 µs&#10;canada.json: 8,125 µs&#10;jeopardy.json: 270,332 µs">
<rect class="nj-heat-2" x="593" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="174" text-anchor="middle">1.55</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · minify, checking less&#10;0.18× the time of the fastest fully validating library&#10;way: minify&#10;twitter.json: 99.0 µs&#10;citm_catalog.json: 270 µs&#10;canada.json: 329 µs&#10;jeopardy.json: 42,546 µs&#10;simdjson::minify() only removes whitespace, without parsing the values">
<rect class="nj-heat-0" x="639" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="168" text-anchor="middle">0.18</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="181" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · write&#10;2.07× the time of the fastest library (fully validating)&#10;way: to_string&#10;twitter.json: 382 µs&#10;citm_catalog.json: 661 µs&#10;canada.json: 4,787 µs&#10;jeopardy.json: 162,220 µs">
<rect class="nj-heat-2" x="685" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="174" text-anchor="middle">2.07</text>
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<text class="nj-charts-rowlabel " x="216" y="210" text-anchor="end">sonic-rs (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · validate&#10;1.90× the time of the fastest library (fully validating)&#10;way: IgnoredAny&#10;twitter.json: 501 µs&#10;citm_catalog.json: 970 µs&#10;canada.json: 2,249 µs&#10;jeopardy.json: 54,369 µs">
<rect class="nj-heat-2" x="225" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="210" text-anchor="middle">1.90</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · sum&#10;1.13× the time of the fastest library (fully validating)&#10;way: visitor&#10;twitter.json: 501 µs&#10;citm_catalog.json: 1,123 µs&#10;canada.json: 4,397 µs&#10;jeopardy.json: 59,583 µs">
<rect class="nj-heat-0" x="317" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="210" text-anchor="middle">1.13</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · select&#10;1.37× the time of the fastest library (fully validating)&#10;way: structs&#10;twitter.json: 504 µs&#10;citm_catalog.json: 1,033 µs&#10;canada.json: 2,328 µs&#10;jeopardy.json: 90,486 µs">
<rect class="nj-heat-1" x="409" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="210" text-anchor="middle">1.37</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · edit&#10;1.90× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 1,197 µs&#10;citm_catalog.json: 2,389 µs&#10;canada.json: 7,744 µs&#10;jeopardy.json: 390,952 µs">
<rect class="nj-heat-2" x="501" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="210" text-anchor="middle">1.90</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · minify&#10;1.75× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 1,000 µs&#10;citm_catalog.json: 2,097 µs&#10;canada.json: 7,795 µs&#10;jeopardy.json: 215,280 µs">
<rect class="nj-heat-2" x="593" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="210" text-anchor="middle">1.75</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · write&#10;2.01× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 434 µs&#10;citm_catalog.json: 927 µs&#10;canada.json: 3,987 µs&#10;jeopardy.json: 109,176 µs">
<rect class="nj-heat-2" x="685" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="210" text-anchor="middle">2.01</text>
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<text class="nj-charts-rowlabel " x="216" y="246" text-anchor="end">Boost.J&#8203;SON</text>
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<rect class="nj-heat-2" x="225" y="225" width="90" height="34" rx="3"/>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · sum&#10;1.17× the time of the fastest library (fully validating)&#10;way: S&#8203;AX&#10;twitter.json: 580 µs&#10;citm_catalog.json: 928 µs&#10;canada.json: 5,715 µs&#10;jeopardy.json: 55,874 µs">
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<rect class="nj-heat-2" x="409" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="246" text-anchor="middle">2.19</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · edit&#10;2.37× the time of the fastest library (fully validating)&#10;way: parse&#10;twitter.json: 1,716 µs&#10;citm_catalog.json: 2,578 µs&#10;canada.json: 13,427 µs&#10;jeopardy.json: 354,510 µs">
<rect class="nj-heat-2" x="501" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="246" text-anchor="middle">2.37</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · minify&#10;2.65× the time of the fastest library (fully validating)&#10;way: parse + serialize&#10;twitter.json: 1,722 µs&#10;citm_catalog.json: 2,573 µs&#10;canada.json: 12,678 µs&#10;jeopardy.json: 330,878 µs">
<rect class="nj-heat-3" x="593" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="246" text-anchor="middle">2.65</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · write&#10;2.38× the time of the fastest library (fully validating)&#10;way: serialize&#10;twitter.json: 478 µs&#10;citm_catalog.json: 913 µs&#10;canada.json: 5,610 µs&#10;jeopardy.json: 141,994 µs">
<rect class="nj-heat-2" x="685" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="246" text-anchor="middle">2.38</text>
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<text class="nj-charts-rowlabel nj-charts-name-json" x="216" y="282" text-anchor="end">nlohmann/json json</text>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · validate&#10;1.43× the time of the fastest library (fully validating)&#10;way: accept&#10;twitter.json: 335 µs&#10;citm_catalog.json: 711 µs&#10;canada.json: 2,018 µs&#10;jeopardy.json: 39,513 µs">
<rect class="nj-heat-1" x="225" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="282" text-anchor="middle">1.43</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · sum&#10;1.00× the time of the fastest library (fully validating)&#10;way: sax&#10;twitter.json: 431 µs&#10;citm_catalog.json: 914 µs&#10;canada.json: 3,824 µs&#10;jeopardy.json: 60,439 µs">
<rect class="nj-heat-0" x="317" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="282" text-anchor="middle">1.00</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · select&#10;6.54× the time of the fastest library (fully validating)&#10;way: parse&#10;twitter.json: 3,181 µs&#10;citm_catalog.json: 4,583 µs&#10;canada.json: 9,599 µs&#10;jeopardy.json: 405,734 µs">
<rect class="nj-heat-4" x="409" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="282" text-anchor="middle">6.54</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · edit&#10;3.53× the time of the fastest library (fully validating)&#10;twitter.json: 2,452 µs · ordered_json&#10;citm_catalog.json: 4,402 µs · ordered_json&#10;canada.json: 14,765 µs · parse&#10;jeopardy.json: 646,489 µs · ordered_json">
<rect class="nj-heat-3" x="501" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="282" text-anchor="middle">3.53</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · minify&#10;4.31× the time of the fastest library (fully validating)&#10;way: parse + dump&#10;twitter.json: 3,525 µs&#10;citm_catalog.json: 5,178 µs&#10;canada.json: 14,024 µs&#10;jeopardy.json: 506,705 µs">
<rect class="nj-heat-3" x="593" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="282" text-anchor="middle">4.31</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · write&#10;1.88× the time of the fastest library (fully validating)&#10;way: dump&#10;twitter.json: 438 µs&#10;citm_catalog.json: 599 µs&#10;canada.json: 4,458 µs&#10;jeopardy.json: 116,318 µs">
<rect class="nj-heat-2" x="685" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="282" text-anchor="middle">1.88</text>
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<text class="nj-charts-rowlabel " x="216" y="318" text-anchor="end">simd-json (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · validate&#10;3.57× the time of the fastest library (fully validating)&#10;way: tape (copy)&#10;twitter.json: 567 µs&#10;citm_catalog.json: 1,430 µs&#10;canada.json: 4,359 µs&#10;jeopardy.json: 207,551 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="225" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="318" text-anchor="middle">3.57</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · sum&#10;1.91× the time of the fastest library (fully validating)&#10;way: visitor (copy)&#10;twitter.json: 681 µs&#10;citm_catalog.json: 1,650 µs&#10;canada.json: 5,083 µs&#10;jeopardy.json: 210,185 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="317" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="318" text-anchor="middle">1.91</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · select&#10;2.61× the time of the fastest library (fully validating)&#10;way: structs (copy)&#10;twitter.json: 679 µs&#10;citm_catalog.json: 1,731 µs&#10;canada.json: 5,144 µs&#10;jeopardy.json: 239,164 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="409" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="318" text-anchor="middle">2.61</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · edit&#10;2.88× the time of the fastest library (fully validating)&#10;twitter.json: 1,862 µs · borrowed (copy)&#10;citm_catalog.json: 4,194 µs · borrowed (copy)&#10;canada.json: 14,896 µs · owned (copy)&#10;jeopardy.json: 391,369 µs · borrowed (copy)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="501" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="318" text-anchor="middle">2.88</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · minify&#10;3.43× the time of the fastest library (fully validating)&#10;way: borrowed (copy)&#10;twitter.json: 1,889 µs&#10;citm_catalog.json: 4,196 µs&#10;canada.json: 15,716 µs&#10;jeopardy.json: 414,377 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="593" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="318" text-anchor="middle">3.43</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · write&#10;2.28× the time of the fastest library (fully validating)&#10;way: borrowed&#10;twitter.json: 582 µs&#10;citm_catalog.json: 800 µs&#10;canada.json: 5,147 µs&#10;jeopardy.json: 122,623 µs">
<rect class="nj-heat-2" x="685" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="318" text-anchor="middle">2.28</text>
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<text class="nj-charts-rowlabel " x="216" y="354" text-anchor="end">serde_json (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · validate&#10;2.36× the time of the fastest library (fully validating)&#10;way: from_utf8 + IgnoredAny&#10;twitter.json: 624 µs&#10;citm_catalog.json: 1,440 µs&#10;canada.json: 2,406 µs&#10;jeopardy.json: 64,720 µs">
<rect class="nj-heat-2" x="225" y="333" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="247.5" y="354" text-anchor="middle">2.36</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · validate, checking less&#10;2.11× the time of the fastest fully validating library&#10;way: IgnoredAny&#10;twitter.json: 484 µs&#10;citm_catalog.json: 1,370 µs&#10;canada.json: 2,314 µs&#10;jeopardy.json: 58,247 µs&#10;trusts U&#8203;TF-8 in the strings it skips (from_slice); strings it reads are checked">
<rect class="nj-heat-2" x="271" y="333" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="292.5" y="348" text-anchor="middle">2.11</text>
<text class="nj-charts-cell nj-charts-cell--small" x="292.5" y="361" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · sum&#10;2.35× the time of the fastest library (fully validating)&#10;way: visitor&#10;twitter.json: 1,311 µs&#10;citm_catalog.json: 2,288 µs&#10;canada.json: 7,127 µs&#10;jeopardy.json: 129,497 µs">
<rect class="nj-heat-2" x="317" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="354" text-anchor="middle">2.35</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · select&#10;1.75× the time of the fastest library (fully validating)&#10;way: from_utf8 + structs&#10;twitter.json: 701 µs&#10;citm_catalog.json: 1,532 µs&#10;canada.json: 2,529 µs&#10;jeopardy.json: 107,316 µs">
<rect class="nj-heat-2" x="409" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="354" text-anchor="middle">1.75</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · edit&#10;4.53× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 4,042 µs&#10;citm_catalog.json: 6,586 µs&#10;canada.json: 16,631 µs&#10;jeopardy.json: 632,766 µs">
<rect class="nj-heat-3" x="501" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="354" text-anchor="middle">4.53</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · minify&#10;4.99× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 4,012 µs&#10;citm_catalog.json: 6,583 µs&#10;canada.json: 17,306 µs&#10;jeopardy.json: 509,702 µs">
<rect class="nj-heat-3" x="593" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="354" text-anchor="middle">4.99</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · write&#10;2.22× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 550 µs&#10;citm_catalog.json: 887 µs&#10;canada.json: 4,005 µs&#10;jeopardy.json: 134,163 µs">
<rect class="nj-heat-2" x="685" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="354" text-anchor="middle">2.22</text>
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<text class="nj-charts-rowlabel " x="216" y="390" text-anchor="end">Glaze</text>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · validate&#10;2.24× the time of the fastest library (fully validating)&#10;way: validate_json&#10;twitter.json: 594 µs&#10;citm_catalog.json: 1,230 µs&#10;canada.json: 2,139 µs&#10;jeopardy.json: 73,235 µs">
<rect class="nj-heat-2" x="225" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="390" text-anchor="middle">2.24</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · sum&#10;4.24× the time of the fastest library (fully validating)&#10;way: generic (double, strict)&#10;twitter.json: 2,374 µs&#10;citm_catalog.json: 3,982 µs&#10;canada.json: 11,930 µs&#10;jeopardy.json: 261,204 µs">
<rect class="nj-heat-3" x="317" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="339.5" y="390" text-anchor="middle">4.24</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · sum, checking less&#10;3.96× the time of the fastest fully validating library&#10;twitter.json: 2,374 µs · generic (double, strict) (validates fully)&#10;citm_catalog.json: 3,982 µs · generic (double, strict) (validates fully)&#10;canada.json: 11,921 µs · generic (double)&#10;jeopardy.json: 198,036 µs · lazy_json&#10;accepts trailing garbage after the value: Glaze&#x27;s default (validate_trailing_whitespace checks it)&#10;reads lazily: lazy_json reads only what you ask for and steps over the rest">
<rect class="nj-heat-3" x="363" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="384.5" y="384" text-anchor="middle">3.96</text>
<text class="nj-charts-cell nj-charts-cell--small" x="384.5" y="397" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · select&#10;1.39× the time of the fastest library (fully validating)&#10;way: structs (validate_skipped)&#10;twitter.json: 542 µs&#10;citm_catalog.json: 1,369 µs&#10;canada.json: 1,846 µs&#10;jeopardy.json: 83,907 µs">
<rect class="nj-heat-1" x="409" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="390" text-anchor="middle">1.39</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · select, checking less&#10;0.61× the time of the fastest fully validating library&#10;way: structs&#10;twitter.json: 337 µs&#10;citm_catalog.json: 416 µs&#10;canada.json: 447 µs&#10;jeopardy.json: 68,455 µs&#10;reads into structs and steps over fields it doesn&#x27;t know without checking them (validate_skipped checks them too)">
<rect class="nj-heat-0" x="455" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="384" text-anchor="middle">0.61</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="397" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · edit&#10;5.50× the time of the fastest library (fully validating)&#10;way: generic (strict)&#10;twitter.json: 3,896 µs&#10;citm_catalog.json: 7,671 µs&#10;canada.json: 28,104 µs&#10;jeopardy.json: 723,675 µs">
<rect class="nj-heat-4" x="501" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="390" text-anchor="middle">5.50</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · minify&#10;5.78× the time of the fastest library (fully validating)&#10;way: generic (strict)&#10;twitter.json: 3,801 µs&#10;citm_catalog.json: 7,482 µs&#10;canada.json: 26,932 µs&#10;jeopardy.json: 544,342 µs">
<rect class="nj-heat-4" x="593" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="390" text-anchor="middle">5.78</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · minify, checking less&#10;0.69× the time of the fastest fully validating library&#10;way: minify_json&#10;twitter.json: 422 µs&#10;citm_catalog.json: 1,051 µs&#10;canada.json: 2,140 µs&#10;jeopardy.json: 87,842 µs&#10;minify_json only removes whitespace, without parsing the values">
<rect class="nj-heat-0" x="639" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="384" text-anchor="middle">0.69</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="397" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · write&#10;1.95× the time of the fastest library (fully validating)&#10;twitter.json: 396 µs · generic&#10;citm_catalog.json: 725 µs · generic (strict)&#10;canada.json: 4,107 µs · generic (strict)&#10;jeopardy.json: 132,573 µs · generic">
<rect class="nj-heat-2" x="685" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="390" text-anchor="middle">1.95</text>
</g>
<text class="nj-charts-rowlabel " x="216" y="426" text-anchor="end">RapidJSON</text>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · validate&#10;5.18× the time of the fastest library (fully validating)&#10;twitter.json: 1,798 µs · insitu (copy)&#10;citm_catalog.json: 1,944 µs · S&#8203;AX (default precision)&#10;canada.json: 4,019 µs · S&#8203;AX (string stream, default precision)&#10;jeopardy.json: 232,684 µs · S&#8203;AX (string stream, default precision)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-4" x="225" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="247.5" y="426" text-anchor="middle">5.18</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · validate, checking less&#10;3.77× the time of the fastest fully validating library&#10;twitter.json: 1,173 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,504 µs · S&#8203;AX (default precision) (no encoding check)&#10;canada.json: 4,019 µs · S&#8203;AX (string stream, default precision) (validates fully)&#10;jeopardy.json: 128,516 µs · S&#8203;AX (string stream, default precision) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="271" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="292.5" y="420" text-anchor="middle">3.77</text>
<text class="nj-charts-cell nj-charts-cell--small" x="292.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · sum&#10;3.25× the time of the fastest library (fully validating)&#10;twitter.json: 1,846 µs · insitu (copy)&#10;citm_catalog.json: 2,176 µs · S&#8203;AX&#10;canada.json: 10,561 µs · S&#8203;AX (string stream)&#10;jeopardy.json: 239,499 µs · S&#8203;AX (string stream)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="317" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="339.5" y="426" text-anchor="middle">3.25</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · sum, checking less&#10;2.40× the time of the fastest fully validating library&#10;twitter.json: 1,229 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,761 µs · S&#8203;AX (no encoding check)&#10;canada.json: 10,561 µs · S&#8203;AX (string stream) (validates fully)&#10;jeopardy.json: 131,510 µs · S&#8203;AX (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="363" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="384.5" y="420" text-anchor="middle">2.40</text>
<text class="nj-charts-cell nj-charts-cell--small" x="384.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · select&#10;4.45× the time of the fastest library (fully validating)&#10;way: insitu (copy)&#10;twitter.json: 1,806 µs&#10;citm_catalog.json: 2,303 µs&#10;canada.json: 11,395 µs&#10;jeopardy.json: 257,762 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="409" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="426" text-anchor="middle">4.45</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · select, checking less&#10;3.45× the time of the fastest fully validating library&#10;twitter.json: 1,184 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,929 µs · insitu (copy) (no encoding check)&#10;canada.json: 11,261 µs · Document (string stream) (no encoding check)&#10;jeopardy.json: 171,716 µs · Document (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="455" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="420" text-anchor="middle">3.45</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · edit&#10;3.16× the time of the fastest library (fully validating)&#10;way: insitu (copy)&#10;twitter.json: 2,478 µs&#10;citm_catalog.json: 3,261 µs&#10;canada.json: 21,686 µs&#10;jeopardy.json: 378,727 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="501" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="523.5" y="426" text-anchor="middle">3.16</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · edit, checking less&#10;2.68× the time of the fastest fully validating library&#10;twitter.json: 1,842 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 2,887 µs · insitu (copy) (no encoding check)&#10;canada.json: 21,686 µs · insitu (copy) (validates fully)&#10;jeopardy.json: 294,727 µs · Document (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
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<text class="nj-charts-cell" x="568.5" y="420" text-anchor="middle">2.68</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · minify&#10;3.43× the time of the fastest library (fully validating)&#10;twitter.json: 2,456 µs · S&#8203;AX to Writer&#10;citm_catalog.json: 2,864 µs · S&#8203;AX to Writer&#10;canada.json: 21,753 µs · Document + Writer&#10;jeopardy.json: 338,985 µs · S&#8203;AX to Writer (string stream)">
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<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="433" text-anchor="middle">U N</text>
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<text class="nj-charts-tick nj-charts-tick--l" x="8" y="472">time relative to the fastest fully validating library, less is better</text>
<g><rect class="nj-heat-0" x="8" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="46" y="496" text-anchor="middle">below 1.15</text></g>
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<text class="nj-charts-cell nj-charts-cell--small" x="126" y="496" text-anchor="middle">1.15 to 1.5</text></g>
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<text class="nj-charts-cell nj-charts-cell--small" x="206" y="496" text-anchor="middle">1.5 to 2.5</text></g>
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<text class="nj-charts-cell nj-charts-cell--small" x="286" y="496" text-anchor="middle">2.5 to 5</text></g>
<g><rect class="nj-heat-4" x="328" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="366" y="496" text-anchor="middle">5 and more</text></g>
<rect class="nj-heat-na" x="420" y="482" width="40" height="20" rx="3"/>
<text class="nj-charts-tick" x="440" y="496">n/a</text>
<text class="nj-charts-tick nj-charts-tick--l" x="468" y="496">no A&#8203;PI for it</text>
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<title id="nj-blog-uc-x86-gcc">Use cases: time of each library relative to the fastest, x86-64 with G&#8203;CC 16.2</title>
<desc id="nj-blog-uc-x86-gcc-d">Table of relative times, libraries by use case. nlohmann/json json_document validate: 1.00; nlohmann/json json_document sum: 1.10; nlohmann/json json_document select: 1.00; nlohmann/json json_document edit: 1.00 (0.78 doing less, N); nlohmann/json json_document minify: 1.00 (0.78 doing less, N); nlohmann/json json_document write: 1.00 (0.64 doing less, N); yyjson validate: 2.23; yyjson sum: 1.31; yyjson select: 1.37; yyjson edit: 1.43; yyjson minify: 1.24 (0.99 doing less, N); yyjson write: 1.08; sonic-cpp validate: no fully validating way (2.32 doing less, U); sonic-cpp sum: no fully validating way (1.26 doing less, U); sonic-cpp select: no fully validating way (1.43 doing less, U); sonic-cpp edit: no fully validating way (1.18 doing less, U); sonic-cpp minify: no fully validating way (1.33 doing less, U); sonic-cpp write: 1.49; simdjson validate: 2.08; simdjson sum: 1.00; simdjson select: 1.29 (0.55 doing less, P); simdjson edit: n/a; simdjson minify: 1.49 (0.17 doing less, P); simdjson write: 2.09; sonic-rs (Rust) validate: 1.98; sonic-rs (Rust) sum: 1.14; sonic-rs (Rust) select: 1.36; sonic-rs (Rust) edit: 1.87; sonic-rs (Rust) minify: 1.68; sonic-rs (Rust) write: 2.05; Boost.J&#8203;SON validate: 1.98; Boost.J&#8203;SON sum: 1.29; Boost.J&#8203;SON select: 2.21; Boost.J&#8203;SON edit: 2.33; Boost.J&#8203;SON minify: 2.54; Boost.J&#8203;SON write: 2.33; nlohmann/json json validate: 1.69; nlohmann/json json sum: 1.17; nlohmann/json json select: 6.20; nlohmann/json json edit: 3.42; nlohmann/json json minify: 4.07; nlohmann/json json write: 1.84; simd-json (Rust) validate: 3.71; simd-json (Rust) sum: 1.93; simd-json (Rust) select: 2.59; simd-json (Rust) edit: 2.83; simd-json (Rust) minify: 3.30; simd-json (Rust) write: 2.34; serde_json (Rust) validate: 2.46 (2.19 doing less, U); serde_json (Rust) sum: 2.38; serde_json (Rust) select: 1.74; serde_json (Rust) edit: 4.45; serde_json (Rust) minify: 4.80; serde_json (Rust) write: 2.27; RapidJSON validate: 3.86 (3.48 doing less, U); RapidJSON sum: 2.35 (2.15 doing less, U); RapidJSON select: 3.17 (3.02 doing less, U); RapidJSON edit: 2.49 (2.40 doing less, U); RapidJSON minify: 2.58 (2.36 doing less, U N); RapidJSON write: 2.94; Glaze validate: 2.87; Glaze sum: 4.05; Glaze select: 1.71 (0.59 doing less, P); Glaze edit: 4.48; Glaze minify: 4.56 (0.75 doing less, P); Glaze write: 1.96.</desc>
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<text class="nj-charts-tick" x="546" y="34">edit</text>
<text class="nj-charts-tick" x="638" y="34">minify</text>
<text class="nj-charts-tick" x="730" y="34">write</text>
<text class="nj-charts-rowlabel nj-charts-name-json" x="216" y="66" text-anchor="end">nlohmann/json json_document</text>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · validate&#10;1.00× the time of the fastest library (fully validating)&#10;way: accept&#10;twitter.json: 254 µs&#10;citm_catalog.json: 515 µs&#10;canada.json: 892 µs&#10;jeopardy.json: 33,006 µs">
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<text class="nj-charts-cell" x="270" y="66" text-anchor="middle">1.00</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · sum&#10;1.10× the time of the fastest library (fully validating)&#10;way: parse&#10;twitter.json: 384 µs&#10;citm_catalog.json: 1,066 µs&#10;canada.json: 3,526 µs&#10;jeopardy.json: 88,527 µs">
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · edit&#10;1.00× the time of the fastest library (fully validating)&#10;way: editable&#10;twitter.json: 538 µs&#10;citm_catalog.json: 1,214 µs&#10;canada.json: 5,640 µs&#10;jeopardy.json: 193,024 µs">
<rect class="nj-heat-0" x="501" y="45" width="44" height="34" rx="3"/>
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<text class="nj-charts-cell nj-charts-cell--small" x="568.5" y="73" text-anchor="middle">N</text>
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<text class="nj-charts-cell" x="660.5" y="60" text-anchor="middle">0.78</text>
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<text class="nj-charts-cell" x="707.5" y="66" text-anchor="middle">1.00</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · write, checking less&#10;0.64× the time of the fastest fully validating library&#10;way: dump (source numbers)&#10;twitter.json: 139 µs (validates fully)&#10;citm_catalog.json: 229 µs (validates fully)&#10;canada.json: 831 µs (validates fully)&#10;jeopardy.json: 62,866 µs (validates fully)&#10;copies each number&#x27;s text instead of formatting it (number_format::source)">
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<text class="nj-charts-cell" x="752.5" y="60" text-anchor="middle">0.64</text>
<text class="nj-charts-cell nj-charts-cell--small" x="752.5" y="73" text-anchor="middle">N</text>
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<text class="nj-charts-rowlabel " x="216" y="102" text-anchor="end">yyjson</text>
<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · validate&#10;2.23× the time of the fastest library (fully validating)&#10;twitter.json: 393 µs · read&#10;citm_catalog.json: 930 µs · read (raw numbers)&#10;canada.json: 2,140 µs · read (raw numbers)&#10;jeopardy.json: 122,230 µs · insitu (copy)&#10;(copy): parses in place, on a copy of the input that is part of the time">
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<text class="nj-charts-cell" x="270" y="102" text-anchor="middle">2.23</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · sum&#10;1.31× the time of the fastest library (fully validating)&#10;way: read&#10;twitter.json: 445 µs&#10;citm_catalog.json: 1,093 µs&#10;canada.json: 3,948 µs&#10;jeopardy.json: 133,860 µs">
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<text class="nj-charts-cell" x="362" y="102" text-anchor="middle">1.31</text>
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<text class="nj-charts-cell" x="454" y="102" text-anchor="middle">1.37</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · edit&#10;1.43× the time of the fastest library (fully validating)&#10;twitter.json: 786 µs · mut copy&#10;citm_catalog.json: 1,642 µs · insitu (copy) + mut copy&#10;canada.json: 7,599 µs · insitu (copy) + mut copy&#10;jeopardy.json: 303,303 µs · mut copy&#10;(copy): parses in place, on a copy of the input that is part of the time">
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<text class="nj-charts-cell" x="546" y="102" text-anchor="middle">1.43</text>
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<text class="nj-charts-cell" x="660.5" y="96" text-anchor="middle">0.99</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="109" text-anchor="middle">N</text>
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<text class="nj-charts-cell" x="730" y="102" text-anchor="middle">1.08</text>
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<text class="nj-charts-rowlabel " x="216" y="138" text-anchor="end">sonic-cpp</text>
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<text class="nj-charts-cell" x="270" y="132" text-anchor="middle">2.32</text>
<text class="nj-charts-cell nj-charts-cell--small" x="270" y="145" text-anchor="middle">U</text>
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<text class="nj-charts-cell nj-charts-cell--small" x="362" y="145" text-anchor="middle">U</text>
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<text class="nj-charts-cell nj-charts-cell--small" x="454" y="145" text-anchor="middle">U</text>
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<text class="nj-charts-cell nj-charts-cell--small" x="546" y="145" text-anchor="middle">U</text>
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<text class="nj-charts-cell nj-charts-cell--small" x="638" y="145" text-anchor="middle">U</text>
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<text class="nj-charts-rowlabel " x="216" y="174" text-anchor="end">simdjson</text>
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<text class="nj-charts-cell" x="362" y="174" text-anchor="middle">1.00</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · select&#10;1.29× the time of the fastest library (fully validating)&#10;way: D&#8203;OM&#10;twitter.json: 311 µs&#10;citm_catalog.json: 698 µs&#10;canada.json: 3,141 µs&#10;jeopardy.json: 130,228 µs">
<rect class="nj-heat-1" x="409" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="174" text-anchor="middle">1.29</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · select, checking less&#10;0.55× the time of the fastest fully validating library&#10;twitter.json: 178 µs · On-Demand&#10;citm_catalog.json: 494 µs · On-Demand (key selectors)&#10;canada.json: 674 µs · On-Demand&#10;jeopardy.json: 48,492 µs · On-Demand&#10;reads lazily: On-Demand reads only what you ask for and steps over the rest by matching brackets">
<rect class="nj-heat-0" x="455" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="168" text-anchor="middle">0.55</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="181" text-anchor="middle">P</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · edit&#10;simdjson&#x27;s documents are read-only: it has no A&#8203;PI to change a value and write the result">
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<text class="nj-charts-tick" x="546" y="174">n/a</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · minify&#10;1.49× the time of the fastest library (fully validating)&#10;way: D&#8203;OM + to_string&#10;twitter.json: 666 µs&#10;citm_catalog.json: 1,354 µs&#10;canada.json: 8,606 µs&#10;jeopardy.json: 280,739 µs">
<rect class="nj-heat-1" x="593" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="174" text-anchor="middle">1.49</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · minify, checking less&#10;0.17× the time of the fastest fully validating library&#10;way: minify&#10;twitter.json: 93.3 µs&#10;citm_catalog.json: 279 µs&#10;canada.json: 314 µs&#10;jeopardy.json: 46,006 µs&#10;simdjson::minify() only removes whitespace, without parsing the values">
<rect class="nj-heat-0" x="639" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="168" text-anchor="middle">0.17</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="181" text-anchor="middle">P</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · write&#10;2.09× the time of the fastest library (fully validating)&#10;way: to_string&#10;twitter.json: 346 µs&#10;citm_catalog.json: 610 µs&#10;canada.json: 5,580 µs&#10;jeopardy.json: 158,670 µs">
<rect class="nj-heat-2" x="685" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="174" text-anchor="middle">2.09</text>
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<text class="nj-charts-rowlabel " x="216" y="210" text-anchor="end">sonic-rs (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · validate&#10;1.98× the time of the fastest library (fully validating)&#10;way: IgnoredAny&#10;twitter.json: 501 µs&#10;citm_catalog.json: 970 µs&#10;canada.json: 2,249 µs&#10;jeopardy.json: 54,369 µs">
<rect class="nj-heat-2" x="225" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="210" text-anchor="middle">1.98</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · sum&#10;1.14× the time of the fastest library (fully validating)&#10;way: visitor&#10;twitter.json: 501 µs&#10;citm_catalog.json: 1,123 µs&#10;canada.json: 4,397 µs&#10;jeopardy.json: 59,583 µs">
<rect class="nj-heat-0" x="317" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="210" text-anchor="middle">1.14</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · select&#10;1.36× the time of the fastest library (fully validating)&#10;way: structs&#10;twitter.json: 504 µs&#10;citm_catalog.json: 1,033 µs&#10;canada.json: 2,328 µs&#10;jeopardy.json: 90,486 µs">
<rect class="nj-heat-1" x="409" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="210" text-anchor="middle">1.36</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · edit&#10;1.87× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 1,197 µs&#10;citm_catalog.json: 2,389 µs&#10;canada.json: 7,744 µs&#10;jeopardy.json: 390,952 µs">
<rect class="nj-heat-2" x="501" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="210" text-anchor="middle">1.87</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · minify&#10;1.68× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 1,000 µs&#10;citm_catalog.json: 2,097 µs&#10;canada.json: 7,795 µs&#10;jeopardy.json: 215,280 µs">
<rect class="nj-heat-2" x="593" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="210" text-anchor="middle">1.68</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · write&#10;2.05× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 434 µs&#10;citm_catalog.json: 927 µs&#10;canada.json: 3,987 µs&#10;jeopardy.json: 109,176 µs">
<rect class="nj-heat-2" x="685" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="210" text-anchor="middle">2.05</text>
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<text class="nj-charts-rowlabel " x="216" y="246" text-anchor="end">Boost.J&#8203;SON</text>
<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · validate&#10;1.98× the time of the fastest library (fully validating)&#10;way: S&#8203;AX (numbers: none)&#10;twitter.json: 683 µs&#10;citm_catalog.json: 913 µs&#10;canada.json: 1,642 µs&#10;jeopardy.json: 57,932 µs">
<rect class="nj-heat-2" x="225" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="246" text-anchor="middle">1.98</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · sum&#10;1.29× the time of the fastest library (fully validating)&#10;way: S&#8203;AX&#10;twitter.json: 690 µs&#10;citm_catalog.json: 956 µs&#10;canada.json: 5,762 µs&#10;jeopardy.json: 62,051 µs">
<rect class="nj-heat-1" x="317" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="246" text-anchor="middle">1.29</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · select&#10;2.21× the time of the fastest library (fully validating)&#10;twitter.json: 883 µs · parse_into structs&#10;citm_catalog.json: 1,286 µs · parse_into structs&#10;canada.json: 6,690 µs · parse&#10;jeopardy.json: 101,286 µs · parse_into structs">
<rect class="nj-heat-2" x="409" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="246" text-anchor="middle">2.21</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · edit&#10;2.33× the time of the fastest library (fully validating)&#10;way: parse&#10;twitter.json: 1,859 µs&#10;citm_catalog.json: 2,513 µs&#10;canada.json: 12,765 µs&#10;jeopardy.json: 348,703 µs">
<rect class="nj-heat-2" x="501" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="246" text-anchor="middle">2.33</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · minify&#10;2.54× the time of the fastest library (fully validating)&#10;way: parse + serialize&#10;twitter.json: 1,783 µs&#10;citm_catalog.json: 2,498 µs&#10;canada.json: 12,367 µs&#10;jeopardy.json: 329,300 µs">
<rect class="nj-heat-3" x="593" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="246" text-anchor="middle">2.54</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · write&#10;2.33× the time of the fastest library (fully validating)&#10;way: serialize&#10;twitter.json: 451 µs&#10;citm_catalog.json: 832 µs&#10;canada.json: 5,570 µs&#10;jeopardy.json: 138,780 µs">
<rect class="nj-heat-2" x="685" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="246" text-anchor="middle">2.33</text>
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<text class="nj-charts-rowlabel nj-charts-name-json" x="216" y="282" text-anchor="end">nlohmann/json json</text>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · validate&#10;1.69× the time of the fastest library (fully validating)&#10;way: accept&#10;twitter.json: 370 µs&#10;citm_catalog.json: 883 µs&#10;canada.json: 2,441 µs&#10;jeopardy.json: 39,142 µs">
<rect class="nj-heat-2" x="225" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="282" text-anchor="middle">1.69</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · sum&#10;1.17× the time of the fastest library (fully validating)&#10;way: sax&#10;twitter.json: 533 µs&#10;citm_catalog.json: 1,113 µs&#10;canada.json: 4,134 µs&#10;jeopardy.json: 66,403 µs">
<rect class="nj-heat-1" x="317" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="282" text-anchor="middle">1.17</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · select&#10;6.20× the time of the fastest library (fully validating)&#10;twitter.json: 2,984 µs · parse&#10;citm_catalog.json: 4,548 µs · parse&#10;canada.json: 9,124 µs · structs (from_json)&#10;jeopardy.json: 383,108 µs · parse">
<rect class="nj-heat-4" x="409" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="282" text-anchor="middle">6.20</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · edit&#10;3.42× the time of the fastest library (fully validating)&#10;twitter.json: 2,535 µs · ordered_json&#10;citm_catalog.json: 4,484 µs · ordered_json&#10;canada.json: 13,526 µs · parse&#10;jeopardy.json: 635,912 µs · ordered_json">
<rect class="nj-heat-3" x="501" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="282" text-anchor="middle">3.42</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · minify&#10;4.07× the time of the fastest library (fully validating)&#10;way: parse + dump&#10;twitter.json: 3,369 µs&#10;citm_catalog.json: 5,399 µs&#10;canada.json: 13,402 µs&#10;jeopardy.json: 493,302 µs">
<rect class="nj-heat-3" x="593" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="282" text-anchor="middle">4.07</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · write&#10;1.84× the time of the fastest library (fully validating)&#10;way: dump&#10;twitter.json: 413 µs&#10;citm_catalog.json: 611 µs&#10;canada.json: 3,905 µs&#10;jeopardy.json: 113,990 µs">
<rect class="nj-heat-2" x="685" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="282" text-anchor="middle">1.84</text>
</g>
<text class="nj-charts-rowlabel " x="216" y="318" text-anchor="end">simd-json (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · validate&#10;3.71× the time of the fastest library (fully validating)&#10;way: tape (copy)&#10;twitter.json: 567 µs&#10;citm_catalog.json: 1,430 µs&#10;canada.json: 4,359 µs&#10;jeopardy.json: 207,551 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="225" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="318" text-anchor="middle">3.71</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · sum&#10;1.93× the time of the fastest library (fully validating)&#10;way: visitor (copy)&#10;twitter.json: 681 µs&#10;citm_catalog.json: 1,650 µs&#10;canada.json: 5,083 µs&#10;jeopardy.json: 210,185 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="317" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="318" text-anchor="middle">1.93</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · select&#10;2.59× the time of the fastest library (fully validating)&#10;way: structs (copy)&#10;twitter.json: 679 µs&#10;citm_catalog.json: 1,731 µs&#10;canada.json: 5,144 µs&#10;jeopardy.json: 239,164 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="409" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="318" text-anchor="middle">2.59</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · edit&#10;2.83× the time of the fastest library (fully validating)&#10;twitter.json: 1,862 µs · borrowed (copy)&#10;citm_catalog.json: 4,194 µs · borrowed (copy)&#10;canada.json: 14,896 µs · owned (copy)&#10;jeopardy.json: 391,369 µs · borrowed (copy)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="501" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="318" text-anchor="middle">2.83</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · minify&#10;3.30× the time of the fastest library (fully validating)&#10;way: borrowed (copy)&#10;twitter.json: 1,889 µs&#10;citm_catalog.json: 4,196 µs&#10;canada.json: 15,716 µs&#10;jeopardy.json: 414,377 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="593" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="318" text-anchor="middle">3.30</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · write&#10;2.34× the time of the fastest library (fully validating)&#10;way: borrowed&#10;twitter.json: 582 µs&#10;citm_catalog.json: 800 µs&#10;canada.json: 5,147 µs&#10;jeopardy.json: 122,623 µs">
<rect class="nj-heat-2" x="685" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="318" text-anchor="middle">2.34</text>
</g>
<text class="nj-charts-rowlabel " x="216" y="354" text-anchor="end">serde_json (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · validate&#10;2.46× the time of the fastest library (fully validating)&#10;way: from_utf8 + IgnoredAny&#10;twitter.json: 624 µs&#10;citm_catalog.json: 1,440 µs&#10;canada.json: 2,406 µs&#10;jeopardy.json: 64,720 µs">
<rect class="nj-heat-2" x="225" y="333" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="247.5" y="354" text-anchor="middle">2.46</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · validate, checking less&#10;2.19× the time of the fastest fully validating library&#10;way: IgnoredAny&#10;twitter.json: 484 µs&#10;citm_catalog.json: 1,370 µs&#10;canada.json: 2,314 µs&#10;jeopardy.json: 58,247 µs&#10;trusts U&#8203;TF-8 in the strings it skips (from_slice); strings it reads are checked">
<rect class="nj-heat-2" x="271" y="333" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="292.5" y="348" text-anchor="middle">2.19</text>
<text class="nj-charts-cell nj-charts-cell--small" x="292.5" y="361" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · sum&#10;2.38× the time of the fastest library (fully validating)&#10;way: visitor&#10;twitter.json: 1,311 µs&#10;citm_catalog.json: 2,288 µs&#10;canada.json: 7,127 µs&#10;jeopardy.json: 129,497 µs">
<rect class="nj-heat-2" x="317" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="354" text-anchor="middle">2.38</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · select&#10;1.74× the time of the fastest library (fully validating)&#10;way: from_utf8 + structs&#10;twitter.json: 701 µs&#10;citm_catalog.json: 1,532 µs&#10;canada.json: 2,529 µs&#10;jeopardy.json: 107,316 µs">
<rect class="nj-heat-2" x="409" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="354" text-anchor="middle">1.74</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · edit&#10;4.45× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 4,042 µs&#10;citm_catalog.json: 6,586 µs&#10;canada.json: 16,631 µs&#10;jeopardy.json: 632,766 µs">
<rect class="nj-heat-3" x="501" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="354" text-anchor="middle">4.45</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · minify&#10;4.80× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 4,012 µs&#10;citm_catalog.json: 6,583 µs&#10;canada.json: 17,306 µs&#10;jeopardy.json: 509,702 µs">
<rect class="nj-heat-3" x="593" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="354" text-anchor="middle">4.80</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · write&#10;2.27× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 550 µs&#10;citm_catalog.json: 887 µs&#10;canada.json: 4,005 µs&#10;jeopardy.json: 134,163 µs">
<rect class="nj-heat-2" x="685" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="354" text-anchor="middle">2.27</text>
</g>
<text class="nj-charts-rowlabel " x="216" y="390" text-anchor="end">RapidJSON</text>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · validate&#10;3.86× the time of the fastest library (fully validating)&#10;twitter.json: 1,215 µs · insitu (copy)&#10;citm_catalog.json: 1,550 µs · S&#8203;AX (string stream, default precision)&#10;canada.json: 3,625 µs · S&#8203;AX (string stream, default precision)&#10;jeopardy.json: 125,139 µs · S&#8203;AX (string stream, default precision)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="225" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="247.5" y="390" text-anchor="middle">3.86</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · validate, checking less&#10;3.48× the time of the fastest fully validating library&#10;twitter.json: 1,052 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,427 µs · S&#8203;AX (default precision) (no encoding check)&#10;canada.json: 3,625 µs · S&#8203;AX (string stream, default precision) (validates fully)&#10;jeopardy.json: 104,342 µs · S&#8203;AX (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="271" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="292.5" y="384" text-anchor="middle">3.48</text>
<text class="nj-charts-cell nj-charts-cell--small" x="292.5" y="397" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · sum&#10;2.35× the time of the fastest library (fully validating)&#10;twitter.json: 1,256 µs · insitu (copy)&#10;citm_catalog.json: 1,713 µs · S&#8203;AX (string stream)&#10;canada.json: 9,547 µs · S&#8203;AX (string stream)&#10;jeopardy.json: 127,564 µs · S&#8203;AX (string stream)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="317" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="339.5" y="390" text-anchor="middle">2.35</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · sum, checking less&#10;2.15× the time of the fastest fully validating library&#10;twitter.json: 1,099 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,635 µs · S&#8203;AX (string stream) (no encoding check)&#10;canada.json: 9,105 µs · S&#8203;AX (string stream) (no encoding check)&#10;jeopardy.json: 113,500 µs · S&#8203;AX (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="363" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="384.5" y="384" text-anchor="middle">2.15</text>
<text class="nj-charts-cell nj-charts-cell--small" x="384.5" y="397" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · select&#10;3.17× the time of the fastest library (fully validating)&#10;twitter.json: 1,217 µs · insitu (copy)&#10;citm_catalog.json: 1,807 µs · insitu (copy)&#10;canada.json: 9,688 µs · Document (string stream)&#10;jeopardy.json: 152,275 µs · Document (string stream)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="409" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="390" text-anchor="middle">3.17</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · select, checking less&#10;3.02× the time of the fastest fully validating library&#10;twitter.json: 1,056 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,767 µs · insitu (copy) (no encoding check)&#10;canada.json: 9,632 µs · Document (string stream) (no encoding check)&#10;jeopardy.json: 148,964 µs · Document (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="455" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="384" text-anchor="middle">3.02</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="397" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · edit&#10;2.49× the time of the fastest library (fully validating)&#10;twitter.json: 1,896 µs · insitu (copy)&#10;citm_catalog.json: 2,754 µs · insitu (copy)&#10;canada.json: 19,359 µs · Document (string stream)&#10;jeopardy.json: 269,071 µs · Document (string stream)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="501" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="523.5" y="390" text-anchor="middle">2.49</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · edit, checking less&#10;2.40× the time of the fastest fully validating library&#10;twitter.json: 1,749 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 2,730 µs · insitu (copy) (no encoding check)&#10;canada.json: 19,155 µs · Document (string stream) (no encoding check)&#10;jeopardy.json: 259,148 µs · Document (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="547" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="568.5" y="384" text-anchor="middle">2.40</text>
<text class="nj-charts-cell nj-charts-cell--small" x="568.5" y="397" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · minify&#10;2.58× the time of the fastest library (fully validating)&#10;way: S&#8203;AX to Writer (string stream)&#10;twitter.json: 1,851 µs&#10;citm_catalog.json: 2,429 µs&#10;canada.json: 18,810 µs&#10;jeopardy.json: 229,769 µs">
<rect class="nj-heat-3" x="593" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="390" text-anchor="middle">2.58</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · minify, checking less&#10;2.36× the time of the fastest fully validating library&#10;twitter.json: 1,710 µs · S&#8203;AX to Writer (string stream) (no encoding check)&#10;citm_catalog.json: 2,429 µs · S&#8203;AX to Writer (string stream) (validates fully)&#10;canada.json: 14,205 µs · S&#8203;AX to Writer (raw numbers) (validates fully)&#10;jeopardy.json: 229,769 µs · S&#8203;AX to Writer (string stream) (validates fully)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;copies each number&#x27;s text instead of formatting it (kParseNumbersAsStringsFlag)">
<rect class="nj-heat-2" x="639" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="384" text-anchor="middle">2.36</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="397" text-anchor="middle">U N</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · write&#10;2.94× the time of the fastest library (fully validating)&#10;way: Writer&#10;twitter.json: 638 µs&#10;citm_catalog.json: 984 µs&#10;canada.json: 8,886 µs&#10;jeopardy.json: 131,435 µs">
<rect class="nj-heat-3" x="685" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="390" text-anchor="middle">2.94</text>
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<text class="nj-charts-rowlabel " x="216" y="426" text-anchor="end">Glaze</text>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · validate&#10;2.87× the time of the fastest library (fully validating)&#10;way: validate_json&#10;twitter.json: 705 µs&#10;citm_catalog.json: 1,971 µs&#10;canada.json: 2,532 µs&#10;jeopardy.json: 74,805 µs">
<rect class="nj-heat-3" x="225" y="405" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="426" text-anchor="middle">2.87</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · sum&#10;4.05× the time of the fastest library (fully validating)&#10;way: generic (double, strict)&#10;twitter.json: 2,317 µs&#10;citm_catalog.json: 4,068 µs&#10;canada.json: 10,333 µs&#10;jeopardy.json: 237,723 µs">
<rect class="nj-heat-3" x="317" y="405" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="426" text-anchor="middle">4.05</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · select&#10;1.71× the time of the fastest library (fully validating)&#10;way: structs (validate_skipped)&#10;twitter.json: 608 µs&#10;citm_catalog.json: 1,978 µs&#10;canada.json: 2,521 µs&#10;jeopardy.json: 90,807 µs">
<rect class="nj-heat-2" x="409" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="426" text-anchor="middle">1.71</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · select, checking less&#10;0.59× the time of the fastest fully validating library&#10;way: structs&#10;twitter.json: 345 µs&#10;citm_catalog.json: 401 µs&#10;canada.json: 415 µs&#10;jeopardy.json: 67,456 µs&#10;reads into structs and steps over fields it doesn&#x27;t know without checking them (validate_skipped checks them too)">
<rect class="nj-heat-0" x="455" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="420" text-anchor="middle">0.59</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="433" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · edit&#10;4.48× the time of the fastest library (fully validating)&#10;way: generic (strict)&#10;twitter.json: 3,364 µs&#10;citm_catalog.json: 6,036 µs&#10;canada.json: 21,592 µs&#10;jeopardy.json: 652,302 µs">
<rect class="nj-heat-3" x="501" y="405" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="426" text-anchor="middle">4.48</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · minify&#10;4.56× the time of the fastest library (fully validating)&#10;way: generic (strict)&#10;twitter.json: 3,243 µs&#10;citm_catalog.json: 6,175 µs&#10;canada.json: 20,961 µs&#10;jeopardy.json: 451,368 µs">
<rect class="nj-heat-3" x="593" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="426" text-anchor="middle">4.56</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · minify, checking less&#10;0.75× the time of the fastest fully validating library&#10;way: minify_json&#10;twitter.json: 417 µs&#10;citm_catalog.json: 1,299 µs&#10;canada.json: 2,699 µs&#10;jeopardy.json: 93,794 µs&#10;minify_json only removes whitespace, without parsing the values">
<rect class="nj-heat-0" x="639" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="420" text-anchor="middle">0.75</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="433" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · write&#10;1.96× the time of the fastest library (fully validating)&#10;way: generic&#10;twitter.json: 377 µs&#10;citm_catalog.json: 730 µs&#10;canada.json: 4,050 µs&#10;jeopardy.json: 129,720 µs">
<rect class="nj-heat-2" x="685" y="405" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="426" text-anchor="middle">1.96</text>
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<text class="nj-charts-tick nj-charts-tick--l" x="8" y="472">time relative to the fastest fully validating library, less is better</text>
<g><rect class="nj-heat-0" x="8" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="46" y="496" text-anchor="middle">below 1.15</text></g>
<g><rect class="nj-heat-1" x="88" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="126" y="496" text-anchor="middle">1.15 to 1.5</text></g>
<g><rect class="nj-heat-2" x="168" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="206" y="496" text-anchor="middle">1.5 to 2.5</text></g>
<g><rect class="nj-heat-3" x="248" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="286" y="496" text-anchor="middle">2.5 to 5</text></g>
<g><rect class="nj-heat-4" x="328" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="366" y="496" text-anchor="middle">5 and more</text></g>
<rect class="nj-heat-na" x="420" y="482" width="40" height="20" rx="3"/>
<text class="nj-charts-tick" x="440" y="496">n/a</text>
<text class="nj-charts-tick nj-charts-tick--l" x="468" y="496">no A&#8203;PI for it</text>
</svg>
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<svg class="nj-fig nj-charts nj-charts--blog nj-charts--heat" viewBox="0 0 784 510" role="img" aria-labelledby="nj-blog-uc-x86-gcc13 nj-blog-uc-x86-gcc13-d" xmlns="http://www.w3.org/2000/svg">
<title id="nj-blog-uc-x86-gcc13">Use cases: time of each library relative to the fastest, x86-64 with G&#8203;CC 13</title>
<desc id="nj-blog-uc-x86-gcc13-d">Table of relative times, libraries by use case. nlohmann/json json_document validate: 1.00; nlohmann/json json_document sum: 1.10; nlohmann/json json_document select: 1.00; nlohmann/json json_document edit: 1.00 (0.82 doing less, N); nlohmann/json json_document minify: 1.00 (0.81 doing less, N); nlohmann/json json_document write: 1.00 (0.71 doing less, N); yyjson validate: 2.06; yyjson sum: 1.44; yyjson select: 1.37; yyjson edit: 1.57; yyjson minify: 1.37 (1.03 doing less, N); yyjson write: 1.08; sonic-cpp validate: no fully validating way (2.21 doing less, U); sonic-cpp sum: no fully validating way (1.28 doing less, U); sonic-cpp select: no fully validating way (1.48 doing less, U); sonic-cpp edit: no fully validating way (1.22 doing less, U); sonic-cpp minify: no fully validating way (1.40 doing less, U); sonic-cpp write: 1.50; simdjson validate: 1.93; simdjson sum: 1.00; simdjson select: 1.29 (0.56 doing less, P); simdjson edit: n/a; simdjson minify: 1.55 (0.21 doing less, P); simdjson write: 2.09; sonic-rs (Rust) validate: 1.77; sonic-rs (Rust) sum: 1.13; sonic-rs (Rust) select: 1.33; sonic-rs (Rust) edit: 1.86; sonic-rs (Rust) minify: 1.71; sonic-rs (Rust) write: 2.00; Boost.J&#8203;SON validate: 1.83; Boost.J&#8203;SON sum: 1.30; Boost.J&#8203;SON select: 2.23; Boost.J&#8203;SON edit: 2.45; Boost.J&#8203;SON minify: 2.83; Boost.J&#8203;SON write: 2.50; nlohmann/json json validate: 1.34; nlohmann/json json sum: 1.04; nlohmann/json json select: 6.05; nlohmann/json json edit: 3.37; nlohmann/json json minify: 4.13; nlohmann/json json write: 1.85; simd-json (Rust) validate: 3.31; simd-json (Rust) sum: 1.91; simd-json (Rust) select: 2.54; simd-json (Rust) edit: 2.82; simd-json (Rust) minify: 3.35; simd-json (Rust) write: 2.28; serde_json (Rust) validate: 2.19 (1.96 doing less, U); serde_json (Rust) sum: 2.35; serde_json (Rust) select: 1.70; serde_json (Rust) edit: 4.44; serde_json (Rust) minify: 4.88; serde_json (Rust) write: 2.21; Glaze validate: 2.05; Glaze sum: 4.06 (3.93 doing less, P); Glaze select: 1.39 (0.58 doing less, P); Glaze edit: 4.71; Glaze minify: 4.96 (0.70 doing less, P); Glaze write: 1.80; RapidJSON validate: 3.88 (3.36 doing less, U); RapidJSON sum: 2.67 (2.34 doing less, U); RapidJSON select: 3.39 (3.12 doing less, U); RapidJSON edit: 2.65 (2.52 doing less, U); RapidJSON minify: 3.64 (2.61 doing less, U N); RapidJSON write: 2.95.</desc>
<text class="nj-charts-tick" x="270" y="34">validate</text>
<text class="nj-charts-tick" x="362" y="34">sum</text>
<text class="nj-charts-tick" x="454" y="34">select</text>
<text class="nj-charts-tick" x="546" y="34">edit</text>
<text class="nj-charts-tick" x="638" y="34">minify</text>
<text class="nj-charts-tick" x="730" y="34">write</text>
<text class="nj-charts-rowlabel nj-charts-name-json" x="216" y="66" text-anchor="end">nlohmann/json json_document</text>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · validate&#10;1.00× the time of the fastest library (fully validating)&#10;way: accept&#10;twitter.json: 267 µs&#10;citm_catalog.json: 664 µs&#10;canada.json: 986 µs&#10;jeopardy.json: 34,874 µs">
<rect class="nj-heat-0" x="225" y="45" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="66" text-anchor="middle">1.00</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · sum&#10;1.10× the time of the fastest library (fully validating)&#10;way: parse&#10;twitter.json: 387 µs&#10;citm_catalog.json: 1,036 µs&#10;canada.json: 3,704 µs&#10;jeopardy.json: 89,477 µs">
<rect class="nj-heat-0" x="317" y="45" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="66" text-anchor="middle">1.10</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · select&#10;1.00× the time of the fastest library (fully validating)&#10;twitter.json: 329 µs · structs (from_json)&#10;citm_catalog.json: 855 µs · parse&#10;canada.json: 1,360 µs · structs (from_json)&#10;jeopardy.json: 90,597 µs · parse">
<rect class="nj-heat-0" x="409" y="45" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="66" text-anchor="middle">1.00</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · edit&#10;1.00× the time of the fastest library (fully validating)&#10;way: editable&#10;twitter.json: 530 µs&#10;citm_catalog.json: 1,209 µs&#10;canada.json: 5,792 µs&#10;jeopardy.json: 193,925 µs">
<rect class="nj-heat-0" x="501" y="45" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="523.5" y="66" text-anchor="middle">1.00</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · edit, checking less&#10;0.82× the time of the fastest fully validating library&#10;twitter.json: 530 µs · editable (validates fully)&#10;citm_catalog.json: 1,209 µs · editable (validates fully)&#10;canada.json: 2,621 µs · editable (source numbers) (validates fully)&#10;jeopardy.json: 193,925 µs · editable (validates fully)&#10;copies each number&#x27;s text instead of formatting it (number_format::source)">
<rect class="nj-heat-0" x="547" y="45" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="568.5" y="60" text-anchor="middle">0.82</text>
<text class="nj-charts-cell nj-charts-cell--small" x="568.5" y="73" text-anchor="middle">N</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · minify&#10;1.00× the time of the fastest library (fully validating)&#10;way: parse + dump&#10;twitter.json: 475 µs&#10;citm_catalog.json: 1,102 µs&#10;canada.json: 5,414 µs&#10;jeopardy.json: 144,877 µs">
<rect class="nj-heat-0" x="593" y="45" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="66" text-anchor="middle">1.00</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · minify, checking less&#10;0.81× the time of the fastest fully validating library&#10;twitter.json: 471 µs · parse + dump (source numbers) (validates fully)&#10;citm_catalog.json: 1,102 µs · parse + dump (validates fully)&#10;canada.json: 2,372 µs · parse + dump (source numbers) (validates fully)&#10;jeopardy.json: 144,877 µs · parse + dump (validates fully)&#10;copies each number&#x27;s text instead of formatting it (number_format::source)">
<rect class="nj-heat-0" x="639" y="45" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="60" text-anchor="middle">0.81</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="73" text-anchor="middle">N</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · write&#10;1.00× the time of the fastest library (fully validating)&#10;way: dump&#10;twitter.json: 152 µs&#10;citm_catalog.json: 260 µs&#10;canada.json: 3,811 µs&#10;jeopardy.json: 72,196 µs">
<rect class="nj-heat-0" x="685" y="45" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="707.5" y="66" text-anchor="middle">1.00</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json_document · write, checking less&#10;0.71× the time of the fastest fully validating library&#10;twitter.json: 147 µs · dump (source numbers) (validates fully)&#10;citm_catalog.json: 260 µs · dump (validates fully)&#10;canada.json: 997 µs · dump (source numbers) (validates fully)&#10;jeopardy.json: 71,822 µs · dump (source numbers) (validates fully)&#10;copies each number&#x27;s text instead of formatting it (number_format::source)">
<rect class="nj-heat-0" x="731" y="45" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="752.5" y="60" text-anchor="middle">0.71</text>
<text class="nj-charts-cell nj-charts-cell--small" x="752.5" y="73" text-anchor="middle">N</text>
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<text class="nj-charts-rowlabel " x="216" y="102" text-anchor="end">yyjson</text>
<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · validate&#10;2.06× the time of the fastest library (fully validating)&#10;twitter.json: 394 µs · insitu (copy)&#10;citm_catalog.json: 984 µs · read&#10;canada.json: 2,222 µs · read (raw numbers)&#10;jeopardy.json: 128,528 µs · insitu (copy)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="225" y="81" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="102" text-anchor="middle">2.06</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · sum&#10;1.44× the time of the fastest library (fully validating)&#10;twitter.json: 443 µs · insitu (copy)&#10;citm_catalog.json: 1,146 µs · insitu (copy)&#10;canada.json: 5,974 µs · read&#10;jeopardy.json: 129,054 µs · read&#10;(copy): parses in place, on a copy of the input that is part of the time">
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<text class="nj-charts-cell" x="362" y="102" text-anchor="middle">1.44</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · select&#10;1.37× the time of the fastest library (fully validating)&#10;twitter.json: 397 µs · read&#10;citm_catalog.json: 994 µs · insitu (copy)&#10;canada.json: 2,228 µs · read (raw numbers)&#10;jeopardy.json: 140,073 µs · read (raw numbers)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-1" x="409" y="81" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="102" text-anchor="middle">1.37</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · edit&#10;1.57× the time of the fastest library (fully validating)&#10;twitter.json: 841 µs · insitu (copy) + mut copy&#10;citm_catalog.json: 1,719 µs · mut copy&#10;canada.json: 9,803 µs · insitu (copy) + mut copy&#10;jeopardy.json: 309,935 µs · insitu (copy) + mut copy&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="501" y="81" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="102" text-anchor="middle">1.57</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · minify&#10;1.37× the time of the fastest library (fully validating)&#10;twitter.json: 600 µs · insitu (copy) + write&#10;citm_catalog.json: 1,316 µs · insitu (copy) + write&#10;canada.json: 9,151 µs · read + write&#10;jeopardy.json: 201,645 µs · read + write&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-1" x="593" y="81" width="44" height="34" rx="3"/>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · minify, checking less&#10;1.03× the time of the fastest fully validating library&#10;twitter.json: 600 µs · read (raw numbers) + write (validates fully)&#10;citm_catalog.json: 1,264 µs · read (raw numbers) + write (validates fully)&#10;canada.json: 2,994 µs · read (raw numbers) + write (validates fully)&#10;jeopardy.json: 201,645 µs · read + write (validates fully)&#10;copies each number&#x27;s text instead of formatting it (YYJSON_READ_NUMBER_AS_RAW)">
<rect class="nj-heat-0" x="639" y="81" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="96" text-anchor="middle">1.03</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="109" text-anchor="middle">N</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="yyjson · write&#10;1.08× the time of the fastest library (fully validating)&#10;way: write&#10;twitter.json: 180 µs&#10;citm_catalog.json: 325 µs&#10;canada.json: 3,548 µs&#10;jeopardy.json: 71,044 µs">
<rect class="nj-heat-0" x="685" y="81" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="102" text-anchor="middle">1.08</text>
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<text class="nj-charts-rowlabel " x="216" y="138" text-anchor="end">sonic-cpp</text>
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<rect class="nj-heat-2" x="225" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="132" text-anchor="middle">2.21</text>
<text class="nj-charts-cell nj-charts-cell--small" x="270" y="145" text-anchor="middle">U</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · sum, checking less&#10;1.28× the time of the fastest fully validating library&#10;way: Document&#10;twitter.json: 459 µs&#10;citm_catalog.json: 1,209 µs&#10;canada.json: 4,247 µs&#10;jeopardy.json: 103,731 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-1" x="317" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="132" text-anchor="middle">1.28</text>
<text class="nj-charts-cell nj-charts-cell--small" x="362" y="145" text-anchor="middle">U</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · select, checking less&#10;1.48× the time of the fastest fully validating library&#10;way: Document&#10;twitter.json: 412 µs&#10;citm_catalog.json: 1,044 µs&#10;canada.json: 3,632 µs&#10;jeopardy.json: 106,188 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-1" x="409" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="132" text-anchor="middle">1.48</text>
<text class="nj-charts-cell nj-charts-cell--small" x="454" y="145" text-anchor="middle">U</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · edit, checking less&#10;1.22× the time of the fastest fully validating library&#10;way: Document&#10;twitter.json: 632 µs&#10;citm_catalog.json: 1,583 µs&#10;canada.json: 8,734 µs&#10;jeopardy.json: 184,592 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-1" x="501" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="132" text-anchor="middle">1.22</text>
<text class="nj-charts-cell nj-charts-cell--small" x="546" y="145" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · minify, checking less&#10;1.40× the time of the fastest fully validating library&#10;way: Document + Serialize&#10;twitter.json: 647 µs&#10;citm_catalog.json: 1,563 µs&#10;canada.json: 8,917 µs&#10;jeopardy.json: 176,625 µs&#10;trusts U&#8203;TF-8: sonic-cpp 1.0.2 doesn&#x27;t check it">
<rect class="nj-heat-1" x="593" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="132" text-anchor="middle">1.40</text>
<text class="nj-charts-cell nj-charts-cell--small" x="638" y="145" text-anchor="middle">U</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-cpp · write&#10;1.50× the time of the fastest library (fully validating)&#10;way: Serialize&#10;twitter.json: 268 µs&#10;citm_catalog.json: 543 µs&#10;canada.json: 5,057 µs&#10;jeopardy.json: 75,734 µs">
<rect class="nj-heat-2" x="685" y="117" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="138" text-anchor="middle">1.50</text>
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<text class="nj-charts-rowlabel " x="216" y="174" text-anchor="end">simdjson</text>
<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · validate&#10;1.93× the time of the fastest library (fully validating)&#10;way: D&#8203;OM&#10;twitter.json: 309 µs&#10;citm_catalog.json: 737 µs&#10;canada.json: 3,183 µs&#10;jeopardy.json: 115,296 µs">
<rect class="nj-heat-2" x="225" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="174" text-anchor="middle">1.93</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · sum&#10;1.00× the time of the fastest library (fully validating)&#10;way: On-Demand&#10;twitter.json: 356 µs&#10;citm_catalog.json: 819 µs&#10;canada.json: 3,291 µs&#10;jeopardy.json: 94,267 µs">
<rect class="nj-heat-0" x="317" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="174" text-anchor="middle">1.00</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · select&#10;1.29× the time of the fastest library (fully validating)&#10;way: D&#8203;OM&#10;twitter.json: 323 µs&#10;citm_catalog.json: 748 µs&#10;canada.json: 3,189 µs&#10;jeopardy.json: 126,288 µs">
<rect class="nj-heat-1" x="409" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="174" text-anchor="middle">1.29</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · select, checking less&#10;0.56× the time of the fastest fully validating library&#10;twitter.json: 186 µs · On-Demand&#10;citm_catalog.json: 508 µs · On-Demand&#10;canada.json: 707 µs · On-Demand&#10;jeopardy.json: 50,215 µs · On-Demand (key selectors)&#10;reads lazily: On-Demand reads only what you ask for and steps over the rest by matching brackets">
<rect class="nj-heat-0" x="455" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="168" text-anchor="middle">0.56</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="181" text-anchor="middle">P</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · edit&#10;simdjson&#x27;s documents are read-only: it has no A&#8203;PI to change a value and write the result">
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<text class="nj-charts-tick" x="546" y="174">n/a</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · minify&#10;1.55× the time of the fastest library (fully validating)&#10;way: D&#8203;OM + to_string&#10;twitter.json: 689 µs&#10;citm_catalog.json: 1,394 µs&#10;canada.json: 8,457 µs&#10;jeopardy.json: 292,576 µs">
<rect class="nj-heat-2" x="593" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="174" text-anchor="middle">1.55</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · minify, checking less&#10;0.21× the time of the fastest fully validating library&#10;way: minify&#10;twitter.json: 122 µs&#10;citm_catalog.json: 336 µs&#10;canada.json: 426 µs&#10;jeopardy.json: 49,731 µs&#10;simdjson::minify() only removes whitespace, without parsing the values">
<rect class="nj-heat-0" x="639" y="153" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="168" text-anchor="middle">0.21</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="181" text-anchor="middle">P</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simdjson · write&#10;2.09× the time of the fastest library (fully validating)&#10;way: to_string&#10;twitter.json: 360 µs&#10;citm_catalog.json: 636 µs&#10;canada.json: 5,363 µs&#10;jeopardy.json: 169,032 µs">
<rect class="nj-heat-2" x="685" y="153" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="174" text-anchor="middle">2.09</text>
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<text class="nj-charts-rowlabel " x="216" y="210" text-anchor="end">sonic-rs (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · validate&#10;1.77× the time of the fastest library (fully validating)&#10;way: IgnoredAny&#10;twitter.json: 501 µs&#10;citm_catalog.json: 970 µs&#10;canada.json: 2,249 µs&#10;jeopardy.json: 54,369 µs">
<rect class="nj-heat-2" x="225" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="210" text-anchor="middle">1.77</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · sum&#10;1.13× the time of the fastest library (fully validating)&#10;way: visitor&#10;twitter.json: 501 µs&#10;citm_catalog.json: 1,123 µs&#10;canada.json: 4,397 µs&#10;jeopardy.json: 59,583 µs">
<rect class="nj-heat-0" x="317" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="210" text-anchor="middle">1.13</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · select&#10;1.33× the time of the fastest library (fully validating)&#10;way: structs&#10;twitter.json: 504 µs&#10;citm_catalog.json: 1,033 µs&#10;canada.json: 2,328 µs&#10;jeopardy.json: 90,486 µs">
<rect class="nj-heat-1" x="409" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="210" text-anchor="middle">1.33</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · edit&#10;1.86× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 1,197 µs&#10;citm_catalog.json: 2,389 µs&#10;canada.json: 7,744 µs&#10;jeopardy.json: 390,952 µs">
<rect class="nj-heat-2" x="501" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="210" text-anchor="middle">1.86</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · minify&#10;1.71× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 1,000 µs&#10;citm_catalog.json: 2,097 µs&#10;canada.json: 7,795 µs&#10;jeopardy.json: 215,280 µs">
<rect class="nj-heat-2" x="593" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="210" text-anchor="middle">1.71</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="sonic-rs (Rust) · write&#10;2.00× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 434 µs&#10;citm_catalog.json: 927 µs&#10;canada.json: 3,987 µs&#10;jeopardy.json: 109,176 µs">
<rect class="nj-heat-2" x="685" y="189" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="210" text-anchor="middle">2.00</text>
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<text class="nj-charts-rowlabel " x="216" y="246" text-anchor="end">Boost.J&#8203;SON</text>
<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · validate&#10;1.83× the time of the fastest library (fully validating)&#10;twitter.json: 730 µs · S&#8203;AX (numbers: none)&#10;citm_catalog.json: 934 µs · S&#8203;AX (numbers: none)&#10;canada.json: 1,637 µs · S&#8203;AX (numbers: none)&#10;jeopardy.json: 60,745 µs · S&#8203;AX">
<rect class="nj-heat-2" x="225" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="246" text-anchor="middle">1.83</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · sum&#10;1.30× the time of the fastest library (fully validating)&#10;way: S&#8203;AX&#10;twitter.json: 746 µs&#10;citm_catalog.json: 1,025 µs&#10;canada.json: 5,370 µs&#10;jeopardy.json: 63,333 µs">
<rect class="nj-heat-1" x="317" y="225" width="90" height="34" rx="3"/>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · select&#10;2.23× the time of the fastest library (fully validating)&#10;twitter.json: 899 µs · parse_into structs&#10;citm_catalog.json: 1,353 µs · parse_into structs&#10;canada.json: 7,011 µs · parse&#10;jeopardy.json: 100,039 µs · parse_into structs">
<rect class="nj-heat-2" x="409" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="246" text-anchor="middle">2.23</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · edit&#10;2.45× the time of the fastest library (fully validating)&#10;way: parse&#10;twitter.json: 1,889 µs&#10;citm_catalog.json: 2,952 µs&#10;canada.json: 13,537 µs&#10;jeopardy.json: 346,542 µs">
<rect class="nj-heat-2" x="501" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="246" text-anchor="middle">2.45</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · minify&#10;2.83× the time of the fastest library (fully validating)&#10;way: parse + serialize&#10;twitter.json: 1,907 µs&#10;citm_catalog.json: 2,950 µs&#10;canada.json: 13,662 µs&#10;jeopardy.json: 342,183 µs">
<rect class="nj-heat-3" x="593" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="246" text-anchor="middle">2.83</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Boost.J&#8203;SON · write&#10;2.50× the time of the fastest library (fully validating)&#10;way: serialize&#10;twitter.json: 474 µs&#10;citm_catalog.json: 1,003 µs&#10;canada.json: 6,012 µs&#10;jeopardy.json: 148,120 µs">
<rect class="nj-heat-2" x="685" y="225" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="246" text-anchor="middle">2.50</text>
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<text class="nj-charts-rowlabel nj-charts-name-json" x="216" y="282" text-anchor="end">nlohmann/json json</text>
<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · validate&#10;1.34× the time of the fastest library (fully validating)&#10;way: accept&#10;twitter.json: 312 µs&#10;citm_catalog.json: 686 µs&#10;canada.json: 2,345 µs&#10;jeopardy.json: 38,948 µs">
<rect class="nj-heat-1" x="225" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="282" text-anchor="middle">1.34</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · sum&#10;1.04× the time of the fastest library (fully validating)&#10;way: sax&#10;twitter.json: 451 µs&#10;citm_catalog.json: 941 µs&#10;canada.json: 3,816 µs&#10;jeopardy.json: 64,406 µs">
<rect class="nj-heat-0" x="317" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="282" text-anchor="middle">1.04</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · select&#10;6.05× the time of the fastest library (fully validating)&#10;way: parse&#10;twitter.json: 3,032 µs&#10;citm_catalog.json: 4,466 µs&#10;canada.json: 9,085 µs&#10;jeopardy.json: 376,812 µs">
<rect class="nj-heat-4" x="409" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="282" text-anchor="middle">6.05</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · edit&#10;3.37× the time of the fastest library (fully validating)&#10;twitter.json: 2,503 µs · ordered_json&#10;citm_catalog.json: 4,414 µs · ordered_json&#10;canada.json: 13,479 µs · parse&#10;jeopardy.json: 622,816 µs · ordered_json">
<rect class="nj-heat-3" x="501" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="282" text-anchor="middle">3.37</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · minify&#10;4.13× the time of the fastest library (fully validating)&#10;way: parse + dump&#10;twitter.json: 3,417 µs&#10;citm_catalog.json: 5,153 µs&#10;canada.json: 13,425 µs&#10;jeopardy.json: 504,511 µs">
<rect class="nj-heat-3" x="593" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="282" text-anchor="middle">4.13</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="nlohmann/json json · write&#10;1.85× the time of the fastest library (fully validating)&#10;way: dump&#10;twitter.json: 413 µs&#10;citm_catalog.json: 617 µs&#10;canada.json: 4,036 µs&#10;jeopardy.json: 124,865 µs">
<rect class="nj-heat-2" x="685" y="261" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="282" text-anchor="middle">1.85</text>
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<text class="nj-charts-rowlabel " x="216" y="318" text-anchor="end">simd-json (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · validate&#10;3.31× the time of the fastest library (fully validating)&#10;way: tape (copy)&#10;twitter.json: 567 µs&#10;citm_catalog.json: 1,430 µs&#10;canada.json: 4,359 µs&#10;jeopardy.json: 207,551 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="225" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="318" text-anchor="middle">3.31</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · sum&#10;1.91× the time of the fastest library (fully validating)&#10;way: visitor (copy)&#10;twitter.json: 681 µs&#10;citm_catalog.json: 1,650 µs&#10;canada.json: 5,083 µs&#10;jeopardy.json: 210,185 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="317" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="318" text-anchor="middle">1.91</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · select&#10;2.54× the time of the fastest library (fully validating)&#10;way: structs (copy)&#10;twitter.json: 679 µs&#10;citm_catalog.json: 1,731 µs&#10;canada.json: 5,144 µs&#10;jeopardy.json: 239,164 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="409" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="454" y="318" text-anchor="middle">2.54</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · edit&#10;2.82× the time of the fastest library (fully validating)&#10;twitter.json: 1,862 µs · borrowed (copy)&#10;citm_catalog.json: 4,194 µs · borrowed (copy)&#10;canada.json: 14,896 µs · owned (copy)&#10;jeopardy.json: 391,369 µs · borrowed (copy)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="501" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="318" text-anchor="middle">2.82</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · minify&#10;3.35× the time of the fastest library (fully validating)&#10;way: borrowed (copy)&#10;twitter.json: 1,889 µs&#10;citm_catalog.json: 4,196 µs&#10;canada.json: 15,716 µs&#10;jeopardy.json: 414,377 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="593" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="318" text-anchor="middle">3.35</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="simd-json (Rust) · write&#10;2.28× the time of the fastest library (fully validating)&#10;way: borrowed&#10;twitter.json: 582 µs&#10;citm_catalog.json: 800 µs&#10;canada.json: 5,147 µs&#10;jeopardy.json: 122,623 µs">
<rect class="nj-heat-2" x="685" y="297" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="318" text-anchor="middle">2.28</text>
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<text class="nj-charts-rowlabel " x="216" y="354" text-anchor="end">serde_json (Rust)</text>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · validate&#10;2.19× the time of the fastest library (fully validating)&#10;way: from_utf8 + IgnoredAny&#10;twitter.json: 624 µs&#10;citm_catalog.json: 1,440 µs&#10;canada.json: 2,406 µs&#10;jeopardy.json: 64,720 µs">
<rect class="nj-heat-2" x="225" y="333" width="44" height="34" rx="3"/>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · validate, checking less&#10;1.96× the time of the fastest fully validating library&#10;way: IgnoredAny&#10;twitter.json: 484 µs&#10;citm_catalog.json: 1,370 µs&#10;canada.json: 2,314 µs&#10;jeopardy.json: 58,247 µs&#10;trusts U&#8203;TF-8 in the strings it skips (from_slice); strings it reads are checked">
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<text class="nj-charts-cell" x="292.5" y="348" text-anchor="middle">1.96</text>
<text class="nj-charts-cell nj-charts-cell--small" x="292.5" y="361" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · sum&#10;2.35× the time of the fastest library (fully validating)&#10;way: visitor&#10;twitter.json: 1,311 µs&#10;citm_catalog.json: 2,288 µs&#10;canada.json: 7,127 µs&#10;jeopardy.json: 129,497 µs">
<rect class="nj-heat-2" x="317" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="362" y="354" text-anchor="middle">2.35</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · select&#10;1.70× the time of the fastest library (fully validating)&#10;way: from_utf8 + structs&#10;twitter.json: 701 µs&#10;citm_catalog.json: 1,532 µs&#10;canada.json: 2,529 µs&#10;jeopardy.json: 107,316 µs">
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · edit&#10;4.44× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 4,042 µs&#10;citm_catalog.json: 6,586 µs&#10;canada.json: 16,631 µs&#10;jeopardy.json: 632,766 µs">
<rect class="nj-heat-3" x="501" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="354" text-anchor="middle">4.44</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · minify&#10;4.88× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 4,012 µs&#10;citm_catalog.json: 6,583 µs&#10;canada.json: 17,306 µs&#10;jeopardy.json: 509,702 µs">
<rect class="nj-heat-3" x="593" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="638" y="354" text-anchor="middle">4.88</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="serde_json (Rust) · write&#10;2.21× the time of the fastest library (fully validating)&#10;way: Value&#10;twitter.json: 550 µs&#10;citm_catalog.json: 887 µs&#10;canada.json: 4,005 µs&#10;jeopardy.json: 134,163 µs">
<rect class="nj-heat-2" x="685" y="333" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="354" text-anchor="middle">2.21</text>
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<text class="nj-charts-rowlabel " x="216" y="390" text-anchor="end">Glaze</text>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · validate&#10;2.05× the time of the fastest library (fully validating)&#10;way: validate_json&#10;twitter.json: 584 µs&#10;citm_catalog.json: 1,402 µs&#10;canada.json: 1,837 µs&#10;jeopardy.json: 71,382 µs">
<rect class="nj-heat-2" x="225" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="270" y="390" text-anchor="middle">2.05</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · sum&#10;4.06× the time of the fastest library (fully validating)&#10;way: generic (double, strict)&#10;twitter.json: 2,341 µs&#10;citm_catalog.json: 4,037 µs&#10;canada.json: 10,434 µs&#10;jeopardy.json: 249,828 µs">
<rect class="nj-heat-3" x="317" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="339.5" y="390" text-anchor="middle">4.06</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · sum, checking less&#10;3.93× the time of the fastest fully validating library&#10;twitter.json: 2,341 µs · generic (double, strict) (validates fully)&#10;citm_catalog.json: 4,037 µs · generic (double, strict) (validates fully)&#10;canada.json: 10,434 µs · generic (double, strict) (validates fully)&#10;jeopardy.json: 219,119 µs · lazy_json&#10;reads lazily: lazy_json reads only what you ask for and steps over the rest">
<rect class="nj-heat-3" x="363" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="384.5" y="384" text-anchor="middle">3.93</text>
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<rect class="nj-heat-1" x="409" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="390" text-anchor="middle">1.39</text>
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<rect class="nj-heat-0" x="455" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="384" text-anchor="middle">0.58</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="397" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · edit&#10;4.71× the time of the fastest library (fully validating)&#10;way: generic (strict)&#10;twitter.json: 3,474 µs&#10;citm_catalog.json: 6,531 µs&#10;canada.json: 23,193 µs&#10;jeopardy.json: 673,526 µs">
<rect class="nj-heat-3" x="501" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="546" y="390" text-anchor="middle">4.71</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · minify&#10;4.96× the time of the fastest library (fully validating)&#10;way: generic (strict)&#10;twitter.json: 3,359 µs&#10;citm_catalog.json: 6,437 µs&#10;canada.json: 23,896 µs&#10;jeopardy.json: 480,814 µs">
<rect class="nj-heat-3" x="593" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="390" text-anchor="middle">4.96</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · minify, checking less&#10;0.70× the time of the fastest fully validating library&#10;way: minify_json&#10;twitter.json: 417 µs&#10;citm_catalog.json: 1,116 µs&#10;canada.json: 2,113 µs&#10;jeopardy.json: 97,812 µs&#10;minify_json only removes whitespace, without parsing the values">
<rect class="nj-heat-0" x="639" y="369" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="384" text-anchor="middle">0.70</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="397" text-anchor="middle">P</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="Glaze · write&#10;1.80× the time of the fastest library (fully validating)&#10;way: generic&#10;twitter.json: 336 µs&#10;citm_catalog.json: 682 µs&#10;canada.json: 3,750 µs&#10;jeopardy.json: 133,730 µs">
<rect class="nj-heat-2" x="685" y="369" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="390" text-anchor="middle">1.80</text>
</g>
<text class="nj-charts-rowlabel " x="216" y="426" text-anchor="end">RapidJSON</text>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · validate&#10;3.88× the time of the fastest library (fully validating)&#10;twitter.json: 1,201 µs · insitu (copy)&#10;citm_catalog.json: 1,931 µs · insitu (copy)&#10;canada.json: 4,114 µs · S&#8203;AX (string stream, default precision)&#10;jeopardy.json: 145,137 µs · insitu (copy)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="225" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="247.5" y="426" text-anchor="middle">3.88</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · validate, checking less&#10;3.36× the time of the fastest fully validating library&#10;twitter.json: 1,033 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,487 µs · S&#8203;AX (default precision) (no encoding check)&#10;canada.json: 3,966 µs · S&#8203;AX (string stream, default precision) (no encoding check)&#10;jeopardy.json: 127,587 µs · S&#8203;AX (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="271" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="292.5" y="420" text-anchor="middle">3.36</text>
<text class="nj-charts-cell nj-charts-cell--small" x="292.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · sum&#10;2.67× the time of the fastest library (fully validating)&#10;twitter.json: 1,256 µs · insitu (copy)&#10;citm_catalog.json: 2,114 µs · insitu (copy)&#10;canada.json: 11,059 µs · S&#8203;AX (string stream)&#10;jeopardy.json: 155,532 µs · insitu (copy)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="317" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="339.5" y="426" text-anchor="middle">2.67</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · sum, checking less&#10;2.34× the time of the fastest fully validating library&#10;twitter.json: 1,085 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,750 µs · S&#8203;AX (no encoding check)&#10;canada.json: 11,008 µs · S&#8203;AX (string stream) (no encoding check)&#10;jeopardy.json: 128,734 µs · S&#8203;AX (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-2" x="363" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="384.5" y="420" text-anchor="middle">2.34</text>
<text class="nj-charts-cell nj-charts-cell--small" x="384.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · select&#10;3.39× the time of the fastest library (fully validating)&#10;way: insitu (copy)&#10;twitter.json: 1,207 µs&#10;citm_catalog.json: 1,947 µs&#10;canada.json: 11,910 µs&#10;jeopardy.json: 164,386 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="409" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="431.5" y="426" text-anchor="middle">3.39</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · select, checking less&#10;3.12× the time of the fastest fully validating library&#10;twitter.json: 1,037 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 1,847 µs · insitu (copy) (no encoding check)&#10;canada.json: 11,692 µs · Document (no encoding check)&#10;jeopardy.json: 147,489 µs · insitu (copy) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="455" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="476.5" y="420" text-anchor="middle">3.12</text>
<text class="nj-charts-cell nj-charts-cell--small" x="476.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · edit&#10;2.65× the time of the fastest library (fully validating)&#10;way: insitu (copy)&#10;twitter.json: 1,920 µs&#10;citm_catalog.json: 2,977 µs&#10;canada.json: 21,152 µs&#10;jeopardy.json: 293,851 µs&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="501" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="523.5" y="426" text-anchor="middle">2.65</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · edit, checking less&#10;2.52× the time of the fastest fully validating library&#10;twitter.json: 1,747 µs · insitu (copy) (no encoding check)&#10;citm_catalog.json: 2,823 µs · insitu (copy) (no encoding check)&#10;canada.json: 20,998 µs · Document (no encoding check)&#10;jeopardy.json: 280,165 µs · insitu (copy) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;(copy): parses in place, on a copy of the input that is part of the time">
<rect class="nj-heat-3" x="547" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="568.5" y="420" text-anchor="middle">2.52</text>
<text class="nj-charts-cell nj-charts-cell--small" x="568.5" y="433" text-anchor="middle">U</text>
</g>
<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · minify&#10;3.64× the time of the fastest library (fully validating)&#10;twitter.json: 2,746 µs · S&#8203;AX to Writer (string stream)&#10;citm_catalog.json: 3,162 µs · S&#8203;AX to Writer (string stream)&#10;canada.json: 21,674 µs · S&#8203;AX to Writer&#10;jeopardy.json: 381,832 µs · S&#8203;AX to Writer (string stream)">
<rect class="nj-heat-3" x="593" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="615.5" y="426" text-anchor="middle">3.64</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · minify, checking less&#10;2.61× the time of the fastest fully validating library&#10;twitter.json: 1,824 µs · S&#8203;AX to Writer (string stream) (no encoding check)&#10;citm_catalog.json: 2,672 µs · S&#8203;AX to Writer (string stream) (no encoding check)&#10;canada.json: 15,166 µs · S&#8203;AX to Writer (raw numbers) (no encoding check)&#10;jeopardy.json: 259,100 µs · S&#8203;AX to Writer (string stream) (no encoding check)&#10;trusts U&#8203;TF-8: RapidJSON&#x27;s default (kParseValidateEncodingFlag checks it)&#10;copies each number&#x27;s text instead of formatting it (kParseNumbersAsStringsFlag)">
<rect class="nj-heat-3" x="639" y="405" width="44" height="34" rx="3"/>
<text class="nj-charts-cell" x="660.5" y="420" text-anchor="middle">2.61</text>
<text class="nj-charts-cell nj-charts-cell--small" x="660.5" y="433" text-anchor="middle">U N</text>
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<g class="nj-heat-cell" tabindex="0" data-tip="RapidJSON · write&#10;2.95× the time of the fastest library (fully validating)&#10;way: Writer&#10;twitter.json: 661 µs&#10;citm_catalog.json: 1,015 µs&#10;canada.json: 8,980 µs&#10;jeopardy.json: 136,957 µs">
<rect class="nj-heat-3" x="685" y="405" width="90" height="34" rx="3"/>
<text class="nj-charts-cell" x="730" y="426" text-anchor="middle">2.95</text>
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<text class="nj-charts-tick nj-charts-tick--l" x="8" y="472">time relative to the fastest fully validating library, less is better</text>
<g><rect class="nj-heat-0" x="8" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="46" y="496" text-anchor="middle">below 1.15</text></g>
<g><rect class="nj-heat-1" x="88" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="126" y="496" text-anchor="middle">1.15 to 1.5</text></g>
<g><rect class="nj-heat-2" x="168" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="206" y="496" text-anchor="middle">1.5 to 2.5</text></g>
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<text class="nj-charts-cell nj-charts-cell--small" x="286" y="496" text-anchor="middle">2.5 to 5</text></g>
<g><rect class="nj-heat-4" x="328" y="482" width="76" height="20" rx="3"/>
<text class="nj-charts-cell nj-charts-cell--small" x="366" y="496" text-anchor="middle">5 and more</text></g>
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<text class="nj-charts-tick" x="440" y="496">n/a</text>
<text class="nj-charts-tick nj-charts-tick--l" x="468" y="496">no A&#8203;PI for it</text>
</svg>
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docs/mkdocs/docs/integration/compile_times.md
+91 -1
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@@ -11,6 +11,11 @@ that cost, ordered by how much they typically save.
16.2.0 on macOS (Apple M1 Max). All configurations were run interleaved, in alternating order. They show the order
of magnitude to expect; measure your own code before and after a change.
The two sections on `std::format` and ranges apply to C++20 only and were measured with `-std=c++20`, so their
baselines are slower than the others. Their differences are mostly within the run-to-run noise of a few percent:
two complete runs of the same configuration differed by up to 10% in the median. The tables show the later run (one
outlier cell was repeated).
The translation units are listed below. They replace the ones used for earlier versions of this page, whose
sources were not published, so the numbers differ from earlier versions.
@@ -66,7 +71,8 @@ that cost, ordered by how much they typically save.
--8<-- "images/compile_times.svg"
</div>
<p class="nj-charts-caption" markdown>Change in compile time at `-O0` against the default configuration of the same
translation unit, taken from the tables below (medians of nine runs, see above). * computed from the milliseconds in
translation unit, taken from the tables below (medians of nine runs, see above; the `std::format` and ranges rows are
measured with `-std=c++20`). * computed from the milliseconds in
[Options without effect on compile times](#options-without-effect-on-compile-times).</p>
## Include `json_fwd.hpp` in headers
@@ -214,6 +220,88 @@ from and to `std::string`; whether that fallback exists depends on the platform'
(`std::wstring` on Windows), so check code that converts paths. `JSON_NO_IO` additionally removes all stream
functions (see [Options without effect](#options-without-effect-on-compile-times)).
## Switch off `std::format` support
With C++20 and a standard library that provides `<format>`, the library includes it to provide a
[`std::formatter<basic_json>`](../api/basic_json/std_formatter.md) specialization (see
[`JSON_HAS_STD_FORMAT`](../api/macros/json_has_std_format.md)). If you do not format JSON values with `std::format`,
switch the detection off for the whole project:
```cmake
target_compile_definitions(my_target PRIVATE JSON_HAS_STD_FORMAT=0)
```
| Compiler | Translation unit | Default (`-O0` / `-O2`) | `std::format` off (`-O0` / `-O2`) | Change |
|-------------|------------------|------------------------:|----------------------------------:|-----------:|
| Apple clang | model | 1283 ms / 1544 ms | 1269 ms / 1539 ms | −1% / 0% |
| GCC 16 | model | 2026 ms / 2482 ms | 1944 ms / 2416 ms | −4% / −3% |
| Apple clang | parsing | 1350 ms / 2278 ms | 1347 ms / 2300 ms | 0% / +1% |
| GCC 16 | parsing | 2715 ms / 4351 ms | 2644 ms / 4287 ms | −3% / −1% |
<p class="nj-table-caption" markdown>Compile time with `JSON_HAS_STD_FORMAT=0` against the default configuration, both with `-std=c++20`, at `-O0` and `-O2`.</p>
The saving is small, and only GCC shows it: libstdc++'s `<format>` is an additional header that nothing else in the
translation unit includes, so the macro removes it (and the headers it pulls in). With libc++ (Apple clang), other
standard headers include `<format>` anyway, so the macro only removes the library's own formatter, and the difference is
within the noise.
The trade-off: the `std::formatter<basic_json>` specialization is removed, so `#!cpp std::format("{}", j)`,
and `#!cpp std::format_to` with a JSON value no longer compile (in a test with both compilers on
macOS, the error was that `std::formatter` must be specialized for the type). Use [`dump()`](../api/basic_json/dump.md),
or the stream operators, instead.
## Switch off ranges support
With C++20 and a standard library that provides `<ranges>`, the library includes it to declare the
[`items()`](../api/basic_json/items.md) proxy a *borrowed range*, and uses the `std::ranges` concepts and algorithms for
construction from range views and for iterator input (see [`JSON_HAS_RANGES`](../api/macros/json_has_ranges.md)). If you
do not need these, switch the detection off for the whole project:
```cmake
target_compile_definitions(my_target PRIVATE JSON_HAS_RANGES=0)
```
| Compiler | Translation unit | Default (`-O0` / `-O2`) | Ranges off (`-O0` / `-O2`) | Change |
|-------------|------------------|------------------------:|---------------------------:|-----------:|
| Apple clang | model | 1283 ms / 1544 ms | 1237 ms / 1495 ms | −4% / −3% |
| GCC 16 | model | 2026 ms / 2482 ms | 2004 ms / 2464 ms | −1% / −1% |
| Apple clang | parsing | 1350 ms / 2278 ms | 1311 ms / 2284 ms | −3% / 0% |
| GCC 16 | parsing | 2715 ms / 4351 ms | 2705 ms / 4427 ms | 0% / +2% |
<p class="nj-table-caption" markdown>Compile time with `JSON_HAS_RANGES=0` against the default configuration, both with `-std=c++20`, at `-O0` and `-O2`.</p>
The saving is small as well, and with GCC it is not distinguishable from the noise: its `<format>` includes `<span>`,
so with `std::format` support left on, part of the ranges machinery is still parsed.
Both macros together save more than either alone:
```cmake
target_compile_definitions(my_target PRIVATE JSON_HAS_STD_FORMAT=0 JSON_HAS_RANGES=0)
```
| Compiler | Translation unit | Default (`-O0` / `-O2`) | Both off (`-O0` / `-O2`) | Change |
|-------------|------------------|------------------------:|-------------------------:|-----------:|
| Apple clang | model | 1283 ms / 1544 ms | 1223 ms / 1504 ms | −5% / −3% |
| GCC 16 | model | 2026 ms / 2482 ms | 1914 ms / 2378 ms | −6% / −4% |
| Apple clang | parsing | 1350 ms / 2278 ms | 1311 ms / 2271 ms | −3% / 0% |
| GCC 16 | parsing | 2715 ms / 4351 ms | 2635 ms / 4260 ms | −3% / −2% |
<p class="nj-table-caption" markdown>Compile time with `JSON_HAS_STD_FORMAT=0` and `JSON_HAS_RANGES=0` against the default configuration, both with `-std=c++20`, at `-O0` and `-O2`.</p>
The trade-offs of `JSON_HAS_RANGES=0` are larger than those of the other options on this page:
- `items()` is no longer a borrowed range. On a temporary, `#!cpp std::ranges::begin(make_json().items())` no longer
compiles, and `std::ranges` algorithms such as `#!cpp std::ranges::find_if(make_json().items(), pred)` return
`std::ranges::dangling` instead of an iterator, so code that uses the result no longer compiles. Calling them on
`#!cpp j.items()` for a named `j` is not affected.
- [`JSON_HAS_RANGE_VIEW_CONVERSION`](../api/macros/json_has_range_view_conversion.md) becomes `0`, so a JSON array can no
longer be constructed from a `std::ranges::view` such as the result of `std::views::filter`. The assignment
`#!cpp json j = v | std::views::filter(pred);` no longer compiles.
- Parsing from an iterator pair loses the C++20 fast path for contiguous iterators that are not pointers (for
example those of `std::vector`) and falls back to byte-at-a-time scanning. The result is the same; parsing may be
slower (not measured here).
The first two were checked with both compilers on macOS; the third is read from the library's source.
## Use C++20 modules
With a toolchain that supports named modules, `import nlohmann.json;` compiles the library once into a module and
@@ -343,6 +431,8 @@ and −2% / 0% (GCC). To get a saving, combine it with
- [`JSON_HAS_FILESYSTEM`](../api/macros/json_has_filesystem.md) - control the conversions from and to
`std::filesystem::path`
- [`JSON_HAS_STD_FORMAT`](../api/macros/json_has_std_format.md) - control the `std::formatter` specialization
- [`JSON_HAS_RANGES`](../api/macros/json_has_ranges.md) - control the use of `std::ranges`
- [`JSON_NO_AUTOMATIC_UDLS`](../api/macros/json_no_automatic_udls.md) - do not include the user-defined string
literals automatically
- [Modules](../features/modules.md) - C++20 module support
docs/mkdocs/docs/js/external-links.js
+3 -2
View File
@@ -1,7 +1,8 @@
/*
* Marks links that leave the site with the class "nj-external", which brand.css turns into a small icon in front of
* the link. A link is external when its host is neither the current one nor the production site. Links in the page
* actions (edit, raw), buttons, header anchors, and links that only wrap an image (badges) are left alone.
* actions (edit, raw), buttons, header anchors, a blog post's byline, and links that only wrap an image (badges) are
* left alone.
* Runs through Material's document$ (navigation.instant), so it also applies after an instant page switch.
*/
(function () {
@@ -17,7 +18,7 @@
if (a.protocol !== "http:" && a.protocol !== "https:") {
continue;
}
if (a.matches(".md-button, .md-content__button, .headerlink") || a.querySelector("img, svg")) {
if (a.matches(".md-button, .md-content__button, .headerlink, .nj-byline a") || a.querySelector("img, svg")) {
continue;
}
a.classList.add("nj-external");
docs/mkdocs/docs/js/fig-charts.js
+69
View File
@@ -104,3 +104,72 @@
init();
}
})();
/* figures: the tooltips of the heatmaps in home/blog/how_3_13_0_got_faster.md (perf_blog_usecases_*.svg). Each
cell is a focusable <g data-tip>: its lines (the first one the heading) are shown on hover, keyboard focus or tap.
Without JS, the figure's <desc> and the tables in the appendix carry the same numbers. */
(function () {
"use strict";
var tip = null;
var current = null;
function show(cell) {
if (!tip) {
tip = document.createElement("div");
tip.className = "nj-heat-tip";
tip.setAttribute("role", "tooltip");
tip.hidden = true;
document.body.appendChild(tip);
}
if (current) current.classList.remove("nj-heat-on");
current = cell;
cell.classList.add("nj-heat-on");
var lines = (cell.getAttribute("data-tip") || "").split("\n");
tip.textContent = "";
lines.forEach(function (line, i) {
var el = document.createElement(i === 0 ? "strong" : "div");
el.textContent = line;
tip.appendChild(el);
});
tip.hidden = false;
var r = cell.getBoundingClientRect();
var w = tip.offsetWidth, h = tip.offsetHeight;
var x = Math.min(Math.max(8, r.left + r.width / 2 - w / 2), document.documentElement.clientWidth - w - 8);
var y = r.bottom + 8 + h > window.innerHeight ? r.top - h - 8 : r.bottom + 8;
tip.style.left = (x + window.scrollX) + "px";
tip.style.top = (y + window.scrollY) + "px";
}
function hide() {
if (current) current.classList.remove("nj-heat-on");
current = null;
if (tip) tip.hidden = true;
}
function init() {
hide();
Array.prototype.forEach.call(document.querySelectorAll("svg.nj-charts--heat .nj-heat-cell"), function (cell) {
if (cell.dataset.njHeatReady) return;
cell.dataset.njHeatReady = "1";
cell.addEventListener("mouseenter", function () { show(cell); });
cell.addEventListener("mouseleave", hide);
cell.addEventListener("focus", function () { show(cell); });
cell.addEventListener("blur", hide);
// a tap also focuses the cell; a tap elsewhere or Escape hides the tooltip
cell.addEventListener("click", function (ev) { ev.stopPropagation(); show(cell); });
});
}
document.addEventListener("click", hide);
document.addEventListener("keydown", function (ev) { if (ev.key === "Escape") hide(); });
window.addEventListener("scroll", hide, { passive: true });
if (typeof document$ !== "undefined" && document$ && typeof document$.subscribe === "function") {
document$.subscribe(init);
} else if (document.readyState === "loading") {
document.addEventListener("DOMContentLoaded", init);
} else {
init();
}
})();
docs/mkdocs/includes/glossary.md
+6
View File
@@ -8,6 +8,7 @@
*[BDFL]: Benevolent Dictator for Life
*[BJData]: Binary JData
*[BON8]: Binary Object Notation 8
*[BSL]: Boost Software License
*[BSON]: Binary JSON
*[CBOR]: Concise Binary Object Representation
*[CC0]: Creative Commons Zero
@@ -16,6 +17,7 @@
*[CUDA]: Compute Unified Device Architecture
*[CVE]: Common Vulnerabilities and Exposures
*[DOM]: Document Object Model
*[EDG]: Edison Design Group, maker of a C++ compiler front end
*[EOF]: End of File
*[FAQ]: Frequently Asked Questions
*[GCC]: GNU Compiler Collection
@@ -31,9 +33,11 @@
*[JSONC]: JSON with Comments
*[JWCC]: JSON With Commas and Comments
*[LLDB]: LLVM Debugger
*[LTO]: Link-Time Optimization
*[LTS]: Long-Term Support
*[MinGW]: Minimalist GNU for Windows
*[MIT]: Massachusetts Institute of Technology
*[MPL]: Mozilla Public License
*[MsgPack]: MessagePack
*[MSVC]: Microsoft Visual C++
*[NaN]: Not a Number
@@ -42,6 +46,7 @@
*[NEON]: Arm SIMD instruction set extension
*[NUL]: Null character (U+0000, byte value 0)
*[ODR]: One Definition Rule
*[PCH]: Precompiled Header
*[REUSE]: Software licensing specification by the Free Software Foundation Europe
*[RFC]: Request for Comments
*[RTTI]: Runtime Type Information
@@ -60,3 +65,4 @@
*[UDLs]: User-defined literals
*[URL]: Uniform Resource Locator
*[UTF]: Unicode Transformation Format
*[XOR]: Exclusive or
docs/mkdocs/mkdocs.yml
+4
View File
@@ -104,6 +104,8 @@ nav:
- 'v2.0.0': home/releases/v2.0.0.md
- 'v1.1.0': home/releases/v1.1.0.md
- 'v1.0.0': home/releases/v1.0.0.md
- Blog:
- 'How 3.13.0 got faster': home/blog/how_3_13_0_got_faster.md
- home/design_goals.md
- home/architecture.md
- home/customers.md
@@ -130,6 +132,7 @@ nav:
- features/element_access/unchecked_access.md
- features/element_access/checked_access.md
- features/element_access/default_value.md
- features/files.md
- features/iterators.md
- features/merge_patch.md
- features/json_patch.md
@@ -609,6 +612,7 @@ plugins:
Home:
- index.md
- home/*.md
- home/blog/*.md
Features:
- features/*.md
- features/binary_formats/*.md
docs/mkdocs/scripts/figures/charts.py
+2
View File
@@ -73,6 +73,8 @@ COMPILE = [
("JSON_NO_AUTOMATIC_UDLS", "parsing TU", -1, -2, False),
("JSON_HAS_FILESYSTEM=0 + JSON_NO_IO", "model TU", -8, -11, False),
("JSON_HAS_FILESYSTEM=0", "model TU", -5, -9, False),
("JSON_HAS_STD_FORMAT=0", "model TU", -1, -4, False),
("JSON_HAS_RANGES=0", "model TU", -4, -1, False),
# computed from the ms in "Options without effect on compile times": 1034/1051, 1756/1801, 1055/1051, 1783/1801
("JSON_NO_IO", "model TU", round((1034 / 1051 - 1) * 100), round((1756 / 1801 - 1) * 100), True),
("JSON_USE_GLOBAL_UDLS=0", "model TU", round((1055 / 1051 - 1) * 100), round((1783 / 1801 - 1) * 100), True),
docs/mkdocs/scripts/figures/data/perf_heldout_validate.json
+3202
View File
File diff suppressed because it is too large. Load diff
docs/mkdocs/scripts/figures/data/perf_suite.csv
+183
View File
@@ -0,0 +1,183 @@
benchmark,unit,3.12.0,3.13.0,speedup
Accept/canada,ns,1.27789e+07,1.34304e+06,9.515
Accept/citm_catalog,ns,6.47666e+06,474064,13.662
Accept/floats,ns,1.14227e+08,1.72173e+07,6.634
Accept/jeopardy,ns,2.18081e+08,2.79002e+07,7.816
Accept/signed_ints,ns,1.15981e+08,2.33778e+07,4.961
Accept/small_signed_ints,ns,5.64996e+07,1.31818e+07,4.286
Accept/twitter,ns,2.48725e+06,234277,10.617
Accept/unsigned_ints,ns,1.14729e+08,2.28147e+07,5.029
BinaryToCbor/1024,ns,315.368,108.041,2.919
BinaryToCbor/128,ns,266.074,114.105,2.332
BinaryToCbor/16,ns,246.212,49.912,4.933
BinaryToCbor/16384,ns,950.054,418.045,2.273
BinaryToCbor/2048,ns,340.213,126.796,2.683
BinaryToCbor/256,ns,279.79,91.7512,3.049
BinaryToCbor/32,ns,262.471,50.3433,5.214
BinaryToCbor/32768,ns,1578.4,837.8,1.884
BinaryToCbor/4096,ns,431.963,174.276,2.479
BinaryToCbor/512,ns,296.768,102.073,2.907
BinaryToCbor/64,ns,259.159,84.2641,3.076
BinaryToCbor/8,ns,250.574,49.9122,5.020
BinaryToCbor/8192,ns,527.418,253.616,2.080
Copy/canada,ns,3.68841e+06,2.9017e+06,1.271
Copy/citm_catalog,ns,1.64706e+06,1.48507e+06,1.109
Copy/twitter,ns,810558,728698,1.112
CopyAssign/canada,ns,3.73912e+06,2.94393e+06,1.270
CopyAssign/citm_catalog,ns,1.6545e+06,1.53713e+06,1.076
CopyAssign/twitter,ns,817997,752415,1.087
CopyOnly/canada,ns,1.53602e+06,1.52075e+06,1.010
CopyOnly/citm_catalog,ns,754817,794741,0.950
CopyOnly/twitter,ns,406966,410330,0.992
CopyRing/canada,ns,3.74734e+06,2.92592e+06,1.281
CopyRing/citm_catalog,ns,1.7477e+06,1.54757e+06,1.129
CopyRing/twitter,ns,876191,784261,1.117
DestroyOnly/canada,ns,2.16216e+06,1.38217e+06,1.564
DestroyOnly/citm_catalog,ns,895535,681877,1.313
DestroyOnly/twitter,ns,406450,326620,1.244
Diff/canada,ns,3.91782e+07,3.75209e+06,10.442
Diff/citm_catalog,ns,6.91552e+06,1.09211e+06,6.332
Diff/twitter,ns,4.92965e+06,639734,7.706
Dump/canada / -,ns,6.70617e+06,2.31399e+06,2.898
Dump/canada / 4,ns,8.81664e+06,3.03083e+06,2.909
Dump/citm_catalog / -,ns,1.39132e+06,295525,4.708
Dump/citm_catalog / 4,ns,1.94729e+06,421536,4.620
Dump/floats / -,ns,6.35321e+07,2.37757e+07,2.672
Dump/floats / 4,ns,7.19879e+07,2.4663e+07,2.919
Dump/jeopardy / -,ns,2.0176e+08,3.0624e+07,6.588
Dump/jeopardy / 4,ns,2.20493e+08,3.43504e+07,6.419
Dump/signed_ints / -,ns,2.36853e+07,1.07405e+07,2.205
Dump/signed_ints / 4,ns,3.2029e+07,1.13731e+07,2.816
Dump/small_signed_ints / -,ns,1.78623e+07,7.93339e+06,2.252
Dump/small_signed_ints / 4,ns,2.50508e+07,8.80939e+06,2.844
Dump/twitter / -,ns,1.40813e+06,213513,6.595
Dump/twitter / 4,ns,1.59095e+06,249353,6.380
Dump/unsigned_ints / -,ns,2.35653e+07,8.07378e+06,2.919
Dump/unsigned_ints / 4,ns,3.17269e+07,8.50708e+06,3.729
Equal/canada,ns,463162,336269,1.377
Equal/citm_catalog,ns,264124,260967,1.012
Equal/twitter,ns,138843,128906,1.077
Flatten/canada,ns,2.86941e+07,1.1214e+07,2.559
Flatten/citm_catalog,ns,6.4406e+06,3.00538e+06,2.143
Flatten/twitter,ns,3.53051e+06,2.05449e+06,1.718
FlattenOrdered/citm_catalog,ns,2.56371e+08,1.40896e+06,181.958
FlattenOrdered/twitter,ns,5.00313e+07,863594,57.934
FromBinaryBuffer/bjdata / canada,ns,8.15141e+06,4.17154e+06,1.954
FromBinaryBuffer/bjdata / twitter,ns,3.18297e+06,893076,3.564
FromBinaryBuffer/bjdata_optimized / canada,ns,8.73882e+06,2.42167e+06,3.609
FromBinaryBuffer/bjdata_optimized / twitter,ns,3.15905e+06,884856,3.570
FromBinaryBuffer/bson / canada,ns,9.33283e+06,4.27358e+06,2.184
FromBinaryBuffer/bson / citm_catalog,ns,3.91854e+06,1.61073e+06,2.433
FromBinaryBuffer/bson / twitter,ns,3.176e+06,910290,3.489
FromBinaryBuffer/cbor / canada,ns,8.39002e+06,2.08256e+06,4.029
FromBinaryBuffer/cbor / citm_catalog,ns,3.71495e+06,1.31999e+06,2.814
FromBinaryBuffer/cbor / floats,ns,2.91606e+07,5.48446e+06,5.317
FromBinaryBuffer/cbor / jeopardy,ns,3.52964e+08,1.00739e+08,3.504
FromBinaryBuffer/cbor / signed_ints,ns,3.59874e+07,9.77712e+06,3.681
FromBinaryBuffer/cbor / twitter,ns,3.08997e+06,878827,3.516
FromBinaryBuffer/msgpack / canada,ns,8.25869e+06,2.09779e+06,3.937
FromBinaryBuffer/msgpack / citm_catalog,ns,3.71825e+06,1.28675e+06,2.890
FromBinaryBuffer/msgpack / jeopardy,ns,3.56624e+08,9.69017e+07,3.680
FromBinaryBuffer/msgpack / twitter,ns,3.06392e+06,850067,3.604
FromBinaryBuffer/ubjson / canada,ns,8.12649e+06,4.14411e+06,1.961
FromBinaryBuffer/ubjson / citm_catalog,ns,3.82184e+06,1.65659e+06,2.307
FromBinaryBuffer/ubjson / jeopardy,ns,3.65507e+08,1.01303e+08,3.608
FromBinaryBuffer/ubjson / twitter,ns,3.15221e+06,895746,3.519
FromBinaryBuffer/ubjson_optimized / canada,ns,8.5126e+06,2.38858e+06,3.564
FromBinaryBuffer/ubjson_optimized / twitter,ns,3.12199e+06,882166,3.539
FromBinaryFile/bjdata / twitter,ns,1.04222e+07,1.45214e+06,7.177
FromBinaryFile/bson / twitter,ns,1.02874e+07,1.23514e+06,8.329
FromBinaryFile/cbor / canada,ns,1.43434e+07,2.4071e+06,5.959
FromBinaryFile/cbor / twitter,ns,9.92359e+06,1.075e+06,9.231
FromBinaryFile/ubjson / canada,ns,1.35516e+07,6.2336e+06,2.174
FromBinaryFile/ubjson / twitter,ns,1.05159e+07,1.46077e+06,7.199
FromBinaryShape/containers / bjdata,ns,1.43175e+07,7.24204e+06,1.977
FromBinaryShape/containers / bson,ns,1.74215e+07,7.97531e+06,2.184
FromBinaryShape/containers / cbor,ns,1.3898e+07,3.93021e+06,3.536
FromBinaryShape/containers / msgpack,ns,1.378e+07,3.88449e+06,3.547
FromBinaryShape/containers / ubjson,ns,1.44223e+07,7.2737e+06,1.983
FromBinaryShape/containers / ubjson_optimized,ns,1.49736e+07,4.48674e+06,3.337
FromBinaryShape/nested / bjdata,ns,96363.9,38197.9,2.523
FromBinaryShape/nested / bson,ns,102515,42496.1,2.412
FromBinaryShape/nested / cbor,ns,93842.1,35385.5,2.652
FromBinaryShape/nested / msgpack,ns,92033,34888.5,2.638
FromBinaryShape/nested / ubjson,ns,96455.9,37922.6,2.543
FromBinaryShape/scalars / bjdata,ns,2.48048e+07,1.1476e+07,2.161
FromBinaryShape/scalars / cbor,ns,2.56641e+07,5.68711e+06,4.513
FromBinaryShape/scalars / msgpack,ns,2.44254e+07,5.56716e+06,4.387
FromBinaryShape/scalars / ubjson,ns,2.49328e+07,1.15997e+07,2.149
FromCborChunkedString/10000 chunks,ns,90902.3,61512.6,1.478
FromMsgpack/canada,ns,1.43596e+07,2.40425e+06,5.973
FromMsgpack/citm_catalog,ns,9.03526e+06,1.66705e+06,5.420
FromMsgpack/floats,ns,5.97879e+07,2.82314e+07,2.118
FromMsgpack/jeopardy,ns,1.14023e+09,1.1207e+08,10.174
FromMsgpack/signed_ints,ns,6.30943e+07,3.27435e+07,1.927
FromMsgpack/small_signed_ints,ns,6.34225e+07,3.52538e+07,1.799
FromMsgpack/twitter,ns,9.99383e+06,1.01241e+06,9.871
FromMsgpack/unsigned_ints,ns,5.61151e+07,2.82024e+07,1.990
"GetArray<std::array<int, 1000>>",ns,2242.43,641.094,3.498
GetArray<std::deque<int>>,ns,8157.44,1172.81,6.955
GetArray<std::set<int>>,ns,58833.4,41553,1.416
GetArray<std::vector<int>>,ns,6725.67,670.816,10.026
GetMap/citm_catalog,ns,3.44193e+06,2.43771e+06,1.412
GetVectorDouble/floats,ns,6.7017e+06,650766,10.298
GetVectorInt/signed_ints,ns,8.06579e+06,3.40643e+06,2.368
Iterate/canada,ns,873618,445143,1.963
Iterate/citm_catalog,ns,301801,157823,1.912
Iterate/twitter,ns,87345,58936.4,1.482
JsonPointerAt/citm_catalog,ns,1.85369e+06,1.1599e+06,1.598
JsonPointerAt/twitter,ns,791487,599585,1.320
JsonPointerContains/citm_catalog,ns,2.73824e+06,1.25465e+06,2.182
JsonPointerContains/twitter,ns,1.32403e+06,620312,2.134
JsonPointerParse/citm_catalog,ns,5.72778e+06,2.21453e+06,2.586
JsonPointerParse/twitter,ns,2.4672e+06,1.00864e+06,2.446
JsonPointerToString/citm_catalog,ns,6.65484e+06,1.89788e+06,3.506
JsonPointerToString/twitter,ns,2.13903e+06,811916,2.635
ParseFILE/canada,ns,5.29148e+07,6.01689e+06,8.794
ParseFILE/citm_catalog,ns,3.49593e+07,2.34075e+06,14.935
ParseFILE/twitter,ns,1.38263e+07,1.34963e+06,10.245
ParseFile/canada,ns,1.76922e+07,6.22534e+06,2.842
ParseFile/citm_catalog,ns,7.85962e+06,2.47244e+06,3.179
ParseFile/floats,ns,1.29413e+08,4.83839e+07,2.675
ParseFile/jeopardy,ns,3.30328e+08,1.56161e+08,2.115
ParseFile/signed_ints,ns,1.27675e+08,4.65862e+07,2.741
ParseFile/small_signed_ints,ns,6.44651e+07,3.33577e+07,1.933
ParseFile/twitter,ns,3.39729e+06,1.37932e+06,2.463
ParseFile/unsigned_ints,ns,1.23326e+08,4.73146e+07,2.607
ParseIndented/canada / 4,ns,3.41603e+07,4.60976e+06,7.410
ParseIndented/citm_catalog / 4,ns,7.45491e+06,1.45798e+06,5.113
ParseIndented/jeopardy / 4,ns,3.38801e+08,1.14349e+08,2.963
ParseIndented/twitter / 4,ns,3.61322e+06,975391,3.704
ParseStreamValues/ndjson,ns,7.07974e+06,3.7154e+06,1.906
ParseStreamValues/numbers,ns,1.92884e+06,388042,4.971
ParseString/canada,ns,1.52389e+07,3.73427e+06,4.081
ParseString/citm_catalog,ns,7.40128e+06,1.44821e+06,5.111
ParseString/floats,ns,1.19856e+08,2.49654e+07,4.801
ParseString/jeopardy,ns,3.03449e+08,1.13053e+08,2.684
ParseString/signed_ints,ns,1.21175e+08,2.86805e+07,4.225
ParseString/small_signed_ints,ns,6.07636e+07,1.77037e+07,3.432
ParseString/twitter,ns,3.21074e+06,920551,3.488
ParseString/unsigned_ints,ns,1.20011e+08,2.85056e+07,4.210
ParseStringOrdered/canada,ns,1.52544e+07,3.77964e+06,4.036
ParseStringOrdered/citm_catalog,ns,1.09927e+07,1.34339e+06,8.183
ParseStringOrdered/jeopardy,ns,3.60435e+08,9.81296e+07,3.673
ParseStringOrdered/twitter,ns,4.41151e+06,803859,5.488
Patch/canada,ns,1.01249e+07,3.41425e+06,2.965
Patch/citm_catalog,ns,2.54415e+06,1.65413e+06,1.538
Patch/twitter,ns,1.4932e+06,870217,1.716
SaxParse/canada,ns,1.28611e+07,2.49889e+06,5.147
SaxParse/citm_catalog,ns,6.43798e+06,655372,9.823
SaxParse/twitter,ns,2.48859e+06,334038,7.450
ToCbor/canada,ns,1.39101e+06,554952,2.507
ToCbor/citm_catalog,ns,1.0334e+06,260397,3.969
ToCbor/floats,ns,8.93763e+06,1.84589e+06,4.842
ToCbor/jeopardy,ns,7.14785e+07,2.10551e+07,3.395
ToCbor/signed_ints,ns,1.13863e+07,2.74211e+06,4.152
ToCbor/small_signed_ints,ns,1.02822e+07,2.37622e+06,4.327
ToCbor/twitter,ns,636979,144369,4.412
ToCbor/unsigned_ints,ns,8.04576e+06,2.74066e+06,2.936
ToJsonStrings/copy,ns,5.85988e+06,5.60056e+06,1.046
ToJsonStrings/move,ns,5.92335e+06,3.04643e+06,1.944
Unflatten/canada,ns,4.17811e+07,1.08132e+07,3.864
Unflatten/citm_catalog,ns,9.80315e+06,3.53672e+06,2.772
Unflatten/twitter,ns,4.56968e+06,2.16566e+06,2.110
1 benchmark unit 3.12.0 3.13.0 speedup
2 Accept/canada ns 1.27789e+07 1.34304e+06 9.515
3 Accept/citm_catalog ns 6.47666e+06 474064 13.662
4 Accept/floats ns 1.14227e+08 1.72173e+07 6.634
5 Accept/jeopardy ns 2.18081e+08 2.79002e+07 7.816
6 Accept/signed_ints ns 1.15981e+08 2.33778e+07 4.961
7 Accept/small_signed_ints ns 5.64996e+07 1.31818e+07 4.286
8 Accept/twitter ns 2.48725e+06 234277 10.617
9 Accept/unsigned_ints ns 1.14729e+08 2.28147e+07 5.029
10 BinaryToCbor/1024 ns 315.368 108.041 2.919
11 BinaryToCbor/128 ns 266.074 114.105 2.332
12 BinaryToCbor/16 ns 246.212 49.912 4.933
13 BinaryToCbor/16384 ns 950.054 418.045 2.273
14 BinaryToCbor/2048 ns 340.213 126.796 2.683
15 BinaryToCbor/256 ns 279.79 91.7512 3.049
16 BinaryToCbor/32 ns 262.471 50.3433 5.214
17 BinaryToCbor/32768 ns 1578.4 837.8 1.884
18 BinaryToCbor/4096 ns 431.963 174.276 2.479
19 BinaryToCbor/512 ns 296.768 102.073 2.907
20 BinaryToCbor/64 ns 259.159 84.2641 3.076
21 BinaryToCbor/8 ns 250.574 49.9122 5.020
22 BinaryToCbor/8192 ns 527.418 253.616 2.080
23 Copy/canada ns 3.68841e+06 2.9017e+06 1.271
24 Copy/citm_catalog ns 1.64706e+06 1.48507e+06 1.109
25 Copy/twitter ns 810558 728698 1.112
26 CopyAssign/canada ns 3.73912e+06 2.94393e+06 1.270
27 CopyAssign/citm_catalog ns 1.6545e+06 1.53713e+06 1.076
28 CopyAssign/twitter ns 817997 752415 1.087
29 CopyOnly/canada ns 1.53602e+06 1.52075e+06 1.010
30 CopyOnly/citm_catalog ns 754817 794741 0.950
31 CopyOnly/twitter ns 406966 410330 0.992
32 CopyRing/canada ns 3.74734e+06 2.92592e+06 1.281
33 CopyRing/citm_catalog ns 1.7477e+06 1.54757e+06 1.129
34 CopyRing/twitter ns 876191 784261 1.117
35 DestroyOnly/canada ns 2.16216e+06 1.38217e+06 1.564
36 DestroyOnly/citm_catalog ns 895535 681877 1.313
37 DestroyOnly/twitter ns 406450 326620 1.244
38 Diff/canada ns 3.91782e+07 3.75209e+06 10.442
39 Diff/citm_catalog ns 6.91552e+06 1.09211e+06 6.332
40 Diff/twitter ns 4.92965e+06 639734 7.706
41 Dump/canada / - ns 6.70617e+06 2.31399e+06 2.898
42 Dump/canada / 4 ns 8.81664e+06 3.03083e+06 2.909
43 Dump/citm_catalog / - ns 1.39132e+06 295525 4.708
44 Dump/citm_catalog / 4 ns 1.94729e+06 421536 4.620
45 Dump/floats / - ns 6.35321e+07 2.37757e+07 2.672
46 Dump/floats / 4 ns 7.19879e+07 2.4663e+07 2.919
47 Dump/jeopardy / - ns 2.0176e+08 3.0624e+07 6.588
48 Dump/jeopardy / 4 ns 2.20493e+08 3.43504e+07 6.419
49 Dump/signed_ints / - ns 2.36853e+07 1.07405e+07 2.205
50 Dump/signed_ints / 4 ns 3.2029e+07 1.13731e+07 2.816
51 Dump/small_signed_ints / - ns 1.78623e+07 7.93339e+06 2.252
52 Dump/small_signed_ints / 4 ns 2.50508e+07 8.80939e+06 2.844
53 Dump/twitter / - ns 1.40813e+06 213513 6.595
54 Dump/twitter / 4 ns 1.59095e+06 249353 6.380
55 Dump/unsigned_ints / - ns 2.35653e+07 8.07378e+06 2.919
56 Dump/unsigned_ints / 4 ns 3.17269e+07 8.50708e+06 3.729
57 Equal/canada ns 463162 336269 1.377
58 Equal/citm_catalog ns 264124 260967 1.012
59 Equal/twitter ns 138843 128906 1.077
60 Flatten/canada ns 2.86941e+07 1.1214e+07 2.559
61 Flatten/citm_catalog ns 6.4406e+06 3.00538e+06 2.143
62 Flatten/twitter ns 3.53051e+06 2.05449e+06 1.718
63 FlattenOrdered/citm_catalog ns 2.56371e+08 1.40896e+06 181.958
64 FlattenOrdered/twitter ns 5.00313e+07 863594 57.934
65 FromBinaryBuffer/bjdata / canada ns 8.15141e+06 4.17154e+06 1.954
66 FromBinaryBuffer/bjdata / twitter ns 3.18297e+06 893076 3.564
67 FromBinaryBuffer/bjdata_optimized / canada ns 8.73882e+06 2.42167e+06 3.609
68 FromBinaryBuffer/bjdata_optimized / twitter ns 3.15905e+06 884856 3.570
69 FromBinaryBuffer/bson / canada ns 9.33283e+06 4.27358e+06 2.184
70 FromBinaryBuffer/bson / citm_catalog ns 3.91854e+06 1.61073e+06 2.433
71 FromBinaryBuffer/bson / twitter ns 3.176e+06 910290 3.489
72 FromBinaryBuffer/cbor / canada ns 8.39002e+06 2.08256e+06 4.029
73 FromBinaryBuffer/cbor / citm_catalog ns 3.71495e+06 1.31999e+06 2.814
74 FromBinaryBuffer/cbor / floats ns 2.91606e+07 5.48446e+06 5.317
75 FromBinaryBuffer/cbor / jeopardy ns 3.52964e+08 1.00739e+08 3.504
76 FromBinaryBuffer/cbor / signed_ints ns 3.59874e+07 9.77712e+06 3.681
77 FromBinaryBuffer/cbor / twitter ns 3.08997e+06 878827 3.516
78 FromBinaryBuffer/msgpack / canada ns 8.25869e+06 2.09779e+06 3.937
79 FromBinaryBuffer/msgpack / citm_catalog ns 3.71825e+06 1.28675e+06 2.890
80 FromBinaryBuffer/msgpack / jeopardy ns 3.56624e+08 9.69017e+07 3.680
81 FromBinaryBuffer/msgpack / twitter ns 3.06392e+06 850067 3.604
82 FromBinaryBuffer/ubjson / canada ns 8.12649e+06 4.14411e+06 1.961
83 FromBinaryBuffer/ubjson / citm_catalog ns 3.82184e+06 1.65659e+06 2.307
84 FromBinaryBuffer/ubjson / jeopardy ns 3.65507e+08 1.01303e+08 3.608
85 FromBinaryBuffer/ubjson / twitter ns 3.15221e+06 895746 3.519
86 FromBinaryBuffer/ubjson_optimized / canada ns 8.5126e+06 2.38858e+06 3.564
87 FromBinaryBuffer/ubjson_optimized / twitter ns 3.12199e+06 882166 3.539
88 FromBinaryFile/bjdata / twitter ns 1.04222e+07 1.45214e+06 7.177
89 FromBinaryFile/bson / twitter ns 1.02874e+07 1.23514e+06 8.329
90 FromBinaryFile/cbor / canada ns 1.43434e+07 2.4071e+06 5.959
91 FromBinaryFile/cbor / twitter ns 9.92359e+06 1.075e+06 9.231
92 FromBinaryFile/ubjson / canada ns 1.35516e+07 6.2336e+06 2.174
93 FromBinaryFile/ubjson / twitter ns 1.05159e+07 1.46077e+06 7.199
94 FromBinaryShape/containers / bjdata ns 1.43175e+07 7.24204e+06 1.977
95 FromBinaryShape/containers / bson ns 1.74215e+07 7.97531e+06 2.184
96 FromBinaryShape/containers / cbor ns 1.3898e+07 3.93021e+06 3.536
97 FromBinaryShape/containers / msgpack ns 1.378e+07 3.88449e+06 3.547
98 FromBinaryShape/containers / ubjson ns 1.44223e+07 7.2737e+06 1.983
99 FromBinaryShape/containers / ubjson_optimized ns 1.49736e+07 4.48674e+06 3.337
100 FromBinaryShape/nested / bjdata ns 96363.9 38197.9 2.523
101 FromBinaryShape/nested / bson ns 102515 42496.1 2.412
102 FromBinaryShape/nested / cbor ns 93842.1 35385.5 2.652
103 FromBinaryShape/nested / msgpack ns 92033 34888.5 2.638
104 FromBinaryShape/nested / ubjson ns 96455.9 37922.6 2.543
105 FromBinaryShape/scalars / bjdata ns 2.48048e+07 1.1476e+07 2.161
106 FromBinaryShape/scalars / cbor ns 2.56641e+07 5.68711e+06 4.513
107 FromBinaryShape/scalars / msgpack ns 2.44254e+07 5.56716e+06 4.387
108 FromBinaryShape/scalars / ubjson ns 2.49328e+07 1.15997e+07 2.149
109 FromCborChunkedString/10000 chunks ns 90902.3 61512.6 1.478
110 FromMsgpack/canada ns 1.43596e+07 2.40425e+06 5.973
111 FromMsgpack/citm_catalog ns 9.03526e+06 1.66705e+06 5.420
112 FromMsgpack/floats ns 5.97879e+07 2.82314e+07 2.118
113 FromMsgpack/jeopardy ns 1.14023e+09 1.1207e+08 10.174
114 FromMsgpack/signed_ints ns 6.30943e+07 3.27435e+07 1.927
115 FromMsgpack/small_signed_ints ns 6.34225e+07 3.52538e+07 1.799
116 FromMsgpack/twitter ns 9.99383e+06 1.01241e+06 9.871
117 FromMsgpack/unsigned_ints ns 5.61151e+07 2.82024e+07 1.990
118 GetArray<std::array<int, 1000>> ns 2242.43 641.094 3.498
119 GetArray<std::deque<int>> ns 8157.44 1172.81 6.955
120 GetArray<std::set<int>> ns 58833.4 41553 1.416
121 GetArray<std::vector<int>> ns 6725.67 670.816 10.026
122 GetMap/citm_catalog ns 3.44193e+06 2.43771e+06 1.412
123 GetVectorDouble/floats ns 6.7017e+06 650766 10.298
124 GetVectorInt/signed_ints ns 8.06579e+06 3.40643e+06 2.368
125 Iterate/canada ns 873618 445143 1.963
126 Iterate/citm_catalog ns 301801 157823 1.912
127 Iterate/twitter ns 87345 58936.4 1.482
128 JsonPointerAt/citm_catalog ns 1.85369e+06 1.1599e+06 1.598
129 JsonPointerAt/twitter ns 791487 599585 1.320
130 JsonPointerContains/citm_catalog ns 2.73824e+06 1.25465e+06 2.182
131 JsonPointerContains/twitter ns 1.32403e+06 620312 2.134
132 JsonPointerParse/citm_catalog ns 5.72778e+06 2.21453e+06 2.586
133 JsonPointerParse/twitter ns 2.4672e+06 1.00864e+06 2.446
134 JsonPointerToString/citm_catalog ns 6.65484e+06 1.89788e+06 3.506
135 JsonPointerToString/twitter ns 2.13903e+06 811916 2.635
136 ParseFILE/canada ns 5.29148e+07 6.01689e+06 8.794
137 ParseFILE/citm_catalog ns 3.49593e+07 2.34075e+06 14.935
138 ParseFILE/twitter ns 1.38263e+07 1.34963e+06 10.245
139 ParseFile/canada ns 1.76922e+07 6.22534e+06 2.842
140 ParseFile/citm_catalog ns 7.85962e+06 2.47244e+06 3.179
141 ParseFile/floats ns 1.29413e+08 4.83839e+07 2.675
142 ParseFile/jeopardy ns 3.30328e+08 1.56161e+08 2.115
143 ParseFile/signed_ints ns 1.27675e+08 4.65862e+07 2.741
144 ParseFile/small_signed_ints ns 6.44651e+07 3.33577e+07 1.933
145 ParseFile/twitter ns 3.39729e+06 1.37932e+06 2.463
146 ParseFile/unsigned_ints ns 1.23326e+08 4.73146e+07 2.607
147 ParseIndented/canada / 4 ns 3.41603e+07 4.60976e+06 7.410
148 ParseIndented/citm_catalog / 4 ns 7.45491e+06 1.45798e+06 5.113
149 ParseIndented/jeopardy / 4 ns 3.38801e+08 1.14349e+08 2.963
150 ParseIndented/twitter / 4 ns 3.61322e+06 975391 3.704
151 ParseStreamValues/ndjson ns 7.07974e+06 3.7154e+06 1.906
152 ParseStreamValues/numbers ns 1.92884e+06 388042 4.971
153 ParseString/canada ns 1.52389e+07 3.73427e+06 4.081
154 ParseString/citm_catalog ns 7.40128e+06 1.44821e+06 5.111
155 ParseString/floats ns 1.19856e+08 2.49654e+07 4.801
156 ParseString/jeopardy ns 3.03449e+08 1.13053e+08 2.684
157 ParseString/signed_ints ns 1.21175e+08 2.86805e+07 4.225
158 ParseString/small_signed_ints ns 6.07636e+07 1.77037e+07 3.432
159 ParseString/twitter ns 3.21074e+06 920551 3.488
160 ParseString/unsigned_ints ns 1.20011e+08 2.85056e+07 4.210
161 ParseStringOrdered/canada ns 1.52544e+07 3.77964e+06 4.036
162 ParseStringOrdered/citm_catalog ns 1.09927e+07 1.34339e+06 8.183
163 ParseStringOrdered/jeopardy ns 3.60435e+08 9.81296e+07 3.673
164 ParseStringOrdered/twitter ns 4.41151e+06 803859 5.488
165 Patch/canada ns 1.01249e+07 3.41425e+06 2.965
166 Patch/citm_catalog ns 2.54415e+06 1.65413e+06 1.538
167 Patch/twitter ns 1.4932e+06 870217 1.716
168 SaxParse/canada ns 1.28611e+07 2.49889e+06 5.147
169 SaxParse/citm_catalog ns 6.43798e+06 655372 9.823
170 SaxParse/twitter ns 2.48859e+06 334038 7.450
171 ToCbor/canada ns 1.39101e+06 554952 2.507
172 ToCbor/citm_catalog ns 1.0334e+06 260397 3.969
173 ToCbor/floats ns 8.93763e+06 1.84589e+06 4.842
174 ToCbor/jeopardy ns 7.14785e+07 2.10551e+07 3.395
175 ToCbor/signed_ints ns 1.13863e+07 2.74211e+06 4.152
176 ToCbor/small_signed_ints ns 1.02822e+07 2.37622e+06 4.327
177 ToCbor/twitter ns 636979 144369 4.412
178 ToCbor/unsigned_ints ns 8.04576e+06 2.74066e+06 2.936
179 ToJsonStrings/copy ns 5.85988e+06 5.60056e+06 1.046
180 ToJsonStrings/move ns 5.92335e+06 3.04643e+06 1.944
181 Unflatten/canada ns 4.17811e+07 1.08132e+07 3.864
182 Unflatten/citm_catalog ns 9.80315e+06 3.53672e+06 2.772
183 Unflatten/twitter ns 4.56968e+06 2.16566e+06 2.110
docs/mkdocs/scripts/figures/data/perf_timeline.csv
+361
View File
@@ -0,0 +1,361 @@
index,commit,date,pr,subject,parse_twitter,parse_citm,parse_canada,parse_citm_compact,parse_twitter_ifstream,accept_twitter,dump_twitter,dump_citm,dump_canada,dump4_citm,from_cbor_twitter,to_cbor_twitter,copy_destroy_citm,equal_citm,view_parse_twitter,view_parse_citm,view_parse_canada
0,55f93686c0,2025-04-11,,Merge branch 'release/3.12.0',3571.487,8219.609,17049.073,4366.792,3846.006,2394.213,1441.213,1375.446,7510.989,1917.809,3463.281,695.524,1643.327,1956.891,,,
1,1705bfe914,2025-04-11,4727,:bookmark: set version to 3.12.0 (#4727),3589.331,8245.422,17079.250,4422.711,3894.787,2397.597,1440.546,1377.745,7514.698,1922.371,3498.997,695.559,1655.240,1967.301,,,
2,4cca3b9cb2,2025-04-13,4738,Fix warning and add emscripten CI step (#4738),3559.657,8195.105,17066.291,4373.011,3794.269,2388.900,1419.182,1355.724,7420.703,1912.038,3468.667,664.214,1631.610,1939.475,,,
3,96c1b52f1c,2025-04-15,4742,Fix conversion to std::optional (#4742),3573.838,8157.276,16993.208,4383.656,3858.927,2395.092,1438.169,1372.208,7497.776,1925.481,3482.185,667.895,1633.619,1946.687,,,
4,88c92e605c,2025-04-16,4744,Fix compilation failure and warnings with NVHPC (#4744),3563.149,8039.911,16922.739,4381.927,3768.560,2385.086,1407.564,1345.578,7370.063,1897.474,3462.010,662.955,1623.286,1925.804,,,
5,c67d538274,2025-04-17,4749,Fix C4702 warning and extend MSVC CI job (#4749),3585.422,8251.057,17050.448,4400.542,3896.586,2390.655,1440.391,1371.722,7453.474,1921.277,3478.523,667.911,1636.206,1939.531,,,
6,756ca22ec5,2025-04-23,4736,Provide fallback for missing `char8_t` support (#4736),3559.146,8139.703,17085.114,4387.658,3856.745,2392.849,1424.997,1370.599,7477.537,1907.661,3484.427,665.541,1634.156,1957.401,,,
7,6b9199382b,2025-04-27,4763,Add missing header (#4763),3541.323,8077.761,17011.636,4359.183,3842.380,2396.686,1421.116,1363.737,7431.375,1902.909,3474.250,664.442,1625.644,1934.732,,,
8,3b02afb9d9,2025-04-28,4760,Specialize char_traits for std::byte to fix from_msgpack (fixes #4756) (#4760),3583.070,8198.146,17134.698,4381.743,3899.872,2409.185,1440.233,1380.810,7504.838,1921.781,3500.125,666.078,1657.207,1966.036,,,
9,eef76c200e,2025-04-28,4764,Make library work with C++20 modules (#4764),3528.529,8080.458,16936.656,4330.570,3764.287,2363.848,1407.851,1358.079,7356.239,1897.423,3455.287,665.194,1632.255,1937.675,,,
10,dff2b4756c,2025-04-29,4765,fix: BJData size calculation overflow (#4765),3553.706,8141.375,17047.511,4360.144,3797.070,2389.756,1417.737,1364.718,7454.313,1921.962,3479.878,666.456,1644.760,1944.696,,,
11,9110918cf8,2025-05-04,4748,Fix typos (#4748),3563.682,8176.427,17239.354,4398.055,3891.669,2399.782,1441.669,1387.133,7516.073,1925.323,3483.271,669.348,1647.760,1957.747,,,
12,46e7cd3dc2,2025-05-16,4775,Replace deprecated std::is_trivial in C++26 (#4775),3565.242,8195.396,17135.646,4373.479,3851.604,2392.258,1418.425,1370.958,7464.854,1909.844,3485.046,665.606,1643.155,1952.329,,,
13,828c891427,2025-05-16,4786,Extend type_name() to invalid type (#4786),3549.573,8103.761,17066.198,4359.911,3804.849,2389.121,1428.584,1366.405,7424.838,1914.434,3452.497,667.452,1632.750,1928.324,,,
14,4b17f90f65,2025-05-22,4609,Add `ignore_trailing_commas` option (#4609),3544.662,8132.052,16997.375,4344.592,3825.765,2382.755,1408.435,1367.468,7460.448,1924.522,3434.062,733.089,1631.356,1891.572,,,
15,b19f058465,2025-06-01,4802,Encode infinity and NaN as float for MsgPack and CBOR (#4802),3550.020,8126.438,17350.885,4327.596,3825.419,2389.356,1409.422,1376.649,7363.802,1921.226,3441.081,683.190,1624.144,1886.388,,,
16,cf16c5ab9f,2025-06-02,4805,Use binary_t::value_type (#4805),3551.735,8143.521,17153.291,4309.477,3829.229,2387.640,1428.550,1385.585,7415.271,1932.347,3425.838,657.735,1631.586,1888.954,,,
17,d70e46bc65,2025-06-25,4830,:bug: add missing header to input_adapters.hpp (#4830),3546.448,8157.469,17062.364,4335.300,3805.221,2382.796,1422.863,1382.581,7411.401,1928.676,3433.190,691.842,1632.972,1892.453,,,
18,30d27df61c,2025-07-31,4871,Fix CI (#4871),3570.015,8150.859,17070.625,4330.078,3806.505,2400.329,1434.947,1381.065,7425.718,1931.556,3429.632,656.545,1633.515,1892.916,,,
19,efcf9efb4f,2025-08-02,4873,Fixes #4854 Explicitly handle nullptr in sax_parse (#4873),3520.381,8050.719,16883.042,4331.820,3861.906,2368.069,1408.435,1375.954,7363.651,1898.466,3432.992,653.988,1634.141,1894.948,,,
20,4106af8d92,2025-08-20,4896,":rotating_light: suppress cppcoreguidelines-c-copy-assignment-signature,misc-unconventional-assign-operator (#4896)",3540.599,8175.265,17010.438,4345.182,3866.833,2393.935,1435.100,1389.496,7453.724,1945.791,3433.169,657.446,1638.434,1900.360,,,
21,a63795caf1,2025-10-22,4791,:rotating_light: avoid deprecation warning (#4791),3550.057,8174.646,16983.177,4363.521,3888.336,2393.305,1423.434,1376.334,7469.407,1936.013,3447.279,666.706,1645.354,1903.707,,,
22,1cc56b2dcd,2025-10-23,4957,Address CWG issue 2521 (#4957),3557.396,8119.651,17072.730,4351.881,3834.739,2386.097,1442.100,1393.245,7474.463,1932.315,3446.883,660.187,1638.983,1896.000,,,
23,54be9b04f0,2025-10-23,4960,:page_facing_up: update REUSE (#4960),3554.625,8098.287,17115.219,4324.578,3809.950,2390.791,1424.488,1376.715,7422.828,1913.208,3424.693,659.030,1623.405,1892.756,,,
24,29913ca760,2025-10-25,4963,Add char8_t* overload for _json and _json_pointer (#4963),3544.899,8169.203,17007.844,4353.594,3797.630,2392.108,1423.032,1375.216,7349.787,1909.897,3428.771,655.625,1635.273,1891.018,,,
25,515d994acb,2026-01-01,5044,:page_facing_up: adjust year (#5044),3524.610,8059.521,16949.416,4313.508,3773.750,2364.742,1410.427,1372.988,7382.438,1915.502,3403.159,643.968,1618.972,1884.213,,,
26,8f75700141,2026-01-11,4958,support types convertible to string_view as JSON keys (#4958),3546.757,8142.599,17103.386,4327.739,3825.990,2388.540,1420.515,1379.309,7413.062,1924.540,3433.677,658.266,1628.079,1890.759,,,
27,457bc283ff,2026-01-12,5039,fix(cbor): reject overflowing negative integers (#5039),3508.883,8077.291,16930.011,4305.982,3785.698,2378.693,1425.526,1366.111,7407.042,1929.142,3478.909,657.722,1636.304,1944.681,,,
28,e3014f162a,2026-01-13,5052,Fix conversion to std::optional (#5052),3547.995,8140.052,17010.031,4321.914,3797.807,2385.856,1430.414,1386.202,7407.260,1930.403,3462.213,657.829,1629.579,1932.066,,,
29,5ed07097fa,2026-01-13,5050,Fix -Wtautological-constant-out-of-range-compare in serializer (#5050),3544.136,8180.208,17033.209,4339.591,3799.779,2391.940,1427.870,1387.871,7368.765,1922.321,3454.938,659.367,1630.707,1959.722,,,
30,25f48639c7,2026-01-23,5016,Reference tuple from json (#5016),3563.180,8209.037,17030.969,4388.675,3895.086,2392.088,1430.666,1393.853,7528.567,1934.347,3481.351,677.234,1645.418,1957.591,,,
31,f8eee1bb79,2026-02-07,5071,Annotate unreachable comment-scanner switch paths to satisfy C26819 (#5071),3508.000,8128.750,16958.959,4315.235,3797.237,2371.963,1425.146,1374.867,7453.381,1930.211,3456.508,658.568,1629.188,1909.736,,,
32,fd17b0889e,2026-05-08,5139,Remove nullptr safety check from sax_parse functions (#5139),3544.101,8033.021,16963.292,4334.102,3800.736,2382.583,1419.050,1361.745,7357.073,1907.153,3429.315,657.041,1618.815,1937.829,,,
33,62f3b41b30,2026-05-08,5090,fix: treat single-element brace-init as copy/move instead of wrapping in array (#5074) (#5090),3550.323,8168.713,17060.031,4349.417,3794.110,2380.583,1416.822,1361.182,7369.651,1897.717,3466.731,659.297,1631.463,1941.905,,,
34,4fad446897,2026-05-10,5162,docs: add IDs to @requirement tags to fix Doxygen autolinking (#5162),3545.440,8031.891,17069.448,4324.698,3802.862,2383.513,1422.768,1384.602,7325.776,1917.606,3469.787,659.011,1631.296,1940.370,,,
35,a0a4e7cc0b,2026-05-13,5152,Add front methods to json_pointers (implements #4889) (#5152),3582.898,8215.010,17034.448,4345.515,3891.513,2396.572,1432.733,1395.714,7554.119,1934.008,3484.859,659.298,1642.314,1957.356,,,
36,93e49decbd,2026-05-14,5167,Fix incomplete-type error in set_parents with ordered_json (#5167),3555.224,8147.771,17017.073,4320.846,3831.318,2386.750,1435.840,1385.578,7436.864,1927.483,3466.508,658.409,1632.724,1939.528,,,
37,7192763f15,2026-05-14,5163,Fix compile error when using nlohmann ordered_map with WITH_DEFAULT macros (#5163),3520.675,8039.145,16892.291,4303.448,3769.198,2363.337,1410.030,1364.679,7380.797,1913.285,3437.278,660.130,1630.738,1943.235,,,
38,5a05627b1f,2026-05-14,5169,:rotating_light: fix warning (#5169),3600.555,8160.854,16979.031,4324.070,3887.823,2389.157,1430.983,1387.106,7509.984,1912.601,3473.713,663.279,1652.982,1958.774,,,
39,bb5404bb86,2026-05-15,5164,Fix GCC C++20 modules compilation #5103 (#5164),3543.823,8120.266,17015.395,4349.300,3794.880,2364.178,1414.408,1374.548,7484.218,1920.495,3444.266,699.326,1626.241,1954.688,,,
40,b1bb9fce0c,2026-05-15,3929,Fix for printing long doubles bug in dump_float (#3929),3549.378,8089.891,16934.927,4313.310,3824.802,2386.958,1412.164,1385.425,7417.869,1930.513,3461.151,651.557,1618.735,1944.450,,,
41,cba5dc0ed8,2026-05-16,4563,New macros for the named JSON convertor generation (#4563),3544.657,8168.182,16990.886,4327.688,3806.963,2370.975,1421.629,1390.206,7454.151,1919.284,3452.456,677.413,1623.622,1941.921,,,
42,47202c804a,2026-05-18,5171,Add missing overload to ordered_map::find (#5171),3527.542,8168.312,17141.989,4409.456,3887.378,2397.007,1428.765,1387.033,7495.604,1935.710,3485.088,660.155,1648.977,1951.430,,,
43,58cfecf7f7,2026-05-18,5151,Serialize enum (#5151),3521.302,8100.104,16805.489,4288.463,3763.971,2381.494,1408.713,1383.059,7328.261,1915.202,3440.372,648.726,1617.661,1922.608,,,
44,584e6b1cfb,2026-05-22,5187,Fix: update() parent pointers not updated after recursive merge with JSON_DIAGNOSTICS (#5187),3550.639,8083.463,17055.198,4326.833,3804.257,2381.519,1432.039,1381.986,7377.844,1915.159,3460.750,656.873,1631.527,1940.953,,,
45,02dfbea39d,2026-06-17,5209,added explicit instantiations of 'has_from_json' and 'has_to_json' for std_fs::path (#5209),3552.209,8215.474,17167.760,4338.404,3845.144,2398.026,1425.012,1387.629,7458.614,1931.388,3475.343,658.183,1644.329,1958.324,,,
46,fc1df0b7db,2026-06-23,5172,:recycle: remove unnecessary if (#5172),3562.088,8175.531,17044.042,4336.583,3863.651,2404.695,1425.872,1389.434,7523.855,1914.128,3481.000,653.259,1639.515,1957.649,,,
47,c5b2b26fdc,2026-06-29,5217,:memo: fix docs (#5217),3526.825,8052.307,17000.011,4343.963,3793.412,2388.194,1416.706,1374.177,7361.646,1904.008,3463.919,658.322,1627.765,1921.887,,,
48,b7566c6293,2026-06-30,5161,Harden JSON_HAS_RANGES detection for incomplete C++20 ranges implementations (#5161),3538.995,8071.787,17120.751,4318.797,3772.445,2384.008,1421.440,1385.239,7419.292,1898.929,3431.466,647.948,1602.258,1928.644,,,
49,adf78d3a76,2026-06-30,5215,Minor: unique_ptr template resolution workaround for MSVC (#5215),3550.380,8138.026,17036.802,4366.062,3842.430,2389.536,1426.658,1385.609,7428.787,1915.233,3467.188,658.332,1636.158,1942.556,,,
50,272411c5e6,2026-06-30,5218,Overwork project infrastructure (#5218),3547.487,8087.250,16962.198,4341.969,3793.831,2387.509,1420.888,1381.072,7450.078,1930.003,3466.193,659.676,1631.329,1943.043,,,
51,730b57775d,2026-07-01,5222,:bug: avoid assertion in patch (#5222),3539.912,8169.771,17027.229,4345.151,3790.753,2376.552,1421.263,1386.717,7399.985,1923.237,3455.722,653.609,1630.914,1934.028,,,
52,ca49ab6123,2026-07-02,5223,Extend value to arrays when using JSON pointers (#5223),3550.341,8113.787,16951.313,4346.805,3793.097,2391.224,1409.695,1380.075,7374.073,1926.401,3458.438,659.382,1629.387,1941.306,,,
53,8d7e0046f4,2026-07-02,5224,Add std::format and fmt support (#5224),3546.935,8170.406,16968.927,4346.906,3814.956,2387.612,1424.861,1386.542,7350.765,1900.376,3461.177,662.476,1633.858,1930.434,,,
54,31dd15b258,2026-07-02,5221,Fix ambiguous static_cast (#5221),3551.945,8213.000,17131.271,4373.620,3845.763,2393.074,1438.633,1385.769,7471.146,1927.804,3486.568,662.015,1631.810,1958.901,,,
55,eed1587000,2026-07-05,5234,Reconstruct lexer diagnostics lazily for seekable input (#120) (#5234),3145.909,5311.094,15381.843,4292.961,3851.260,1966.833,1422.598,1365.461,7443.276,1920.467,3467.060,702.832,1637.587,1905.758,,,
56,83c87cb9e0,2026-07-05,5233,Read binary strings/blobs in bulk chunks with a memcpy fast path (#5233),3141.867,5259.485,15454.959,4326.664,3797.198,1987.623,1406.492,1372.765,7424.729,1899.726,2363.895,667.502,1630.097,1888.392,,,
57,acf076a677,2026-07-06,5238,Fix ADL leak of nlohmann::detail through basic_json's default base class (#5238),3152.153,5277.073,15291.407,4338.828,3839.331,1995.524,1429.960,1365.917,7456.776,1907.928,2398.016,670.257,1627.590,1897.997,,,
58,c05c5e229b,2026-07-07,5241,Add missing copyright notices to SBOM (#5241),3147.485,5268.865,15319.584,4321.823,3796.972,1981.167,1432.689,1371.264,7465.416,1918.083,2388.154,667.119,1630.745,1891.583,,,
59,366f3d26e5,2026-07-08,5235,Replace snprintf with a branch-free writer for \uXXXX escapes (#5235),3127.641,5272.302,15425.239,4340.459,3850.357,1997.957,1459.603,1356.461,7509.703,1899.916,2366.966,668.383,1624.981,1889.145,,,
60,f8e99e856c,2026-07-09,5248,Fix nvcc CUDA 12.0/12.1 C++20 ranges parse error (#3907) (#5248),3132.099,5226.375,15164.510,4301.901,3769.651,1967.647,1456.759,1365.810,7530.724,1908.635,2381.610,683.815,1616.699,1879.795,,,
61,855f511db4,2026-07-09,5250,Fix stale Clang -Weverything suppression comments; drop -Wno-missing-noreturn (#5250),3126.792,5208.338,15352.520,4293.596,3800.544,1969.497,1458.601,1329.851,7372.849,1876.404,2368.894,662.173,1603.881,1874.673,,,
62,d0a43141ea,2026-07-09,5253,Fix #3868: Remove operator!= to enable P2468R2 rewritten candidate synthesis (#5253),3165.182,5270.458,15479.031,4302.729,3845.646,1989.231,1474.135,1343.312,7443.282,1887.909,2392.523,670.395,1634.871,1894.474,,,
63,b630f5e9c7,2026-07-10,5260,Fix container input_adapter SFINAE for lvalue-only ADL begin/end (#5260),3128.117,5263.807,15375.677,4330.544,3819.953,1982.196,1454.088,1339.062,7364.683,1877.699,2361.482,666.486,1616.514,1920.626,,,
64,c60217e801,2026-07-11,5205,fix: support constructing json from C++20 range views (#4916) (#5205),3117.539,5206.552,15308.166,4320.513,3798.713,1983.458,1447.072,1350.950,7357.213,1875.632,2340.731,662.905,1633.357,1934.261,,,
65,fe2bcc080f,2026-07-11,5266,Custom BinaryType direct assignment (#5266),3174.528,5284.562,15383.645,4328.120,3895.086,1996.913,1478.427,1355.569,7512.115,1899.236,2398.490,672.118,1642.910,1967.660,,,
66,ca76c37650,2026-07-11,5265,Add iterator+sentinel tests and docs for binary deserializers (#5265),3134.265,5218.021,15352.521,4306.284,3791.612,1967.824,1451.953,1358.685,7508.828,1891.697,2377.848,665.474,1631.495,1934.907,,,
67,c197feff81,2026-07-12,5268,Extend memcpy fast path to sized sentinels (e.g. std::counted_iterator) (#5268),3116.271,5207.146,15415.771,4272.443,3815.851,1984.966,1451.103,1341.093,7328.037,1865.385,2383.169,664.494,1617.967,1915.428,,,
68,1c5a953de5,2026-07-19,5276,reject unpaired UTF-16 surrogates in wide-string input (#5276),3155.360,5299.631,15419.812,4302.089,3853.104,1987.259,1468.653,1349.665,7549.432,1911.365,2457.555,680.311,1653.282,1955.673,,,
69,3565f40229,2026-07-20,5284,reject negative UBJSON/BJData string length (#5284),3170.456,5301.698,15404.416,4351.226,3893.594,1997.034,1470.907,1358.245,7491.480,1909.601,2401.384,671.260,1639.865,1963.899,,,
70,9a3ebb9456,2026-07-23,5287,validate BSON document size against the bytes read (#5287),3157.646,5264.062,15305.271,4338.672,3839.643,1987.196,1461.356,1351.630,7444.791,1890.626,2398.503,665.262,1655.798,1930.268,,,
71,8ec98e2c9e,2026-07-27,5313,adding cleanups to bson writer (#5313),3150.448,5268.948,15445.927,4308.612,3805.005,1989.643,1466.348,1349.591,7326.453,1895.842,2393.278,708.164,1644.025,1946.652,,,
72,2e23687092,2026-07-28,5314,to_bson() silently emits corrupt documents when a length exceeds INT32_MAX (#5314),3146.534,5254.547,15445.250,4304.008,3798.620,1986.260,1459.735,1345.534,7517.651,1903.996,2395.155,674.344,1644.565,1952.682,,,
73,868506dcc0,2026-07-30,5335,Fix CBOR half-float assertion bounds (#5335),3167.086,5267.068,15397.979,4351.011,3883.135,2003.345,1468.939,1360.483,7455.230,1909.055,2406.305,679.942,1643.646,1945.639,,,
74,dd24e2dffd,2026-07-30,5332,check all BSON reads and add an EOF check for booleans (#5332),3138.315,5284.833,15399.166,4310.513,3847.630,1980.682,1464.104,1344.108,7445.146,1901.512,2400.532,670.850,1635.196,1900.946,,,
75,fd72ecfc8c,2026-07-31,5301,validate ndarray element types in write_bjdata_ndarray (#5301),3164.662,5262.141,15399.010,4287.271,3849.318,1988.186,1460.688,1353.767,7458.380,1893.669,2398.485,668.466,1644.018,1921.615,,,
76,bc48951128,2026-07-31,5323,Fix UBJSON high-precision floating-point overflow handling (#5323),3155.628,5289.864,15474.375,4324.253,3888.966,2015.068,1477.846,1354.622,7480.730,1905.566,2415.428,668.997,1641.776,1911.819,,,
77,d94cbd99dc,2026-07-31,5274,reject CBOR array/map length equal to the indefinite-length marker (#5274),3144.041,5272.193,15466.980,4338.735,3848.849,1999.231,1459.129,1358.119,7507.307,1901.807,2394.972,667.016,1635.960,1899.878,,,
78,2222d386c9,2026-07-31,5339,fix: check CBOR tagged subtype reads (#5339),3095.768,5137.792,15064.146,4258.977,3755.229,1965.900,1454.890,1338.066,7399.068,1883.624,2358.193,660.190,1618.172,1939.713,,,
79,585929bff9,2026-08-03,5289,Fix Clang deprecation warning for json_pointer operator== with ordered_json (#5289),3142.341,5259.360,15258.271,4275.479,3807.672,1969.704,1453.688,1337.633,7451.037,1879.447,2364.966,661.560,1635.617,1945.709,,,
80,5f121d8c50,2026-08-03,5336,avoid sign extension in char_traits<signed char>::to_int_type (#5336),3145.000,5264.880,15441.521,4269.632,3796.781,1983.497,1440.810,1325.232,7427.750,1880.047,2361.899,663.772,1621.595,1912.378,,,
81,68f0722a19,2026-08-03,5342,remove discarded array from parent object in end_array (#5342),3161.273,5269.907,15312.469,4335.433,3840.510,1995.965,1465.745,1355.934,7474.901,1895.483,2401.197,657.397,1634.791,1901.902,,,
82,dca9d49a33,2026-08-05,5348,reject out-of-range code points in UTF-32 wide-string input (#5348),3119.753,5210.979,15209.260,4273.984,3799.034,1995.297,1459.456,1342.982,7431.646,1891.478,2370.364,653.618,1633.585,1882.753,,,
83,9a091d2b82,2026-08-05,5362,Do not write BJData ndarrays whose size overflows std::size_t (#5362),3137.381,5257.312,15286.084,4308.500,3805.325,1995.140,1468.138,1354.729,7510.088,1893.036,2384.577,659.394,1628.260,1890.245,,,
84,d5647e6a3b,2026-08-05,5355,Resolve the TODO(niels) in get_ubjson_string (#5355),3121.278,5249.927,15246.011,4292.737,3800.490,1967.087,1443.762,1333.226,7368.953,1862.131,2347.852,644.647,1623.909,1889.958,,,
85,bacdabd176,2026-08-05,5361,Fix start_pos() for strings containing escape sequences (#5361),3114.653,5251.619,15253.907,4331.818,3786.156,1960.676,1442.388,1330.247,7354.724,1863.306,2351.588,650.781,1623.543,1886.671,,,
86,1c136a66c4,2026-08-06,5363,Move the CBOR doc block to the function it describes (#5363),3124.274,5209.615,15411.897,4293.320,3812.156,1982.854,1457.653,1345.680,7422.343,1884.848,2387.050,656.076,1627.620,1878.737,,,
87,6285225fd0,2026-08-12,5211,Fix integer comparison bug (#5211),3159.557,5291.323,15395.395,4329.836,3867.200,1989.476,1456.052,1359.795,7526.860,1879.642,2396.137,659.077,1638.176,1900.416,,,
88,b5378e8deb,2026-08-19,5331,Fix CBOR tag handlers not recognizing tags 0-5 and 21-23 (#5331),3172.476,5239.812,15479.917,4295.539,3871.289,2003.439,1473.447,1343.742,7516.875,1888.412,2400.572,645.588,1641.621,1886.531,,,
89,2f025f401e,2026-08-25,5380,Throw other_error.502 when UBJSON use_type is set without use_size (#5380),3155.873,5190.312,15144.406,4286.388,3793.805,1968.199,1442.240,1340.929,7373.610,1860.543,2370.570,648.906,1631.207,1893.750,,,
90,35705d79d8,2026-08-28,5414,Fix update(merge_objects=true) throwing on primitive-to-object merge (#5414),3169.029,5252.578,15387.292,4340.690,3893.646,1979.616,1472.286,1361.543,7491.302,1903.909,2401.404,659.396,1641.697,1912.409,,,
91,137a40b9aa,2026-09-05,5459,Compare integers with floats exactly instead of widening the integer (#5459),3134.229,5259.349,15404.541,4300.146,3846.646,1992.155,1467.919,1351.774,7467.146,1887.255,2391.467,660.347,1631.735,1891.751,,,
92,3c875683a5,2026-09-05,5461,Make diff() linear when an array shrinks (#5461),3141.068,5259.000,15271.166,4319.659,3797.088,1983.450,1455.354,1354.676,7444.860,1891.687,2389.333,657.163,1632.998,1887.016,,,
93,09b6b6b5ba,2026-09-05,5455,Fix to_bjdata() emitting unparsable output when _ArraySize_ is not an array (#5455),3161.542,5253.047,15311.718,4291.388,3834.264,1992.744,1472.685,1357.680,7409.479,1889.287,2389.501,698.680,1628.237,1888.705,,,
94,faa35cc647,2026-09-09,5484,Skip integer conversion in accept()/SAX validation when the value is unused (#5484),3103.654,5222.453,15458.573,4215.765,3804.320,1935.161,1468.660,1353.499,7452.052,1883.191,2383.524,654.441,1631.700,1885.664,,,
95,6d86cc0f6b,2026-09-09,5490,Speed up whitespace skipping in the lexer (#5490),3181.328,5276.318,15307.312,4262.771,3877.401,1977.062,1465.196,1356.119,7594.177,1906.814,2388.615,684.926,1636.950,1893.526,,,
96,c05347dd54,2026-09-09,5475,Undefine the four JSON_HEDLEY_* macros that leak after including json.hpp (#5475),3147.932,5156.625,15347.990,4217.505,3871.812,1982.807,1458.787,1354.934,7639.328,1879.823,2370.342,674.625,1637.257,1903.903,,,
97,d6660cf718,2026-09-09,5485,Route hand-rolled diagnostic pragmas through Hedley (#5485),3116.151,5215.531,15257.499,4189.979,3835.023,1974.111,1459.363,1342.996,7553.802,1887.698,2379.999,669.934,1635.350,1877.492,,,
98,c9477ccf91,2026-09-09,5496,Throw when JSON Patch remove's target path resolves through a primitive or null parent (#5496),3138.841,5258.401,15315.417,4201.008,3874.682,1967.630,1446.393,1335.060,7542.708,1870.111,2390.141,668.484,1634.138,1886.981,,,
99,8c38e270b5,2026-09-09,5497,Reject JSON Patch move when from is a proper prefix of path (#5497),3183.820,5280.000,15346.969,4222.164,3839.596,1970.753,1470.428,1351.838,7515.344,1895.809,2389.731,673.696,1633.247,1889.546,,,
100,a316738cfa,2026-09-09,5471,Add JSON_HEDLEY_WARN_UNUSED_RESULT to the current accept() overloads (#5471),3175.891,5281.302,15397.062,4240.576,3934.333,1981.765,1475.890,1353.387,7625.104,1896.181,2401.097,669.729,1646.133,1895.638,,,
101,c9f1d2d646,2026-09-09,5477,Broaden JSON_HEDLEY_WARN_UNUSED_RESULT coverage to pure query functions (#5477),3171.706,5286.880,15430.844,4264.242,3880.943,1979.990,1472.289,1357.283,7569.854,1904.026,2407.487,671.673,1641.521,1889.053,,,
102,8e26b9d4b3,2026-09-09,5495,Make contains(json_pointer) return false instead of throwing on unrepresentable array-index tokens (#5495),3163.789,5240.755,15337.698,4226.154,3880.956,1971.912,1475.322,1357.125,7632.281,1904.060,2401.190,678.863,1638.371,1903.385,,,
103,b17c272f46,2026-09-09,5472,Reserve capacity in from_json() object conversion when the target container supports it (#5472),3152.899,5257.645,15401.000,4210.846,3885.123,1989.159,1476.637,1359.851,7639.396,1898.981,2408.243,670.075,1633.528,1894.086,,,
104,3e2de32226,2026-09-10,5516,Remove unused iomanip include (#5516),3141.349,5253.657,15364.074,4203.969,3847.620,1968.422,1455.035,1352.754,7582.494,1882.051,2371.814,663.504,1630.172,1870.223,,,
105,d69fb8654d,2026-09-10,5501,Return the parsed value by move from from_cbor() and friends (#5501),3133.485,5231.662,15309.926,4183.200,3835.662,1971.125,1462.447,1349.563,7479.136,1904.202,1595.991,661.519,1630.278,1883.994,,,
106,4a93aa4e2f,2026-09-10,5283,"Speed up parsing of contiguous input (numbers, strings, UTF-8) (#5283)",1963.879,4221.308,11609.531,3278.497,3857.880,927.779,1483.726,1357.793,7483.343,1906.916,1481.419,676.438,1643.746,1895.551,,,
107,bfb07786cd,2026-09-10,5473,Fix to_bjdata() silently truncating out-of-range _ArrayData_ elements (#5473),1941.894,4204.971,11726.688,3264.055,3808.784,923.797,1453.071,1351.760,7458.125,1891.470,1473.508,662.164,1633.043,1888.548,,,
108,ff80ed3295,2026-09-11,5285,"Speed up dump(), and keep it from overflowing the stack (#5285)",1939.289,4175.541,11781.291,3233.302,3816.101,914.071,441.200,540.473,6895.041,852.214,1478.197,656.635,1632.675,1885.303,,,
109,da42a627dc,2026-09-11,5449,Stop dump() from heap-allocating its output adapter per call (#5449),1937.658,4200.966,11639.198,3235.493,3827.695,909.901,448.948,537.008,6909.036,839.027,1479.968,659.210,1643.621,1878.065,,,
110,1dc1d09fc6,2026-09-11,5457,Do not search a container for the value the callback rejected (#5457),1937.459,4140.078,11576.803,3271.838,3845.193,924.316,450.148,539.031,6848.776,844.624,1470.333,671.563,1645.624,1900.347,,,
111,fae364db24,2026-09-11,5458,Move the scanned string into the value instead of copying it (#5458),1986.146,4110.787,11757.157,3150.932,3830.550,918.517,442.629,539.606,6913.104,843.920,1417.037,655.259,1628.224,1892.991,,,
112,dd50f0eb16,2026-09-11,5502,Stop CBOR indefinite-length strings from recursing per chunk (#5502),1987.853,4033.182,11613.834,3116.378,3841.164,915.943,442.366,539.480,6864.130,836.458,1431.035,656.146,1599.574,1885.858,,,
113,4bb2de8cc5,2026-09-11,5503,Reject a nested BJData ndarray dimension vector where it is read (#5503),1981.298,4086.276,11569.240,3141.539,3829.870,923.087,444.038,539.863,6800.724,835.434,1429.637,655.448,1628.999,1879.300,,,
114,44f8ec30e9,2026-09-11,5504,Bound UBJSON optimized arrays of a valueless type (#5504),2005.265,4092.265,11730.198,3130.635,3863.992,925.033,448.222,542.323,6893.078,849.901,1437.855,662.171,1638.306,1896.324,,,
115,0dd8ca9023,2026-09-11,5505,Read MessagePack containers without recursing per nesting level (#5505),2019.983,4105.305,11862.979,3142.581,3891.601,927.092,447.942,543.936,6939.963,845.634,1442.889,656.578,1637.512,1897.815,,,
116,91ab3e81f5,2026-09-11,5506,Read CBOR containers and tags without recursing per nesting level (#5506),1986.334,4039.961,11554.094,3118.761,3783.101,912.504,440.410,534.894,6831.943,834.661,1439.061,655.287,1615.619,1869.912,,,
117,a14619b354,2026-09-11,5507,Read UBJSON and BJData containers without recursing per nesting level (#5507),2011.959,4095.868,11782.688,3135.264,3873.604,926.014,447.638,541.304,6905.838,846.051,1468.512,664.161,1629.083,1898.772,,,
118,0452641c18,2026-09-11,5508,Read BSON documents without recursing per nesting level (#5508),1974.160,4043.887,11662.938,3095.011,3832.744,916.007,439.914,534.149,6904.453,835.615,1450.792,648.298,1616.917,1874.133,,,
119,aa391dc0a5,2026-09-11,5520,Fix two develop CI regressions: dump() nodiscard warning and binary-reader const-correctness (#5520),2003.010,4068.010,11771.364,3137.266,3825.247,924.668,442.416,539.478,6847.083,841.996,1460.659,649.378,1633.738,1885.897,,,
120,a50c2537eb,2026-09-12,5476,Reserve capped array capacity in json_sax_dom_parser::start_array() for definite-length binary arrays (#5476),1986.488,4063.883,11588.333,3077.995,3827.479,908.419,440.959,539.114,6806.177,833.555,1452.851,662.422,1627.995,1915.388,,,
121,c0b2878a44,2026-09-13,5493,Swap diagnostic positions in basic_json::swap() (#5493),2010.881,4081.057,11734.730,3130.919,3882.258,925.490,450.092,542.953,6925.188,848.486,1480.051,698.636,1643.508,1933.941,,,
122,1da2f68992,2026-09-14,5522,Only reserve array capacity if the array type supports it (#5522),1972.122,4048.622,11775.062,3107.938,3803.528,909.385,441.204,535.885,6793.927,842.843,1446.330,658.787,1619.239,1899.164,,,
123,6487678bc5,2026-09-15,5464,Fix swap(array_t&)/swap(object_t&) to update parent pointers under JSON_DIAGNOSTICS (#5464),2023.028,4116.169,11737.438,3165.172,3893.266,924.912,448.959,541.529,6970.438,852.039,1483.231,689.631,1635.240,1937.356,,,
124,c72f37a40d,2026-09-15,5443,Support custom object/array types and improve template parameter handling (#5443),2001.617,4076.547,11666.583,3109.756,3918.206,923.197,450.592,542.266,6901.703,846.558,1468.284,660.116,1641.586,1905.840,,,
125,502e9d66f6,2026-09-16,5479,Fix to_bjdata() emitting the Draft-3-only 'B' marker in default Draft-2 mode (#5479),1970.935,4018.060,11445.500,3079.409,3809.050,910.459,444.217,539.291,6851.407,833.755,1444.697,698.040,1626.601,1889.024,,,
126,c41152e620,2026-09-16,5494,Fall back to plain-object encoding when to_bjdata()'s _ArrayType_ annotation is not a string (#5494),1979.481,4054.688,11734.292,3085.542,3819.351,916.992,445.126,539.870,6853.005,833.190,1457.166,665.391,1629.586,1888.734,,,
127,e564136c22,2026-09-22,5465,Make diff() account for member order in ordered_json objects (#5465),1970.519,4063.744,11605.198,3087.497,3848.867,915.695,447.051,539.711,6835.172,841.402,1452.004,664.560,1640.751,1890.473,,,
128,e485441123,2026-09-22,5466,Restore a duplicate key's prior value when the callback rejects its new value (#5466),2012.920,4099.265,11796.895,3156.818,3913.812,931.464,451.403,541.419,6981.041,846.536,1469.521,704.138,1633.327,1905.709,,,
129,a2b19d6158,2026-09-22,5467,Honor allow_exceptions=false for excessive array/object size (out_of_range.408) (#5467),1996.478,4084.422,11734.208,3129.099,3850.854,923.499,446.555,539.379,6949.427,842.029,1453.166,694.200,1631.133,1888.865,,,
130,d2c1a6a272,2026-09-22,5468,"Reject array insert(pos, first, last) iterators not pointing into an array (#5468)",1983.767,4066.651,11618.667,3128.505,3848.427,914.900,447.603,541.973,6915.265,844.307,1458.762,677.699,1638.789,1892.443,,,
131,0b20b7e622,2026-09-22,5469,Reject MessagePack/BSON binary subtypes that don't fit their wire format (#5469),2010.548,4097.476,11681.218,3121.010,3866.146,925.619,448.533,540.786,6957.000,843.349,1463.518,658.302,1630.857,1902.522,,,
132,1054b2097e,2026-09-23,5286,Speed up binary writing: value-type output sink + byte-swap number encoding (#5286),1989.739,4101.393,12034.438,3157.240,3853.987,910.115,449.084,555.970,6884.386,864.526,1471.905,656.635,1661.806,1926.233,,,
133,ed513715a8,2026-09-24,5534,Document that a NUL byte in the input is treated as end of input (#5534),2016.236,4104.763,11906.323,3141.138,3936.240,916.611,455.397,562.053,6987.917,871.110,1475.622,657.877,1676.934,1936.557,,,
134,56b3ee566c,2026-09-24,5389,Fix stack overflow when copying a deeply nested value (#5387) (#5389),1998.356,4051.206,11660.865,3101.107,3834.672,910.072,452.943,544.464,6908.974,849.212,1460.691,638.644,1650.749,1914.423,,,
135,918da64657,2026-09-24,5542,Keep BJData ndarray annotations that would not survive a round trip as objects (#5542),2003.009,4042.969,11517.375,3095.122,3815.360,908.444,448.415,539.423,6911.041,840.044,1449.543,671.530,1651.709,1908.408,,,
136,8699de3064,2026-09-24,5555,Stop allocating the BJData excluded-marker list per container (#5555),2001.718,4071.333,11686.427,3122.065,3796.757,900.895,447.123,539.918,6860.765,844.752,1444.435,646.608,1644.943,1879.295,,,
137,2e91641de2,2026-09-24,5544,"Test JSON_BRACE_INIT_COPY_SEMANTICS for real, and fix one-element tuples under it (#5544)",2004.785,4083.914,11662.270,3119.602,3917.914,922.465,454.869,547.631,6987.234,853.010,1469.612,649.946,1672.246,1913.098,,,
138,7c90ec2323,2026-09-24,5546,Hash deeply nested values without recursing per nesting level (#5546),1952.912,4071.159,11594.927,3117.497,3793.052,900.729,444.245,539.787,6854.406,841.264,1457.530,643.139,1638.578,1890.482,,,
139,4daca40d7b,2026-09-24,5547,Merge deeply nested objects without recursing per nesting level (#5547),2008.226,4104.399,11619.542,3148.604,3918.175,921.207,457.191,547.553,6942.265,855.352,1464.974,651.924,1665.232,1915.869,,,
140,01b53c8c15,2026-09-25,5552,Keep JSON_DIAGNOSTICS parent pointers of ordered_json members after erase() and update() (#5552),1979.354,4061.378,11603.480,3098.586,3875.258,919.125,455.911,546.269,6940.026,849.511,1461.751,648.841,1660.978,1917.254,,,
141,abbe52d6de,2026-09-25,5344,Add JSON_PRECISE_STREAM_POSITION to leave the character that terminates a number in the stream (#5344),2001.170,4081.617,11653.531,3131.331,3876.208,915.153,453.436,546.720,6971.864,848.900,1463.182,647.946,1662.943,1906.246,,,
142,02dd3e67f2,2026-09-25,5390,Fix stack overflow and exponential runtime when comparing nested values (#5390),1987.861,4074.039,11596.000,3161.284,3901.497,919.541,447.553,543.948,6910.162,845.668,1455.759,664.224,1652.074,1930.575,,,
143,465407f3ce,2026-09-25,2818,Improve error message for const fields (#2818),1975.274,4118.565,11863.448,3130.541,3880.764,910.767,452.904,545.363,6906.890,843.118,1459.728,645.770,1654.265,1934.900,,,
144,632a5812a8,2026-09-25,5272,Support zero-member types in NLOHMANN_DEFINE_TYPE_* macros (#4041) (#5272),1963.323,4021.526,11747.959,3102.006,3784.896,904.545,444.355,543.748,6840.604,841.416,1438.306,639.223,1649.816,1930.274,,,
145,d19f7f5dce,2026-09-25,5185,Fix BSON conformance issue (#5185),1958.606,4048.536,11541.011,3086.805,3817.875,900.452,446.001,544.071,6824.323,837.078,1971.245,641.271,1651.209,1934.647,,,
146,c60a0bc336,2026-09-25,5573,Allocate the deep copy's key scratch space with the provided allocator (#5573),1965.216,4021.459,11630.855,3074.078,3807.258,902.782,444.394,542.562,6919.969,840.942,1975.668,645.827,1637.429,1918.607,,,
147,1e44262091,2026-09-25,5560,Make JSON_STRICT_NUL_HANDLING part of the ABI tag (#5560),1961.862,4069.617,11594.083,3117.500,3817.758,909.186,448.820,544.420,6845.802,844.016,1977.909,645.864,1651.269,1937.217,,,
148,95e9a5931c,2026-09-25,5553,"Write BSON in linear time, without recursing per nesting level (#5553)",1965.832,4033.394,11589.364,3120.422,3792.091,905.110,446.984,543.328,6794.244,844.943,1991.659,640.188,1647.675,1928.562,,,
149,fe4a544c7e,2026-09-27,5515,handled when size exceed uint32 (#5515),1998.244,4047.208,11755.209,3091.776,3815.000,908.733,447.990,546.295,6903.084,850.946,1993.351,645.487,1654.343,1933.385,,,
150,4fa95d9810,2026-09-27,5583,Remove unreachable branches from the binary writer (#5583),1983.323,4038.331,11666.480,3092.841,3844.935,910.149,449.697,541.110,6840.583,830.604,1979.750,653.542,1650.670,1928.883,,,
151,6178982b8d,2026-09-27,5582,Compare unordered objects by key below the nesting bound (#5582),1971.706,4073.498,11600.646,3132.700,3830.323,910.231,448.982,538.812,6836.770,846.149,2007.607,657.180,1653.089,1934.675,,,
152,f7972970a4,2026-09-27,5584,Throw instead of writing MessagePack lengths beyond UINT32_MAX (#5584),1969.417,4013.021,11602.447,3083.552,3842.495,904.223,447.444,542.170,6862.735,839.628,2000.766,655.034,1653.006,1939.922,,,
153,6bd106893a,2026-09-27,5559,Fix CBOR tag handling in cbor_tag_handler_t::store for non-binary items (#5559),1969.250,4034.693,11691.500,3119.171,3827.860,916.053,455.026,542.577,6886.360,839.718,2012.919,653.031,1651.090,1931.698,,,
154,1e101ecac1,2026-09-27,2998,Add BON8 support (#2998),1975.804,4082.375,11658.542,3192.828,3758.141,907.029,444.920,556.470,6844.698,849.276,1977.153,649.181,1645.306,1920.836,,,
155,9e1a09eec0,2026-09-28,5594,Name the key type when rejecting non-string CBOR/MessagePack map keys (#5594),2006.582,4151.784,11788.532,3156.156,3845.052,915.647,454.027,557.846,6814.282,864.094,2021.072,654.095,1663.051,1947.078,,,
156,fc03b9912e,2026-09-28,5597,"Look up the locale decimal point at conversion time, not lexer construction (#5597)",2020.431,4172.916,12716.958,3196.958,3909.774,910.001,449.314,547.334,6900.968,852.306,2048.019,665.843,1696.937,1982.586,,,
157,5b9ffae8bb,2026-09-30,5616,Move the float conversion chain out of the lexer (#5616),1992.332,4167.328,12638.573,3212.515,3842.885,906.649,446.941,539.674,6952.672,839.042,2021.057,695.813,1684.689,1967.216,,,
158,d268eaa693,2026-09-30,5617,Convert floats with Eisel-Lemire when std::from_chars is unavailable (#5617),1987.608,4086.125,11507.062,3170.013,3830.425,898.856,445.077,542.854,6919.568,839.210,2021.918,666.925,1701.466,1951.211,,,
159,65af260117,2026-09-30,5609,Move instead of deep-copy ordered_json values when an object grows (#5609),1998.981,4134.057,11592.855,3192.779,3863.005,904.702,446.575,539.685,6850.886,840.845,2035.646,680.331,1682.755,1968.744,,,
160,6a8a7735ed,2026-09-30,5614,Do not throw in contains() for an empty array reference token (#5614),2008.447,4144.024,11612.176,3165.468,3842.060,905.045,443.941,539.755,6846.042,846.248,1998.713,669.752,1684.717,1953.487,,,
161,0050d0f7a4,2026-09-30,5637,Share one nesting depth limit between all bounded descents (#5637),2021.078,4170.581,11589.886,3224.963,3937.021,906.411,448.033,541.177,6911.391,848.641,2040.978,670.005,1703.593,1984.639,,,
162,68beba727c,2026-09-30,5679,Fix from_json() for enums with underlying type bool (#5679),1986.468,4139.033,11632.833,3201.351,3798.006,888.464,438.471,535.903,6843.110,836.030,1996.109,685.053,1672.430,1940.598,,,
163,fc4c9c3446,2026-09-30,5680,Fix clear() to also reset the subtype of a binary value (#5680),1972.561,4094.867,11540.157,3155.722,3833.925,893.243,445.764,539.739,6848.562,843.068,2016.293,664.788,1685.759,1965.342,,,
164,678fd3017b,2026-09-30,5681,Fix element path for map/unordered_map JSON_DIAGNOSTICS errors (#5681),2014.783,4164.471,11563.614,3219.865,3891.917,892.727,445.945,542.044,6900.807,844.422,2034.323,669.901,1688.051,1981.601,,,
165,6d7845d207,2026-09-30,5683,Fix deprecated json_pointer/string operator== warning in value() (#5683),1965.197,4105.789,11501.364,3157.544,3800.289,898.122,445.399,539.685,6900.433,834.541,2000.133,652.354,1670.945,1960.876,,,
166,42f89e3130,2026-09-30,5684,Let to_json(std::optional<T>) propagate exceptions from T's to_json (#5684),2016.899,4156.430,11476.489,3216.315,3895.245,908.714,444.300,541.764,6923.422,839.459,2018.934,672.859,1689.306,1987.428,,,
167,6218aa212b,2026-09-30,5687,Throw std::length_error for operator[](SIZE_MAX) instead of corrupting the array (#5687),1989.158,4149.156,11547.229,3193.015,3845.187,905.308,446.389,541.290,6853.266,843.028,2037.245,661.213,1681.390,1966.649,,,
168,1151826508,2026-09-30,5691,Take diff()'s fast path unless the object type reorders members (#5691),1991.280,4147.341,11570.312,3171.182,3847.333,904.510,441.250,539.803,6885.776,836.303,2018.693,665.307,1685.990,1970.057,,,
169,e444a66276,2026-09-30,5693,Copy values before inserting an initializer list into an array (#5693),2000.774,4175.507,11546.979,3189.357,3841.169,897.455,442.384,539.493,6839.688,836.213,2014.519,667.390,1685.418,1968.991,,,
170,bfea6f36d3,2026-09-30,5694,Fix to_msgpack() reading the inactive number union member (#5694),1997.465,4144.279,11549.781,3224.287,3855.120,899.475,441.995,539.924,6903.776,839.550,2019.396,664.487,1688.249,1954.211,,,
171,5b11a0282c,2026-09-30,5697,Exchange the CustomBaseClass subobject in basic_json::swap() (#5697),1987.983,4074.349,11483.114,3174.632,3841.604,893.256,438.279,535.885,6866.641,834.328,1996.396,660.828,1676.300,1936.210,,,
172,44a88d85be,2026-09-30,5698,Fix NLOHMANN_JSON_SERIALIZE_ENUM_STRICT's from_json message (#5698),1972.237,4125.945,11373.917,3158.716,3810.039,890.097,438.075,534.577,6867.432,842.045,2028.150,664.206,1681.353,1936.231,,,
173,bfe0f32d71,2026-09-30,5699,Fix std::terminate and null pointer access in input_stream_adapter (#5699),2014.371,4159.779,11667.416,3200.425,3876.135,911.716,448.788,543.198,6932.657,852.397,2056.197,668.764,1699.573,1984.479,,,
174,4bb1b14b06,2026-09-30,5702,Trim the compiler-appended NUL from wide/UTF string literals too (#5702),1979.723,4105.685,11603.562,3180.932,3846.698,906.188,443.969,534.534,6837.479,840.588,2006.043,654.851,1672.289,1965.408,,,
175,5bd766aa50,2026-09-30,5703,Move to_bson's binary subtype check into calc_bson_sizes (#5703),1999.606,4183.386,11588.646,3192.771,3844.425,900.169,446.795,541.406,6888.114,847.107,2022.637,663.480,1686.702,1974.777,,,
176,6ae17630a4,2026-09-30,5705,"Reject integral keys for contains(), find(), and count() at compile time (#5705)",2000.405,4157.120,11551.656,3197.417,3891.646,903.558,448.544,541.553,6914.203,848.561,2042.578,663.661,1691.910,1974.341,,,
177,7fd6895788,2026-09-30,5706,Hide a discarded container's content from the parser callback (#5706),1971.987,4075.362,11463.219,3164.909,3797.453,889.534,443.974,535.026,6857.323,835.793,2025.343,651.970,1687.670,1951.428,,,
178,66877675b1,2026-09-30,5719,"Check the iterator range for binary values in basic_json(first, last) (#5719)",1970.369,4104.886,11534.635,3168.601,3796.291,897.271,444.655,538.917,6826.990,842.445,2016.962,650.099,1673.940,1953.693,,,
179,2ea6d8c127,2026-09-30,5720,Require the found key to equal the looked-up key when comparing objects (#5720),2015.556,4188.886,11567.125,3251.890,3863.818,903.970,448.691,540.422,6912.255,843.774,2044.479,653.832,1676.634,1951.959,,,
180,67435c9c7e,2026-09-30,5721,Give a deep copy its type only after its container exists (#5721),1994.257,4160.658,11600.553,3218.367,3880.128,900.769,449.260,541.607,6899.448,841.635,2043.909,666.759,1694.646,1974.861,,,
181,6fc0d501f3,2026-09-30,5610,Move the user-defined string literals to <nlohmann/json_literals.hpp> and add JSON_NO_AUTOMATIC_UDLS (#5610),2021.715,4187.888,11647.594,3209.388,3925.060,911.591,450.961,544.303,6975.265,845.109,2049.853,670.295,1697.019,1987.428,,,
182,fdcc569eee,2026-09-30,5692,Use only documented StringType members in json_pointer (#5692),1965.264,4147.273,11378.188,3159.364,3787.758,889.399,447.397,535.062,6809.698,835.116,2015.202,656.241,1689.072,1955.238,,,
183,6a073dbae4,2026-09-30,5695,Give operator>> a strong exception-safety guarantee (#5695),2010.979,4211.982,11698.218,3205.401,3897.172,898.499,445.961,545.225,6898.870,847.042,2051.316,664.716,1706.401,1981.247,,,
184,3b6ae43c53,2026-09-30,5598,Add JSON_DISABLE_TUPLE_REFERENCE_CONVERSION to fix std::tuple conversions (#5598),2025.122,4195.468,11682.199,3204.529,3924.068,904.766,448.209,544.669,7041.276,849.103,2047.488,665.592,1695.987,1984.755,,,
185,7d7055ec50,2026-09-30,5723,Fix stack overflow converting deep values between specializations (#5723),1985.310,4117.099,11457.052,3157.591,3832.175,895.910,442.225,535.237,6864.375,833.653,2001.760,679.826,1674.819,1956.998,,,
186,35802e78d6,2026-09-30,5735,Remove dead Makefile targets; document macro_builder; tidy serve_header (#5735),2004.498,4163.065,11590.594,3184.810,3902.229,906.494,447.394,539.542,6923.969,845.596,2044.457,666.187,1692.019,1977.030,,,
187,c261578431,2026-09-30,5730,Deduplicate binary reader/writer helpers and fix stale comments (#5730),1968.723,4154.789,11441.718,3160.367,3870.578,889.545,443.139,535.314,6850.886,837.281,2024.650,660.842,1691.628,1978.000,,,
188,1d675cdb46,2026-09-30,5733,Fix CI jobs that check less than they claim; move arm64 to GitHub (#5733),1995.704,4206.185,11691.125,3227.622,3966.104,909.748,449.770,541.566,6951.938,852.506,2009.592,663.701,1686.265,1983.285,,,
189,a32f61eb98,2026-09-30,5678,Fix update() and merge_patch() when the argument is *this or one of its members (#5678),2014.810,4157.101,11636.135,3210.326,3924.659,899.344,448.133,541.371,6913.401,841.487,2038.263,667.515,1697.503,1980.686,,,
190,18dd5663b0,2026-10-01,5548,Diff deeply nested values without recursing per nesting level (#5548),1990.931,4152.500,11469.697,3204.740,3985.593,903.248,448.981,540.974,6929.740,847.493,2040.504,665.352,1698.903,1981.438,,,
191,3926fcaac3,2026-10-01,5729,"Deduplicate serializer dump code; fix stale includes, docs, and lint (#5729)",1999.556,4178.489,11581.000,3208.657,3876.755,891.669,452.445,538.525,6893.078,846.721,2042.010,662.154,1689.653,1975.503,,,
192,cff0a61369,2026-10-01,5731,Share DOM SAX position handling; fix stale parser and lexer comments (#5731),2017.231,4112.604,11588.291,3157.047,3890.343,902.329,458.713,539.539,7020.568,847.995,2073.873,654.562,1696.823,1978.381,,,
193,e400780533,2026-10-01,5745,Re-amalgamate single_include (#5745),1980.338,4100.659,11418.854,3166.896,3835.432,885.298,452.886,538.053,6888.203,824.666,2031.410,650.846,1668.952,1949.107,,,
194,6aec1a085f,2026-10-02,5677,Report BON8 input that ends after a UTF-8 lead byte as truncated (#5677),2003.321,4099.066,11614.364,3159.029,3849.857,899.995,459.542,539.436,6904.474,843.221,2071.503,652.303,1685.702,1972.556,,,
195,4d46bce4e1,2026-10-02,5750,Fix CI on develop (#5750),1962.685,4025.677,11277.718,3103.052,3785.213,894.610,448.583,533.887,6870.062,834.856,2020.231,658.339,1674.874,1954.242,,,
196,63c10a51fc,2026-10-02,5638,"Review and extend the documentation, and check it in CI (#5638)",1968.954,4036.851,11425.135,3104.359,3797.852,902.519,451.067,537.668,6910.375,852.438,2043.889,674.938,1701.314,1971.711,,,
197,6d0867a85f,2026-10-02,5751,Make comparisons with scalars noexcept only when the conversion is (#5751),2008.360,4091.453,11376.562,3144.575,3820.110,903.850,455.980,538.035,6851.885,841.549,2010.128,667.182,1690.586,1970.957,,,
198,d11e89471b,2026-10-04,5606,Assert on missing array indices in const operator[] and document the JSON pointer case (#5606),2000.121,4075.695,11475.520,3139.456,3837.211,900.437,453.703,538.895,6921.432,845.064,2027.417,663.969,1679.148,1964.082,,,
199,df27cc3d4c,2026-10-04,5682,Add scalar-on-left overloads for legacy discarded comparisons in C++20 (#5682),2010.838,4092.432,11495.625,3125.726,3873.167,911.281,456.807,538.386,6911.630,844.451,2033.630,688.219,1691.407,1971.697,,,
200,6f2048cd5d,2026-10-04,5685,Accept lvalues in ordered_map::emplace's value parameter (#5685),1999.816,4095.006,11445.740,3136.685,3924.146,918.692,458.336,542.423,6968.520,848.783,2037.096,667.772,1708.274,2002.449,,,
201,0d01d6ae90,2026-10-04,5686,Classify leaves with operator<=> itself past the nesting bound (#5686),1983.320,4116.981,11466.250,3192.969,3923.208,914.596,456.625,539.558,6975.537,849.252,2056.035,701.221,1716.493,1983.908,,,
202,b730946432,2026-10-04,5689,Fix key types convertible to std::string_view breaking lookups (#5689),1990.288,4060.487,11377.709,3107.537,3803.857,892.191,451.727,538.045,6896.480,844.989,2018.884,658.649,1676.566,2023.638,,,
203,49cd427196,2026-10-04,5690,"Copy-construct the base class of a deep copy's elements, not assign it (#5690)",1983.320,4033.156,11333.843,3138.547,3882.878,894.785,454.473,538.337,6918.619,841.205,2072.151,655.193,1693.871,1977.288,,,
204,756b28c2b8,2026-10-04,5696,Keep a NUL byte ending a // comment as the end of input (#5696),1985.931,4099.331,11579.875,3148.560,3872.422,896.276,451.436,536.774,6901.156,845.631,2014.820,648.054,1685.199,1971.762,,,
205,1edf0ef041,2026-10-04,5700,"Fix value(json_pointer, default) aborting under JSON_NOEXCEPTION (#5700)",1987.233,4076.133,11442.625,3124.099,3888.688,898.266,454.349,539.423,6950.140,852.803,2030.279,654.586,1691.751,1978.197,,,
206,a212d3b2e4,2026-10-04,5722,Preserve the object comparator's state in a deep copy past the nesting bound (#5722),2000.138,4113.471,11391.854,3151.006,3866.904,905.695,455.384,539.504,6929.818,842.213,2029.619,674.438,1697.044,1983.856,,,
207,1df1e8a845,2026-10-04,5591,Make cross-string-type basic_json conversion explicit without implicit conversions (#5591),2000.533,4107.994,11370.989,3160.854,3881.635,897.877,455.201,540.307,6927.167,840.130,2053.458,664.118,1697.618,1982.876,,,
208,38a2db260c,2026-10-04,5728,Remove dead metaprogramming and duplicated code in traits and pointers (#5728),1971.450,4040.828,11319.270,3109.521,3819.505,903.606,451.137,538.725,6825.640,843.951,2016.652,663.160,1684.596,1958.896,,,
209,c5650eaa3c,2026-10-04,5704,Reject malformed UTF-16/UTF-32 units in wide-string input (#5704),2006.689,4133.594,11469.209,3180.930,3881.633,902.924,456.572,540.557,6992.385,850.474,2025.267,652.367,1680.025,1957.468,,,
210,40021f38fb,2026-10-04,5589,Add basic_json::as_base_class and document name conflicts with custom base classes (#5589),2012.673,4147.193,11453.250,3167.448,3892.542,910.149,457.238,541.642,6998.084,852.247,2049.759,652.868,1688.229,1972.508,,,
211,73e9eae3c1,2026-10-04,5746,Add an error_handler parameter for UTF-8 to the binary readers and writers (#5746),2013.845,4130.237,11456.041,3135.688,3818.956,892.111,449.408,538.308,6825.213,835.872,1495.468,697.054,1679.760,1970.285,,,
212,d8d47be4a5,2026-10-04,5754,Fix CI on develop after merging the ready-to-merge PRs (#5754),2013.191,4119.948,11573.656,3173.029,3941.703,912.201,459.208,541.264,7013.364,848.908,1514.681,699.273,1685.391,1984.652,,,
213,6b4b825af2,2026-10-04,5607,Handle numbers that do not fit narrow number types in the binary readers (#5607),2009.190,4044.127,11362.677,3127.688,3827.841,892.131,449.386,534.731,6915.360,829.562,1487.640,697.206,1688.237,1952.157,,,
214,8c1f60a45e,2026-10-04,5600,Store maps with enum keys as objects (opt-in) (#5600),2008.560,4128.059,11523.011,3187.763,3843.177,912.520,456.427,537.514,6859.010,839.685,1501.515,696.508,1688.848,1968.910,,,
215,c5a7a4b46d,2026-10-04,5688,"Add deprecated from_bon8/from_bjdata(ptr, len) overloads (#5688)",2030.310,4108.505,11412.907,3141.836,3899.435,904.756,455.298,541.069,6926.151,846.240,1504.193,700.820,1693.983,1987.713,,,
216,23d3b373e1,2026-10-04,5755,Add JSON_DELETE_DEPRECATED_FUNCTIONS to delete the deprecated functions (#5755),2018.708,4106.015,11533.729,3134.945,3826.409,899.623,452.833,538.544,6846.443,830.555,1509.060,705.724,1692.819,1971.476,,,
217,8a142bc436,2026-10-06,5764,"Fix CI on develop after #5600, #5607, and #5755 (#5764)",2017.533,4151.854,11526.334,3195.240,3884.953,907.457,456.697,540.114,6891.136,844.145,1517.241,699.051,1690.344,1972.104,,,
218,5379e04ce4,2026-10-06,5761,Throw type_error.321 when serializing discarded values to binary formats (#5761),1999.156,4055.300,11427.521,3153.581,3836.060,891.927,455.413,540.938,6883.093,853.094,1510.099,701.888,1686.695,1982.806,,,
219,0a365865f9,2026-10-06,5762,Make basic_json destruction allocation-free and non-recursive (#5762),2024.289,4081.646,10719.428,3112.958,3900.503,924.900,462.081,540.765,6965.453,850.019,1511.381,669.802,1620.269,1912.078,,,
220,5ecb704f6b,2026-10-06,5592,Speedup; check for the expected separator before the lexer's token switch (#5592),1920.428,3801.979,10139.250,2891.862,3833.159,823.859,451.951,540.310,6885.672,843.570,1512.778,668.793,1608.501,1885.206,,,
221,6d4543e743,2026-10-06,5767,Fix destroy() for ObjectTypes without reverse iteration (#5767),1929.030,3843.266,10232.541,2911.458,3926.867,830.030,450.002,542.043,6938.890,846.589,1515.211,675.264,1622.245,1904.006,,,
222,9b179cee1e,2026-10-06,5770,Handle all value_t enumerators in has_no_children() (#5770),1931.275,3794.497,10155.125,2891.927,3871.831,829.432,446.176,535.126,6909.625,833.114,1498.945,677.571,1615.785,1884.043,,,
223,69874e4544,2026-10-06,5760,Fix NUL bytes in UBJSON/BJData high-precision numbers (#5760),1924.896,3853.081,10247.750,2926.515,3872.041,835.227,453.025,541.002,6919.037,842.240,1521.169,674.487,1607.441,1880.884,,,
224,162e13b86f,2026-10-06,5758,Add with_*_t alias templates to create basic_json types with changed template parameters (#5758),1938.268,3842.126,10289.968,2914.104,3962.414,834.967,455.536,543.630,6969.266,850.082,1530.064,678.054,1635.303,1916.763,,,
225,21a69230bd,2026-10-06,5585,Create a value before giving it its type (#5585),1918.165,3829.354,10247.656,2914.619,3874.909,832.287,451.252,543.791,6873.995,839.514,1521.088,699.604,1615.742,1894.449,,,
226,ff6f3d7d4a,2026-10-07,5766,Reject nested indefinite-length CBOR string chunks (#5766),1926.074,3868.810,10256.823,2919.802,3957.807,832.129,457.241,543.640,7024.745,847.770,1522.612,705.623,1634.212,1918.402,,,
227,1c754cfe31,2026-10-07,5701,Copy a pair-shaped array value under JSON_BRACE_INIT_COPY_SEMANTICS (#5701),1930.652,3828.195,10263.927,2921.570,3901.404,832.628,455.652,541.701,6909.037,843.563,1512.309,704.354,1623.254,1909.917,,,
228,24dd7c63f0,2026-10-07,5777,Re-amalgamate after #5740 (#5777),1908.632,3833.930,10278.146,2905.443,3935.422,838.465,454.491,545.605,6905.047,839.087,1519.816,709.223,1618.643,1886.706,,,
229,30e542e52a,2026-10-07,5776,Declare the namespace-scope constants in to_chars.hpp inline (#5776),1934.934,3823.724,10229.636,2916.698,3929.565,829.102,452.279,543.038,6951.995,837.059,1524.049,720.722,1619.823,1903.938,,,
230,367336c83d,2026-10-07,5779,Fix CI on develop after #5585 (#5779),1928.921,3780.927,10153.395,2883.604,3877.750,824.488,451.999,543.662,6927.395,835.495,1506.387,694.058,1622.903,1907.732,,,
231,069ace74af,2026-10-07,5707,"Round-trip BJData ND-array annotations exactly (single precision, key order) (#5707)",1937.387,3843.716,10184.302,2923.323,3936.570,827.610,456.123,543.169,6907.756,847.020,1515.229,696.202,1626.001,1901.142,,,
232,43fe8928e1,2026-10-07,5781,Stop binary writers overflowing the stack on deep values (#5781),1961.046,3868.274,10300.573,2899.792,3982.526,845.594,461.395,543.298,7059.093,846.696,1522.728,697.717,1623.846,1921.370,,,
233,a5f5d3059b,2026-10-07,5772,Make std::hash<basic_json> consistent with operator== for numbers (#5772),1949.220,3857.159,10170.427,2890.052,3981.349,840.234,459.334,541.947,6953.786,843.495,1509.713,703.339,1627.086,1911.653,,,
234,a269794db7,2026-10-08,5782,Use MSVC intrinsics for full multiplication (#5782),1931.869,3817.742,10159.666,2902.820,3903.263,840.740,455.827,540.621,6884.562,843.272,1513.776,702.028,1614.459,1901.008,,,
235,69a0c1b82c,2026-10-09,5328,Avoid allocating temporary basic_json for cbor and msgpack object keys (#5328),1909.579,3777.560,10065.682,2852.732,3897.659,833.289,459.856,540.631,6882.354,833.998,1498.288,314.059,1609.343,1906.714,,,
236,374dfe4f0f,2026-10-09,5791,Keep converted object keys alive while writing UBJSON and BJData (#5791),1911.274,3827.188,10159.553,2886.568,3890.388,833.632,459.800,542.649,6954.547,838.507,1509.324,314.357,1613.655,1892.838,,,
237,44e8597701,2026-10-09,5792,Flatten deeply nested values without recursing per nesting level (#5792),1940.103,3811.779,10139.396,2865.050,3874.896,835.001,459.686,544.065,6866.943,836.862,1496.298,314.617,1614.837,1891.741,,,
238,2913e96433,2026-10-09,5793,Unflatten in time and memory linear in the pointer depth (#5793),1908.453,3785.099,10262.147,2878.961,3920.657,845.619,459.806,543.998,6874.813,832.659,1486.901,312.175,1589.620,1863.981,,,
239,84ee12a67c,2026-10-09,5797,Make UTF8_ACCEPT/UTF8_REJECT inline variables to avoid TU-local exposure in modules (#5797),1922.691,3792.849,10162.656,2871.562,3887.719,836.308,456.522,542.577,6912.807,840.369,1497.447,313.683,1609.988,1899.591,,,
240,1649d9eda4,2026-10-11,5783,Use and extend the detail helpers to remove duplicated code (#5783),1916.258,3804.242,10297.344,2913.118,3847.662,836.519,453.270,538.750,6953.015,832.774,1506.068,324.715,1596.974,1875.878,,,
241,2cca04ae6f,2026-10-11,5800,Report one-character non-numeric array indices like longer ones (#5800),1932.327,3803.750,10135.438,2881.041,3894.622,840.016,458.569,538.037,6842.948,829.444,1499.722,324.811,1607.194,1875.851,,,
242,74a03dec84,2026-10-11,5802,Throw type_error.321 for discarded values in to_bon8 (#5802),1924.695,3814.854,10084.239,2873.180,3848.498,839.406,450.575,534.181,6893.005,834.300,1503.369,324.389,1607.323,1887.871,,,
243,e8b747e4bc,2026-10-11,5808,Re-amalgamate single_include after #5795 and #5806 (#5808),1937.995,3840.622,10221.990,2896.024,3885.568,834.394,458.874,539.771,6906.182,839.793,1517.689,324.800,1609.838,1890.885,,,
244,40a62947d3,2026-10-12,4965,support JSON Merge Patch (RFC 7396) diff creation (#4965),1932.021,3822.188,10248.416,2924.560,3980.331,842.462,459.010,540.237,6978.526,838.941,1529.508,326.435,1636.153,1917.472,,,
245,f23830b65e,2026-10-13,5809,Derive the lexer position lazily for seekable input (#5809),1814.075,3368.028,9974.755,2807.532,3943.229,647.639,457.018,551.206,6954.166,843.355,1522.762,315.716,1618.953,1903.816,,,
246,aa9620fb15,2026-10-13,5810,Skip the indentation after a newline 8 bytes at a time (#5810),1719.629,2959.344,10139.771,2799.555,3939.292,592.867,465.821,545.858,6968.068,849.167,1519.774,315.385,1629.981,1907.253,,,
247,e839bbd1c0,2026-10-13,5813,"Export client-facing headers from json.hpp for IWYU / include-cleaner, and check clients in CI (#5813)",1725.742,2949.070,10136.603,2821.591,3919.927,589.957,463.642,544.851,6987.427,843.151,1517.562,314.425,1619.671,1903.613,,,
248,5b4c8f9b00,2026-10-14,5738,"Speed up the lexer: own float parser, string scan, and \u table (#5738)",1615.668,2934.565,8763.651,2794.503,3928.286,559.107,374.921,516.391,6937.140,815.776,1513.238,325.043,1625.226,1912.905,,,
249,91a7a94cc6,2026-10-14,5634,"Write doubles with the shortest digits (Żmij), digits in registers (#5634)",1613.126,2929.599,8708.599,2783.954,3874.248,548.449,363.632,468.127,2421.176,745.466,1511.406,323.743,1614.195,1900.392,,,
250,a6e9785ab6,2026-10-15,5831,Look up the key only once in the callback parser's key() (#5831),1589.309,2938.557,8798.823,2767.872,3882.154,547.301,364.257,467.833,2395.851,744.716,1506.830,316.192,1623.771,1899.458,,,
251,0c4e7c103c,2026-10-15,5834,Make flatten() linear for ordered_json (#5834),1625.754,2936.203,8755.088,2793.081,3879.740,557.529,366.745,468.359,2418.388,746.210,1524.325,315.954,1614.677,1898.544,,,
252,0a4b3a84ee,2026-10-15,5836,"Speed up JSON pointer parsing, formatting, comparison and lookup (#5836)",1622.914,2915.901,8819.073,2783.990,3922.758,558.429,366.216,470.019,2427.606,747.168,1526.881,316.972,1625.611,1912.601,,,
253,6ba53e63dd,2026-10-15,5833,Speed up array-to-container from_json (#5833),1626.155,2920.747,8777.989,2782.870,3988.206,560.154,367.695,469.892,2427.262,749.301,1529.474,316.399,1631.810,1915.217,,,
254,ca7740fef2,2026-10-15,5837,Move elements when converting rvalue containers to JSON (#5837),1615.747,2928.778,8765.792,2773.062,3926.456,561.034,367.498,469.807,2424.344,748.423,1523.215,316.339,1624.374,1894.455,,,
255,4530d9681c,2026-10-15,5832,Fix quadratic parent updates for ordered_json with JSON_DIAGNOSTICS (#5832),1618.937,2911.378,8794.094,2763.191,3886.974,555.789,366.475,469.275,2415.231,746.755,1512.590,315.856,1618.226,1899.284,,,
256,91869983a0,2026-10-15,5840,Make the value lifecycle inline-friendly (#5840),1595.075,2832.274,8420.390,2690.050,3876.841,555.209,366.118,469.783,2424.335,747.931,1485.914,314.048,1549.787,1775.823,,,
257,6a27b9acb2,2026-10-15,5838,Construct remaining hot-path exceptions out of line so core functions inline (#5838),1589.535,2824.360,8466.755,2699.690,3888.990,557.917,364.879,471.601,2422.995,746.543,1498.371,314.978,1539.656,1797.752,,,
258,4f11512641,2026-10-15,5835,"Speed up container destruction, iterator access and diff() (#5835)",1515.750,2714.756,8639.213,2574.698,3805.860,561.827,366.793,469.680,2421.769,748.727,1383.744,317.248,1446.525,1705.789,,,
259,ed86019a21,2026-10-15,5839,Move binary reader error construction out of line (#5839),1507.907,2766.774,8597.870,2622.289,3767.638,553.026,362.644,468.482,2408.731,744.936,1362.080,324.833,1445.531,1703.216,,,
260,6261d1e432,2026-10-15,5842,Construct the JSON Patch exceptions out of line (#5842),1532.015,2756.867,8670.677,2617.989,3869.133,558.865,365.834,469.932,2435.279,750.295,1380.628,327.010,1453.340,1705.232,,,
261,ce28c722bc,2026-10-15,5815,Allow the same type for number_integer_t and number_unsigned_t (#5815),1533.045,2775.807,8543.755,2615.412,3776.721,553.127,365.866,471.174,2433.384,745.309,1372.372,328.405,1452.848,1716.649,,,
262,91b9ee2602,2026-10-15,5829,Update cppcheck to 1.5.2 (Cppcheck 2.20) and fix its new findings (#5829),1516.450,2748.961,8571.521,2599.870,3807.744,557.303,367.220,472.209,2421.389,743.889,1379.405,326.087,1451.926,1710.506,,,
263,dcb96e82fb,2026-10-15,5822,Escape characters below 0x60 from a table straight into the write buffer (#5822),1525.777,2734.963,8524.771,2588.289,3790.726,557.907,360.057,463.574,2430.626,743.382,1375.816,325.308,1439.947,1695.307,,,
264,b41228c227,2026-10-15,5843,Fix AppVeyor failures from the Zmij double writer (#5843),1497.922,2690.614,8406.906,2582.482,3726.195,548.374,352.932,459.663,2398.953,737.639,1347.507,322.827,1429.640,1682.775,,,
265,4da73dc5ff,2026-10-15,5858,Fix compiler warnings on develop from the API performance stack (#5858),1523.138,2731.825,8474.073,2593.149,3782.769,553.758,359.180,462.915,2380.246,739.049,1346.755,324.909,1441.408,1698.043,,,
266,5683f5e024,2026-10-15,5859,Define less_general() only without three-way comparison (#5859),1504.689,2739.172,8603.693,2605.159,3797.057,560.213,358.865,464.429,2423.456,742.207,1374.000,326.702,1447.488,1712.379,,,
267,cd6b428ef0,2026-10-16,5860,Fix CI failures on develop from the API performance stack (#5860),1510.160,2732.695,8564.510,2603.242,3810.518,556.015,362.409,466.047,2437.364,745.153,1377.439,325.753,1444.892,1699.255,,,
268,cc8334113c,2026-10-19,5866,Do not use Qt's keyword macros as identifiers (#5866),1498.858,2732.644,8535.328,2587.258,3787.993,548.267,362.607,464.487,2403.147,735.633,1368.831,323.997,1442.709,1686.963,,,
269,4da932f518,2026-10-19,5828,Make parsing from std::istream and FILE* fast (#5828),1499.289,2723.605,8397.787,2597.237,1956.330,553.182,363.501,458.898,2397.342,733.054,1362.816,320.346,1429.314,1698.294,,,
270,122d718330,2026-10-21,5620,"Add json_document and json_view: node index, parser, and document (#5620)",1520.651,2751.099,8527.135,2588.494,1994.466,560.384,362.257,461.917,2393.611,741.198,1362.167,328.620,1441.211,1691.238,230.700,389.375,976.277
271,43e97b629b,2026-10-21,5622,"Add element access, iteration, values, and JSON pointers to json_view (#5622)",1493.875,2687.307,8383.354,2567.078,1986.311,547.934,353.938,462.380,2400.331,737.098,1374.560,322.012,1445.504,1686.421,231.353,386.679,958.441
272,4c3a3eb5b5,2026-10-21,5624,Add dump() and comparisons to json_view (#5624),1502.926,2714.747,8522.161,2608.565,2001.856,552.014,359.510,462.656,2393.110,732.091,1366.524,324.313,1442.119,1682.564,228.836,393.082,976.976
273,3ff37ead75,2026-10-21,5628,Scan json_view strings with SIMD and index large objects (#5628),1514.580,2728.619,8406.562,2609.758,2041.176,556.017,357.330,462.573,2383.158,733.939,1368.057,324.391,1442.711,1700.884,177.833,367.806,950.071
274,823eee3b59,2026-10-21,5630,"Add editable json_documents: set, push_back, insert, and erase (#5630)",1498.134,2754.810,8537.062,2588.474,1994.441,556.670,353.931,463.646,2392.987,740.023,1357.930,324.129,1441.622,1698.022,181.404,376.470,962.253
275,4971200b54,2026-10-21,5632,Add images of json_documents: save() and load() (#5632),1494.231,2681.211,8425.834,2543.276,1984.849,548.146,354.762,460.440,2414.747,734.679,1363.841,321.349,1421.806,1670.134,177.777,368.631,949.292
276,4155e2938f,2026-10-21,5633,Write json_view's dump() without a call or conversion per token (#5633),1500.247,2712.357,8612.193,2597.211,2012.860,558.559,359.889,462.371,2412.896,739.048,1372.456,324.070,1441.546,1697.571,180.320,371.514,954.088
277,08d7fbb0a1,2026-10-21,5874,Read FILE* input with std::fgetc under MemorySanitizer (#5874),1543.124,2758.211,8565.730,2584.453,2046.255,558.522,358.865,464.542,2421.435,743.715,1374.005,324.687,1462.572,1700.819,180.714,372.601,965.361
278,0cbe95ffa2,2026-10-21,5824,"Speed up writing CBOR and MessagePack, above all integer arrays (#5824)",1501.550,2706.534,8707.120,2584.807,2039.728,551.688,360.692,466.024,2397.182,742.777,1361.847,201.488,1429.223,1682.436,178.641,371.038,946.389
279,bd5227c2ec,2026-10-21,5805,Fix silent wrong results for custom number types (#5805),1511.036,2733.325,8786.406,2588.906,2000.483,553.456,360.458,465.989,2398.381,743.338,1370.524,201.168,1444.051,1701.345,179.776,372.557,954.733
280,e13e976801,2026-10-21,5851,Accumulate number digits while scanning them (#5851),1501.737,2667.570,7762.365,2523.289,1987.518,545.368,359.336,462.056,2407.652,739.226,1368.104,200.632,1440.390,1688.117,178.721,374.278,956.353
281,5e13f834c1,2026-10-21,5852,Copy the text of float tokens only when a SAX handler asks for it (#5852),1512.318,2655.312,7314.354,2515.044,2019.288,547.993,362.038,463.788,2410.262,745.839,1364.898,208.969,1450.422,1713.902,179.198,371.996,968.699
282,e9970066c5,2026-10-21,5853,"Scan strings with SSE2, SSSE3, or NEON (#5853)",1488.705,2654.404,7339.589,2551.050,2015.716,486.719,341.381,475.591,2434.369,756.973,1376.754,208.797,1449.981,1706.044,182.358,379.153,968.355
283,fa37b952df,2026-10-21,5854,Match literals without a stack array and keep parser states in bytes (#5854),1471.894,2619.164,7285.000,2485.883,1949.380,471.534,347.785,475.287,2413.552,751.487,1374.254,207.522,1443.177,1699.611,181.643,377.971,977.268
284,52fecc1fab,2026-10-21,5855,Move object keys into the value when parsing (#5855),1392.599,2628.688,7362.562,2485.293,1882.663,471.968,339.711,473.663,2414.903,751.376,1319.857,200.185,1448.057,1705.675,179.410,371.865,963.306
285,6aefd8c662,2026-10-21,5878,Copy short printable-ASCII strings without starting the scanner (#5878),1399.384,2664.401,7232.557,2535.425,1922.431,470.185,320.230,418.440,2446.082,696.786,1317.889,201.955,1447.217,1701.135,180.860,376.217,968.215
286,7c26e99ac5,2026-10-21,5879,Copy ASCII strings in the view's dump with ensure_ascii (#5879),1361.839,2610.182,7187.115,2471.708,1853.592,464.274,313.821,414.316,2388.840,687.851,1318.253,200.399,1434.986,1697.487,178.601,368.595,947.799
287,3e031b06a5,2026-10-21,5876,"Use standard library helpers where available, with C++11 fallbacks (#5876)",1381.599,2592.122,7336.719,2499.994,1848.434,467.895,315.257,415.788,2430.769,692.250,1311.164,200.424,1444.303,1698.311,180.149,374.484,961.091
288,9bf531436f,2026-10-21,5861,"Speed up flatten(), unflatten(), diff() and patch() (#5861)",1379.301,2613.219,7170.433,2472.628,1853.035,467.161,315.217,412.303,2406.597,683.062,1298.512,198.681,1434.089,1682.912,177.511,368.116,947.255
289,9855db81f3,2026-10-22,5881,Silence macro-to-enum for the endianness macros (#5881),1369.150,2613.547,7209.787,2476.232,1841.347,467.780,316.011,416.187,2415.504,686.920,1304.263,200.868,1441.243,1694.603,178.739,368.123,948.579
290,aa0b371f7c,2026-10-23,5884,"Faster std::istream input: inline get-area path, binary reads, unbuffered streambufs (#5884)",1375.030,2569.362,7218.375,2484.425,1743.476,470.240,319.245,403.750,2436.034,679.759,1319.508,201.531,1443.354,1698.057,180.133,372.206,946.488
291,86d5c56c54,2026-10-23,5886,"Speed up flatten(), unflatten(), diff() and patch() further (#5886)",1386.169,2622.331,7281.551,2495.923,1700.794,472.317,317.282,403.416,2409.097,682.507,1320.319,200.963,1444.908,1697.678,179.138,375.751,954.573
292,dec0e9b749,2026-10-23,5883,"Write strings, scalars and indentation in dump() with fewer calls (#5883)",1383.235,2621.847,7151.412,2491.644,1732.469,473.034,211.016,288.685,2276.953,416.068,1318.490,200.574,1452.099,1701.256,180.064,372.324,960.583
293,6fa14d8f95,2026-10-23,5885,Write binary formats through reserved sink space and number runs (#5885),1366.956,2600.914,7176.994,2465.343,1691.333,462.351,210.662,285.259,2301.553,417.589,1324.173,136.601,1429.240,1687.947,179.319,368.881,962.518
294,0b924f5375,2026-10-23,5887,Split and print JSON pointers in one pass (#5887),1377.526,2597.394,7242.688,2464.445,1739.841,466.382,211.716,288.202,2319.771,418.288,1318.592,138.744,1441.983,1706.639,179.684,372.087,976.078
295,e9c4fe3cdf,2026-10-24,5889,json_view: indented and ensure_ascii dumps through the fast writer (#5889),1393.007,2627.226,7248.287,2491.551,1769.642,469.976,211.665,291.327,2305.655,420.168,1319.431,139.577,1457.965,1712.927,182.274,377.741,983.284
296,dd7686a269,2026-10-24,5888,"json_view: faster reading, indexing and C-stream parsing (#5888)",1382.444,2607.026,7161.365,2472.635,1701.277,468.438,209.963,287.564,2276.329,415.511,1311.194,137.875,1439.700,1696.646,177.624,367.131,977.802
297,9c50bdd140,2026-10-24,5882,Make the DOM parser cheaper per container and per member (#5882),1392.673,2461.082,6068.625,2334.706,1696.950,475.550,209.313,291.776,2300.287,416.349,1317.581,138.194,1441.209,1707.720,178.751,367.339,978.031
298,01139dc192,2026-10-24,5905,Silence an Infer false positive in json_view materialize (#5905),1381.470,2463.013,6078.010,2335.216,1709.088,475.718,211.023,291.212,2275.302,418.098,1320.441,137.572,1443.434,1696.436,175.969,365.658,975.272
299,fe5e401870,2026-10-25,5901,Consolidate duplicated detail helpers and bodies (#5891) (#5901),1395.881,2462.765,6066.698,2327.708,1706.745,474.184,212.683,289.321,2283.842,417.657,1314.153,138.084,1442.796,1696.588,177.144,364.092,961.847
300,3eae5680d6,2026-10-25,5902,"from_json: number-first dispatch for arithmetic types, loop for std::array (#5902)",1397.343,2477.060,6080.864,2340.781,1711.774,481.523,213.618,289.360,2289.503,417.517,1313.541,138.271,1440.822,1695.785,178.731,367.293,983.555
301,2a56afc714,2026-10-25,5916,Fix VS 2015 build of the DOM parser (#5882) (#5916),1373.929,2476.139,6056.797,2341.890,1749.167,482.883,215.107,290.053,2292.495,417.441,1320.640,137.868,1445.227,1702.064,177.912,367.669,984.794
302,d6431a9104,2026-10-26,5918,Throw out_of_range.411 for JSON Patch add into a null parent (#5917) (#5918),1371.635,2445.905,6017.636,2314.178,1696.447,478.134,210.996,287.397,2278.718,414.186,1291.197,137.374,1436.212,1682.197,175.790,361.130,962.070
303,81d66291c5,2026-10-26,5358,Create objects for pointer tokens that cannot be array indices (#5358),1382.909,2465.649,6052.114,2332.556,1711.721,479.927,213.359,289.913,2289.412,417.201,1311.695,137.572,1437.168,1696.302,177.495,367.526,963.924
304,d5da84249f,2026-10-26,5927,"Skip CBOR tags in front of map keys, validate indefinite text chunks, fix CBOR docs (#5927)",1374.553,2476.464,6076.834,2346.075,1744.224,483.375,211.423,291.148,2287.800,420.247,1320.015,137.369,1449.068,1704.785,177.459,365.004,963.908
305,0c3570d44a,2026-10-26,5929,Validate the UBJSON/BJData container type marker for count 0; fix UBJSON docs (#5929),1381.462,2462.578,6055.183,2329.970,1713.086,484.962,210.683,290.024,2260.371,416.895,1319.093,137.782,1453.495,1706.801,177.031,361.025,962.952
306,dc768a7d5d,2026-10-26,5930,Fix BSON binary subtype 0x02 and check the declared document size earlier (#5930),1386.856,2463.400,6054.255,2337.105,1746.441,485.425,214.508,290.954,2314.702,418.769,1325.164,139.255,1452.125,1718.313,179.005,367.327,977.054
307,60107eda3f,2026-10-26,5931,"Read BJData ND-arrays of float16, restrict ND-array char to 0..127, correct BJData docs (#5931)",1389.051,2464.457,6049.084,2336.727,1710.473,483.159,213.007,288.990,2285.073,417.663,1317.537,137.893,1443.301,1697.126,178.706,364.051,962.202
308,731f1b5bfb,2026-10-26,5919,"json_view: view_mode enum instead of bool Editable, node_kind for node::kind (#5919)",1381.664,2428.529,5978.713,2333.485,1746.571,479.163,211.036,288.957,2281.592,416.990,1308.904,137.486,1447.665,1691.427,175.453,363.704,963.371
309,4cdfa6d0f4,2026-10-26,5920,json_view: no save() and load() on big-endian targets (#5920),1390.901,2477.841,6102.474,2337.925,1777.003,485.382,214.373,290.946,2303.147,421.178,1321.976,139.942,1446.726,1704.816,179.928,367.825,976.532
310,5a2819c940,2026-10-26,5921,json_view: one SIMD macro set with the library (#5921),1393.409,2479.841,6073.011,2350.336,1785.087,485.658,214.651,292.044,2304.448,418.026,1326.212,138.942,1468.981,1719.505,179.174,368.704,982.764
311,e5fe4ebdd2,2026-10-26,5922,json_view: from_json() of the macros reads views directly (#5922),1384.612,2467.078,6056.328,2337.309,1742.751,482.554,213.389,289.543,2299.118,417.521,1309.673,138.237,1448.628,1704.550,177.925,365.163,984.351
312,9e67bfa115,2026-10-26,5923,json_view: the library's std conversions read views directly (#5923),1395.103,2482.517,6066.604,2350.538,1751.603,482.504,213.399,290.185,2306.188,420.406,1317.415,138.730,1444.367,1708.720,178.016,369.111,975.875
313,21ec9bd801,2026-10-27,5915,json_view: fewer allocations when parsing small documents (#5915),1388.282,2469.118,6066.495,2340.391,1744.901,478.745,214.934,292.970,2309.264,422.842,1323.237,138.541,1454.151,1707.314,178.058,366.514,958.110
314,2bb2feeef4,2026-10-27,5942,"Fix the red CI on develop (json_view pointer tokens, bson, from_json tests, Infer, IWYU) (#5942)",1391.981,2468.266,6068.495,2335.707,1751.527,482.908,214.285,291.291,2300.453,417.876,1328.089,138.010,1454.934,1701.845,178.250,367.182,964.917
315,78a0687147,2026-10-27,5940,Strong exception guarantee for operator[](json_pointer) (#5940),1379.414,2467.492,6109.136,2335.309,1723.090,480.260,216.197,292.075,2313.798,415.444,1314.530,138.314,1449.629,1698.792,177.628,364.844,965.314
316,091c10d4a5,2026-10-28,5936,Fix self-aliasing in json_pointer::operator/= and patch_inplace (#5936),1389.195,2462.409,6052.125,2321.091,1722.944,473.064,214.421,290.952,2279.997,416.589,1315.370,138.531,1437.996,1683.844,176.596,363.105,952.473
317,54f6b3ef06,2026-10-28,5945,json_view: source positions in materialize() with JSON_DIAGNOSTIC_POSITIONS (#5945),1417.895,2496.591,6325.787,2377.105,1737.749,478.133,213.209,293.150,2304.971,422.648,1348.357,139.793,1490.556,1735.758,178.445,368.380,990.587
318,0115bb47b3,2026-10-30,5965,Name the source and license of adapted code in the file comments (#5965),1378.289,2456.731,6043.011,2330.780,1711.965,470.960,212.371,290.798,2298.443,419.433,1323.072,137.982,1441.316,1690.457,176.197,363.182,977.928
319,0b91f9ddd8,2026-10-30,5926,json_view: check_utf8 skips well-formed runs with the parser's string scan (#5926),1400.777,2488.449,6137.021,2359.856,1747.026,473.449,213.226,290.736,2320.524,420.950,1325.039,139.324,1452.907,1703.426,177.699,364.500,988.981
320,ea03d601af,2026-10-30,5890,json_view: comparison without temporaries and a faster image float check (#5890),1388.958,2477.531,6127.547,2357.032,1781.238,477.111,216.144,293.938,2340.267,424.058,1337.149,139.387,1459.923,1723.919,,,
321,755bb16d7a,2026-10-30,5966,Fix the red CI on develop: remove the duplicate is_editable in basic_json_view (#5966),1411.867,2497.560,6085.938,2326.880,1726.740,480.376,212.294,292.134,2312.521,420.608,1325.345,138.544,1465.640,1744.928,177.785,367.385,992.034
322,4fe670b5f4,2026-10-31,5969,json_view: decode chains of unicode escapes in a loop (#5969),1390.866,2466.769,6026.817,2328.995,1736.168,475.935,212.530,291.166,2284.708,418.661,1323.436,137.513,1495.099,1736.832,176.566,365.541,963.794
323,9c349b1d7c,2026-10-31,5964,Write integers of 17 to 20 digits eight digits at a time in dump() (#5964),1390.500,2469.332,6079.698,2359.276,1718.121,470.647,209.615,289.143,2300.836,419.976,1331.637,138.488,1450.106,1703.483,176.731,365.394,953.483
324,3fd3e0fdaa,2026-11-01,5908,json_view: dump and read canada.json-style floats faster (batched float decisions) (#5908),1366.359,2456.409,6058.422,2329.066,1713.347,470.784,209.895,289.318,2294.111,417.490,1319.403,138.100,1435.053,1698.647,176.006,363.191,954.196
325,76001c6b4c,2026-11-01,5968,"BSON reader: find C-string terminators 8 bytes at a time, skip array element names (#5968)",1408.222,2488.159,6124.287,2363.039,1759.751,477.558,216.880,294.011,2317.898,420.892,1345.718,138.602,1460.432,1713.978,179.721,370.205,970.525
326,1a018577cc,2026-11-01,5970,json_view: accept() checks the text without writing an index (#5970),1427.279,2506.345,6160.916,2368.009,1765.595,480.552,214.060,293.093,2341.368,419.303,1330.990,138.625,1463.731,1724.021,181.150,373.171,964.666
327,162eda2574,2026-11-01,5971,json_view: skip the digits of a fraction 16 bytes at a time (SSE2) (#5971),1404.191,2474.144,6049.006,2363.726,1711.013,471.608,211.613,289.736,2290.230,418.673,1322.822,138.556,1441.219,1697.559,178.814,370.881,956.959
328,6c3ab966d3,2026-11-01,5975,CBOR reader: read runs of scalar array elements in one loop (#5975),1385.800,2466.923,6050.480,2325.901,1725.552,474.248,210.034,289.350,2296.399,418.689,1327.626,137.722,1440.577,1698.622,178.627,367.797,953.174
329,aecbef3949,2026-11-01,5976,Binary readers: swap the bytes of floats with a single byteswap (#5976),1393.659,2479.298,6092.110,2337.421,1718.218,472.539,211.337,289.638,2307.378,417.589,1324.038,137.341,1447.860,1701.387,179.160,369.448,956.324
330,edf8d17601,2026-11-01,5980,MessagePack reader: read runs of scalar array elements in one loop (#5980),1422.081,2486.171,6157.302,2360.678,1733.503,477.472,211.189,289.309,2307.724,419.448,1334.857,138.914,1449.345,1721.126,180.127,369.693,967.370
331,fb515ddc34,2026-11-01,5981,UBJSON/BJData readers: read optimized arrays of numbers in one loop (#5981),1387.633,2470.528,6067.657,2345.342,1721.303,476.141,212.198,288.466,2292.649,416.597,1324.486,139.598,1441.019,1705.957,179.190,367.903,959.677
332,517444b504,2026-11-01,5978,accept() checks strings without copying them (#5978),1385.026,2453.809,5975.744,2322.357,1711.222,475.186,210.256,288.348,2282.444,415.256,1321.012,138.726,1434.772,1698.120,178.106,365.411,976.135
333,9742edc294,2026-11-01,5979,"BSON writer: write to_bson(j) in one pass, with sizes written afterwards (#5979)",1418.816,2514.802,6091.854,2380.269,1772.646,474.067,211.598,290.653,2316.886,421.043,1346.324,139.213,1469.659,1754.493,180.269,372.201,982.753
334,f022e3c59c,2026-11-01,5982,Binary readers and writers: faster UTF-8 checks of strings (#5982),1399.836,2474.703,6060.781,2341.409,1707.583,468.692,209.824,290.357,2290.034,418.739,1312.448,138.360,1458.779,1707.575,178.911,369.303,968.200
335,ddc34f546a,2026-11-01,5974,json_view: exceptions name the path and the bytes of the value (#5974),1394.263,2489.906,6017.599,2345.632,1728.593,473.672,210.364,289.980,2306.608,420.394,1327.301,138.827,1448.846,1707.037,177.406,368.436,978.755
336,b2674a4a2f,2026-11-01,5984,BSON reader: check array element names in place in strict mode (#5984),1392.028,2460.989,5975.355,2357.154,1726.291,472.389,209.872,289.219,2301.092,417.632,1309.441,138.779,1438.270,1709.943,177.580,366.368,973.214
337,76dbe8f9c9,2026-11-02,6009,"Fix the red CI on develop: Visual Studio 2017 build of the BSON writer, Valgrind timeouts (#6009)",1387.812,2461.244,5975.843,2323.693,1713.572,469.489,209.863,289.058,2291.892,415.935,1306.729,138.322,1447.714,1694.220,177.698,363.994,972.289
338,03d408aafa,2026-11-02,6003,JSON_DIAGNOSTIC_POSITIONS: comparing a value-initialized iterator throws instead of crashing (#6003),1385.014,2455.146,5981.995,2380.493,1732.039,466.575,209.272,289.474,2295.226,416.844,1301.454,138.016,1445.840,1703.494,176.691,365.416,967.929
339,66e2eeeec0,2026-11-02,6000,Do not construct the base class when destroying a container (#6000),1403.795,2457.426,6001.495,2323.510,1718.268,471.022,210.474,288.385,2308.462,417.187,1313.263,138.770,1437.867,1705.586,179.168,363.523,966.701
340,bdc737db6d,2026-11-02,5999,json_view: dump() without StringType::capacity() (#5999),1378.656,2452.954,6020.464,2339.908,1724.630,470.774,211.638,288.939,2303.773,418.311,1312.024,139.010,1446.709,1704.406,177.291,363.859,966.602
341,494a74c242,2026-11-02,5996,"insert(): strong guarantee for single elements, basic guarantee for the rest (#5996)",1390.153,2478.991,6032.084,2342.171,1727.040,469.799,213.660,291.104,2307.193,419.623,1329.285,139.000,1461.294,1718.750,178.995,366.898,974.652
342,bfe69c73c2,2026-11-02,5992,"json_view: get<T>() of a boolean throws for the exact number types, as basic_json does (#5992)",1387.497,2452.207,6023.042,2335.261,1720.938,471.966,212.162,288.851,2310.949,417.260,1315.155,137.821,1448.762,1710.153,175.990,366.239,970.052
343,ff0bdfdef3,2026-11-02,5990,Keep the byte range in exceptions about the root value (#5990),1386.358,2469.197,6037.812,2344.775,1768.382,479.285,214.375,290.939,2329.486,421.838,1332.654,138.666,1455.905,1720.376,178.637,368.500,972.955
344,1d69ef9ab4,2026-11-02,5997,"Raise line coverage to 99.9 %: fix the measurement, remove unreachable code, add tests (#5997)",1404.481,2456.447,6166.942,2338.226,1749.981,478.338,211.609,289.387,2304.532,419.095,1321.195,140.055,1460.574,1706.842,179.067,369.688,982.029
345,5c4f585ac2,2026-11-02,6004,"Lexer, parser, stream adapter, SAX: remove checks that invariants make dead (#6004)",1386.586,2468.772,6188.662,2373.328,1775.098,483.139,211.476,291.250,2315.874,420.854,1321.718,138.268,1464.254,1709.146,180.316,367.994,965.010
346,100f676b3e,2026-11-02,6012,Restore the two commits of #6005 that the stack merge dropped (fixes the build of develop) (#6012),1369.597,2437.356,6122.282,2305.291,1691.485,472.217,208.716,288.666,2291.034,416.120,1300.906,137.896,1439.300,1688.769,176.641,366.389,972.368
347,590b622d48,2026-11-02,5991,parse(): propagate std::bad_alloc instead of crashing on a half-constructed member (#5991),1377.480,2425.219,6113.438,2306.435,1716.697,474.315,209.052,288.883,2292.776,417.291,1305.336,137.989,1453.044,1704.638,179.096,368.072,978.198
348,6d5581c4e8,2026-11-02,6008,CBOR/MessagePack readers: leave one-element arrays to the general path (#6008),1400.456,2439.163,6140.448,2328.635,1743.039,480.725,212.470,295.268,2348.332,427.202,1340.319,139.121,1489.584,1736.380,184.949,371.567,995.731
349,b18b6fc7e6,2026-11-02,6013,Build the parser's syntax error prefix with one concat() (#6013),1370.175,2435.337,6098.834,2320.728,1726.256,472.914,210.817,289.786,2292.841,419.186,1306.593,139.277,1481.709,1714.543,177.065,366.270,971.330
350,07876e2292,2026-11-02,6015,json_view: a value that is not found has no bytes in its exception context (#6015),1361.297,2435.980,6080.718,2305.853,1707.733,474.621,210.382,291.568,2337.276,424.783,1329.556,139.590,1450.506,1690.804,178.472,366.370,977.807
351,baba5db36f,2026-11-02,6016,"Fix the MSVC and GCC builds of develop (C4127, -Weffc++) (#6016)",1381.280,2440.908,6116.068,2303.611,1713.472,476.121,210.492,290.105,2319.878,420.598,1318.037,139.554,1471.388,1729.097,177.078,369.621,959.145
352,57b898ef99,2026-11-03,5998,Replace a multibyte decimal point in dump() of a long double (#5998),1376.416,2456.476,6107.073,2325.534,1714.240,471.800,213.484,290.901,2288.426,420.062,1304.744,139.492,1441.231,1696.537,176.981,363.955,944.685
353,efc437ef6e,2026-11-04,6002,UBJSON/BJData/MessagePack reader: reject a container count equal to SIZE_MAX (#6002),1376.138,2441.279,6136.755,2331.556,1708.185,467.554,210.231,291.606,2314.834,415.023,1321.171,138.603,1456.238,1718.533,176.858,366.713,938.783
354,42825fba07,2026-11-04,6020,Binary writers: zero only a window ahead of the vector sink's position (#6020),1391.971,2460.961,6101.484,2312.584,1736.846,484.624,211.385,289.579,2309.943,416.103,1316.307,138.308,1464.425,1715.552,179.565,367.624,969.541
355,1da8735154,2026-11-04,6023,Fix leak and crash when an allocation throws during parsing (#6023),1358.000,2456.832,6148.140,2333.761,1752.168,487.998,213.374,290.735,2324.377,420.402,1316.165,139.748,1460.000,1714.216,179.958,367.953,970.615
356,e48800f09d,2026-11-04,6001,Binary reader and writer: remove checks that invariants make dead (#6001),1371.292,2434.395,6104.099,2313.769,1711.288,483.297,211.214,288.130,2308.992,416.639,1300.966,138.719,1455.595,1695.539,180.445,370.313,962.574
357,951271127b,2026-11-07,6028,Binary readers: append strings straight from contiguous input (#6028),1381.807,2431.713,6099.235,2311.519,1694.104,464.615,207.900,288.438,2322.463,418.952,1227.851,138.811,1468.723,1706.816,177.249,369.912,975.798
358,18138227dc,2026-11-07,6030,Scan the buffer of a FILE in bulk with glibc and the Apple C library (#6030),1379.500,2439.343,6147.771,2308.199,1689.427,482.217,213.967,290.466,2309.747,420.209,1239.525,139.367,1443.438,1731.583,180.401,364.380,975.476
359,candidate,,,develop + open pull requests,1230.726,2155.896,5188.718,2038.886,1713.280,234.359,212.584,289.591,2313.669,425.788,1234.309,137.017,1444.999,1699.919,179.250,367.586,954.772
1 index commit date pr subject parse_twitter parse_citm parse_canada parse_citm_compact parse_twitter_ifstream accept_twitter dump_twitter dump_citm dump_canada dump4_citm from_cbor_twitter to_cbor_twitter copy_destroy_citm equal_citm view_parse_twitter view_parse_citm view_parse_canada
2 0 55f93686c0 2025-04-11 Merge branch 'release/3.12.0' 3571.487 8219.609 17049.073 4366.792 3846.006 2394.213 1441.213 1375.446 7510.989 1917.809 3463.281 695.524 1643.327 1956.891
3 1 1705bfe914 2025-04-11 4727 :bookmark: set version to 3.12.0 (#4727) 3589.331 8245.422 17079.250 4422.711 3894.787 2397.597 1440.546 1377.745 7514.698 1922.371 3498.997 695.559 1655.240 1967.301
4 2 4cca3b9cb2 2025-04-13 4738 Fix warning and add emscripten CI step (#4738) 3559.657 8195.105 17066.291 4373.011 3794.269 2388.900 1419.182 1355.724 7420.703 1912.038 3468.667 664.214 1631.610 1939.475
5 3 96c1b52f1c 2025-04-15 4742 Fix conversion to std::optional (#4742) 3573.838 8157.276 16993.208 4383.656 3858.927 2395.092 1438.169 1372.208 7497.776 1925.481 3482.185 667.895 1633.619 1946.687
6 4 88c92e605c 2025-04-16 4744 Fix compilation failure and warnings with NVHPC (#4744) 3563.149 8039.911 16922.739 4381.927 3768.560 2385.086 1407.564 1345.578 7370.063 1897.474 3462.010 662.955 1623.286 1925.804
7 5 c67d538274 2025-04-17 4749 Fix C4702 warning and extend MSVC CI job (#4749) 3585.422 8251.057 17050.448 4400.542 3896.586 2390.655 1440.391 1371.722 7453.474 1921.277 3478.523 667.911 1636.206 1939.531
8 6 756ca22ec5 2025-04-23 4736 Provide fallback for missing `char8_t` support (#4736) 3559.146 8139.703 17085.114 4387.658 3856.745 2392.849 1424.997 1370.599 7477.537 1907.661 3484.427 665.541 1634.156 1957.401
9 7 6b9199382b 2025-04-27 4763 Add missing header (#4763) 3541.323 8077.761 17011.636 4359.183 3842.380 2396.686 1421.116 1363.737 7431.375 1902.909 3474.250 664.442 1625.644 1934.732
10 8 3b02afb9d9 2025-04-28 4760 Specialize char_traits for std::byte to fix from_msgpack (fixes #4756) (#4760) 3583.070 8198.146 17134.698 4381.743 3899.872 2409.185 1440.233 1380.810 7504.838 1921.781 3500.125 666.078 1657.207 1966.036
11 9 eef76c200e 2025-04-28 4764 Make library work with C++20 modules (#4764) 3528.529 8080.458 16936.656 4330.570 3764.287 2363.848 1407.851 1358.079 7356.239 1897.423 3455.287 665.194 1632.255 1937.675
12 10 dff2b4756c 2025-04-29 4765 fix: BJData size calculation overflow (#4765) 3553.706 8141.375 17047.511 4360.144 3797.070 2389.756 1417.737 1364.718 7454.313 1921.962 3479.878 666.456 1644.760 1944.696
13 11 9110918cf8 2025-05-04 4748 Fix typos (#4748) 3563.682 8176.427 17239.354 4398.055 3891.669 2399.782 1441.669 1387.133 7516.073 1925.323 3483.271 669.348 1647.760 1957.747
14 12 46e7cd3dc2 2025-05-16 4775 Replace deprecated std::is_trivial in C++26 (#4775) 3565.242 8195.396 17135.646 4373.479 3851.604 2392.258 1418.425 1370.958 7464.854 1909.844 3485.046 665.606 1643.155 1952.329
15 13 828c891427 2025-05-16 4786 Extend type_name() to invalid type (#4786) 3549.573 8103.761 17066.198 4359.911 3804.849 2389.121 1428.584 1366.405 7424.838 1914.434 3452.497 667.452 1632.750 1928.324
16 14 4b17f90f65 2025-05-22 4609 Add `ignore_trailing_commas` option (#4609) 3544.662 8132.052 16997.375 4344.592 3825.765 2382.755 1408.435 1367.468 7460.448 1924.522 3434.062 733.089 1631.356 1891.572
17 15 b19f058465 2025-06-01 4802 Encode infinity and NaN as float for MsgPack and CBOR (#4802) 3550.020 8126.438 17350.885 4327.596 3825.419 2389.356 1409.422 1376.649 7363.802 1921.226 3441.081 683.190 1624.144 1886.388
18 16 cf16c5ab9f 2025-06-02 4805 Use binary_t::value_type (#4805) 3551.735 8143.521 17153.291 4309.477 3829.229 2387.640 1428.550 1385.585 7415.271 1932.347 3425.838 657.735 1631.586 1888.954
19 17 d70e46bc65 2025-06-25 4830 :bug: add missing header to input_adapters.hpp (#4830) 3546.448 8157.469 17062.364 4335.300 3805.221 2382.796 1422.863 1382.581 7411.401 1928.676 3433.190 691.842 1632.972 1892.453
20 18 30d27df61c 2025-07-31 4871 Fix CI (#4871) 3570.015 8150.859 17070.625 4330.078 3806.505 2400.329 1434.947 1381.065 7425.718 1931.556 3429.632 656.545 1633.515 1892.916
21 19 efcf9efb4f 2025-08-02 4873 Fixes #4854 Explicitly handle nullptr in sax_parse (#4873) 3520.381 8050.719 16883.042 4331.820 3861.906 2368.069 1408.435 1375.954 7363.651 1898.466 3432.992 653.988 1634.141 1894.948
22 20 4106af8d92 2025-08-20 4896 :rotating_light: suppress cppcoreguidelines-c-copy-assignment-signature,misc-unconventional-assign-operator (#4896) 3540.599 8175.265 17010.438 4345.182 3866.833 2393.935 1435.100 1389.496 7453.724 1945.791 3433.169 657.446 1638.434 1900.360
23 21 a63795caf1 2025-10-22 4791 :rotating_light: avoid deprecation warning (#4791) 3550.057 8174.646 16983.177 4363.521 3888.336 2393.305 1423.434 1376.334 7469.407 1936.013 3447.279 666.706 1645.354 1903.707
24 22 1cc56b2dcd 2025-10-23 4957 Address CWG issue 2521 (#4957) 3557.396 8119.651 17072.730 4351.881 3834.739 2386.097 1442.100 1393.245 7474.463 1932.315 3446.883 660.187 1638.983 1896.000
25 23 54be9b04f0 2025-10-23 4960 :page_facing_up: update REUSE (#4960) 3554.625 8098.287 17115.219 4324.578 3809.950 2390.791 1424.488 1376.715 7422.828 1913.208 3424.693 659.030 1623.405 1892.756
26 24 29913ca760 2025-10-25 4963 Add char8_t* overload for _json and _json_pointer (#4963) 3544.899 8169.203 17007.844 4353.594 3797.630 2392.108 1423.032 1375.216 7349.787 1909.897 3428.771 655.625 1635.273 1891.018
27 25 515d994acb 2026-01-01 5044 :page_facing_up: adjust year (#5044) 3524.610 8059.521 16949.416 4313.508 3773.750 2364.742 1410.427 1372.988 7382.438 1915.502 3403.159 643.968 1618.972 1884.213
28 26 8f75700141 2026-01-11 4958 support types convertible to string_view as JSON keys (#4958) 3546.757 8142.599 17103.386 4327.739 3825.990 2388.540 1420.515 1379.309 7413.062 1924.540 3433.677 658.266 1628.079 1890.759
29 27 457bc283ff 2026-01-12 5039 fix(cbor): reject overflowing negative integers (#5039) 3508.883 8077.291 16930.011 4305.982 3785.698 2378.693 1425.526 1366.111 7407.042 1929.142 3478.909 657.722 1636.304 1944.681
30 28 e3014f162a 2026-01-13 5052 Fix conversion to std::optional (#5052) 3547.995 8140.052 17010.031 4321.914 3797.807 2385.856 1430.414 1386.202 7407.260 1930.403 3462.213 657.829 1629.579 1932.066
31 29 5ed07097fa 2026-01-13 5050 Fix -Wtautological-constant-out-of-range-compare in serializer (#5050) 3544.136 8180.208 17033.209 4339.591 3799.779 2391.940 1427.870 1387.871 7368.765 1922.321 3454.938 659.367 1630.707 1959.722
32 30 25f48639c7 2026-01-23 5016 Reference tuple from json (#5016) 3563.180 8209.037 17030.969 4388.675 3895.086 2392.088 1430.666 1393.853 7528.567 1934.347 3481.351 677.234 1645.418 1957.591
33 31 f8eee1bb79 2026-02-07 5071 Annotate unreachable comment-scanner switch paths to satisfy C26819 (#5071) 3508.000 8128.750 16958.959 4315.235 3797.237 2371.963 1425.146 1374.867 7453.381 1930.211 3456.508 658.568 1629.188 1909.736
34 32 fd17b0889e 2026-05-08 5139 Remove nullptr safety check from sax_parse functions (#5139) 3544.101 8033.021 16963.292 4334.102 3800.736 2382.583 1419.050 1361.745 7357.073 1907.153 3429.315 657.041 1618.815 1937.829
35 33 62f3b41b30 2026-05-08 5090 fix: treat single-element brace-init as copy/move instead of wrapping in array (#5074) (#5090) 3550.323 8168.713 17060.031 4349.417 3794.110 2380.583 1416.822 1361.182 7369.651 1897.717 3466.731 659.297 1631.463 1941.905
36 34 4fad446897 2026-05-10 5162 docs: add IDs to @requirement tags to fix Doxygen autolinking (#5162) 3545.440 8031.891 17069.448 4324.698 3802.862 2383.513 1422.768 1384.602 7325.776 1917.606 3469.787 659.011 1631.296 1940.370
37 35 a0a4e7cc0b 2026-05-13 5152 Add front methods to json_pointers (implements #4889) (#5152) 3582.898 8215.010 17034.448 4345.515 3891.513 2396.572 1432.733 1395.714 7554.119 1934.008 3484.859 659.298 1642.314 1957.356
38 36 93e49decbd 2026-05-14 5167 Fix incomplete-type error in set_parents with ordered_json (#5167) 3555.224 8147.771 17017.073 4320.846 3831.318 2386.750 1435.840 1385.578 7436.864 1927.483 3466.508 658.409 1632.724 1939.528
39 37 7192763f15 2026-05-14 5163 Fix compile error when using nlohmann ordered_map with WITH_DEFAULT macros (#5163) 3520.675 8039.145 16892.291 4303.448 3769.198 2363.337 1410.030 1364.679 7380.797 1913.285 3437.278 660.130 1630.738 1943.235
40 38 5a05627b1f 2026-05-14 5169 :rotating_light: fix warning (#5169) 3600.555 8160.854 16979.031 4324.070 3887.823 2389.157 1430.983 1387.106 7509.984 1912.601 3473.713 663.279 1652.982 1958.774
41 39 bb5404bb86 2026-05-15 5164 Fix GCC C++20 modules compilation #5103 (#5164) 3543.823 8120.266 17015.395 4349.300 3794.880 2364.178 1414.408 1374.548 7484.218 1920.495 3444.266 699.326 1626.241 1954.688
42 40 b1bb9fce0c 2026-05-15 3929 Fix for printing long doubles bug in dump_float (#3929) 3549.378 8089.891 16934.927 4313.310 3824.802 2386.958 1412.164 1385.425 7417.869 1930.513 3461.151 651.557 1618.735 1944.450
43 41 cba5dc0ed8 2026-05-16 4563 New macros for the named JSON convertor generation (#4563) 3544.657 8168.182 16990.886 4327.688 3806.963 2370.975 1421.629 1390.206 7454.151 1919.284 3452.456 677.413 1623.622 1941.921
44 42 47202c804a 2026-05-18 5171 Add missing overload to ordered_map::find (#5171) 3527.542 8168.312 17141.989 4409.456 3887.378 2397.007 1428.765 1387.033 7495.604 1935.710 3485.088 660.155 1648.977 1951.430
45 43 58cfecf7f7 2026-05-18 5151 Serialize enum (#5151) 3521.302 8100.104 16805.489 4288.463 3763.971 2381.494 1408.713 1383.059 7328.261 1915.202 3440.372 648.726 1617.661 1922.608
46 44 584e6b1cfb 2026-05-22 5187 Fix: update() parent pointers not updated after recursive merge with JSON_DIAGNOSTICS (#5187) 3550.639 8083.463 17055.198 4326.833 3804.257 2381.519 1432.039 1381.986 7377.844 1915.159 3460.750 656.873 1631.527 1940.953
47 45 02dfbea39d 2026-06-17 5209 added explicit instantiations of 'has_from_json' and 'has_to_json' for std_fs::path (#5209) 3552.209 8215.474 17167.760 4338.404 3845.144 2398.026 1425.012 1387.629 7458.614 1931.388 3475.343 658.183 1644.329 1958.324
48 46 fc1df0b7db 2026-06-23 5172 :recycle: remove unnecessary if (#5172) 3562.088 8175.531 17044.042 4336.583 3863.651 2404.695 1425.872 1389.434 7523.855 1914.128 3481.000 653.259 1639.515 1957.649
49 47 c5b2b26fdc 2026-06-29 5217 :memo: fix docs (#5217) 3526.825 8052.307 17000.011 4343.963 3793.412 2388.194 1416.706 1374.177 7361.646 1904.008 3463.919 658.322 1627.765 1921.887
50 48 b7566c6293 2026-06-30 5161 Harden JSON_HAS_RANGES detection for incomplete C++20 ranges implementations (#5161) 3538.995 8071.787 17120.751 4318.797 3772.445 2384.008 1421.440 1385.239 7419.292 1898.929 3431.466 647.948 1602.258 1928.644
51 49 adf78d3a76 2026-06-30 5215 Minor: unique_ptr template resolution workaround for MSVC (#5215) 3550.380 8138.026 17036.802 4366.062 3842.430 2389.536 1426.658 1385.609 7428.787 1915.233 3467.188 658.332 1636.158 1942.556
52 50 272411c5e6 2026-06-30 5218 Overwork project infrastructure (#5218) 3547.487 8087.250 16962.198 4341.969 3793.831 2387.509 1420.888 1381.072 7450.078 1930.003 3466.193 659.676 1631.329 1943.043
53 51 730b57775d 2026-07-01 5222 :bug: avoid assertion in patch (#5222) 3539.912 8169.771 17027.229 4345.151 3790.753 2376.552 1421.263 1386.717 7399.985 1923.237 3455.722 653.609 1630.914 1934.028
54 52 ca49ab6123 2026-07-02 5223 Extend value to arrays when using JSON pointers (#5223) 3550.341 8113.787 16951.313 4346.805 3793.097 2391.224 1409.695 1380.075 7374.073 1926.401 3458.438 659.382 1629.387 1941.306
55 53 8d7e0046f4 2026-07-02 5224 Add std::format and fmt support (#5224) 3546.935 8170.406 16968.927 4346.906 3814.956 2387.612 1424.861 1386.542 7350.765 1900.376 3461.177 662.476 1633.858 1930.434
56 54 31dd15b258 2026-07-02 5221 Fix ambiguous static_cast (#5221) 3551.945 8213.000 17131.271 4373.620 3845.763 2393.074 1438.633 1385.769 7471.146 1927.804 3486.568 662.015 1631.810 1958.901
57 55 eed1587000 2026-07-05 5234 Reconstruct lexer diagnostics lazily for seekable input (#120) (#5234) 3145.909 5311.094 15381.843 4292.961 3851.260 1966.833 1422.598 1365.461 7443.276 1920.467 3467.060 702.832 1637.587 1905.758
58 56 83c87cb9e0 2026-07-05 5233 Read binary strings/blobs in bulk chunks with a memcpy fast path (#5233) 3141.867 5259.485 15454.959 4326.664 3797.198 1987.623 1406.492 1372.765 7424.729 1899.726 2363.895 667.502 1630.097 1888.392
59 57 acf076a677 2026-07-06 5238 Fix ADL leak of nlohmann::detail through basic_json's default base class (#5238) 3152.153 5277.073 15291.407 4338.828 3839.331 1995.524 1429.960 1365.917 7456.776 1907.928 2398.016 670.257 1627.590 1897.997
60 58 c05c5e229b 2026-07-07 5241 Add missing copyright notices to SBOM (#5241) 3147.485 5268.865 15319.584 4321.823 3796.972 1981.167 1432.689 1371.264 7465.416 1918.083 2388.154 667.119 1630.745 1891.583
61 59 366f3d26e5 2026-07-08 5235 Replace snprintf with a branch-free writer for \uXXXX escapes (#5235) 3127.641 5272.302 15425.239 4340.459 3850.357 1997.957 1459.603 1356.461 7509.703 1899.916 2366.966 668.383 1624.981 1889.145
62 60 f8e99e856c 2026-07-09 5248 Fix nvcc CUDA 12.0/12.1 C++20 ranges parse error (#3907) (#5248) 3132.099 5226.375 15164.510 4301.901 3769.651 1967.647 1456.759 1365.810 7530.724 1908.635 2381.610 683.815 1616.699 1879.795
63 61 855f511db4 2026-07-09 5250 Fix stale Clang -Weverything suppression comments; drop -Wno-missing-noreturn (#5250) 3126.792 5208.338 15352.520 4293.596 3800.544 1969.497 1458.601 1329.851 7372.849 1876.404 2368.894 662.173 1603.881 1874.673
64 62 d0a43141ea 2026-07-09 5253 Fix #3868: Remove operator!= to enable P2468R2 rewritten candidate synthesis (#5253) 3165.182 5270.458 15479.031 4302.729 3845.646 1989.231 1474.135 1343.312 7443.282 1887.909 2392.523 670.395 1634.871 1894.474
65 63 b630f5e9c7 2026-07-10 5260 Fix container input_adapter SFINAE for lvalue-only ADL begin/end (#5260) 3128.117 5263.807 15375.677 4330.544 3819.953 1982.196 1454.088 1339.062 7364.683 1877.699 2361.482 666.486 1616.514 1920.626
66 64 c60217e801 2026-07-11 5205 fix: support constructing json from C++20 range views (#4916) (#5205) 3117.539 5206.552 15308.166 4320.513 3798.713 1983.458 1447.072 1350.950 7357.213 1875.632 2340.731 662.905 1633.357 1934.261
67 65 fe2bcc080f 2026-07-11 5266 Custom BinaryType direct assignment (#5266) 3174.528 5284.562 15383.645 4328.120 3895.086 1996.913 1478.427 1355.569 7512.115 1899.236 2398.490 672.118 1642.910 1967.660
68 66 ca76c37650 2026-07-11 5265 Add iterator+sentinel tests and docs for binary deserializers (#5265) 3134.265 5218.021 15352.521 4306.284 3791.612 1967.824 1451.953 1358.685 7508.828 1891.697 2377.848 665.474 1631.495 1934.907
69 67 c197feff81 2026-07-12 5268 Extend memcpy fast path to sized sentinels (e.g. std::counted_iterator) (#5268) 3116.271 5207.146 15415.771 4272.443 3815.851 1984.966 1451.103 1341.093 7328.037 1865.385 2383.169 664.494 1617.967 1915.428
70 68 1c5a953de5 2026-07-19 5276 reject unpaired UTF-16 surrogates in wide-string input (#5276) 3155.360 5299.631 15419.812 4302.089 3853.104 1987.259 1468.653 1349.665 7549.432 1911.365 2457.555 680.311 1653.282 1955.673
71 69 3565f40229 2026-07-20 5284 reject negative UBJSON/BJData string length (#5284) 3170.456 5301.698 15404.416 4351.226 3893.594 1997.034 1470.907 1358.245 7491.480 1909.601 2401.384 671.260 1639.865 1963.899
72 70 9a3ebb9456 2026-07-23 5287 validate BSON document size against the bytes read (#5287) 3157.646 5264.062 15305.271 4338.672 3839.643 1987.196 1461.356 1351.630 7444.791 1890.626 2398.503 665.262 1655.798 1930.268
73 71 8ec98e2c9e 2026-07-27 5313 adding cleanups to bson writer (#5313) 3150.448 5268.948 15445.927 4308.612 3805.005 1989.643 1466.348 1349.591 7326.453 1895.842 2393.278 708.164 1644.025 1946.652
74 72 2e23687092 2026-07-28 5314 to_bson() silently emits corrupt documents when a length exceeds INT32_MAX (#5314) 3146.534 5254.547 15445.250 4304.008 3798.620 1986.260 1459.735 1345.534 7517.651 1903.996 2395.155 674.344 1644.565 1952.682
75 73 868506dcc0 2026-07-30 5335 Fix CBOR half-float assertion bounds (#5335) 3167.086 5267.068 15397.979 4351.011 3883.135 2003.345 1468.939 1360.483 7455.230 1909.055 2406.305 679.942 1643.646 1945.639
76 74 dd24e2dffd 2026-07-30 5332 check all BSON reads and add an EOF check for booleans (#5332) 3138.315 5284.833 15399.166 4310.513 3847.630 1980.682 1464.104 1344.108 7445.146 1901.512 2400.532 670.850 1635.196 1900.946
77 75 fd72ecfc8c 2026-07-31 5301 validate ndarray element types in write_bjdata_ndarray (#5301) 3164.662 5262.141 15399.010 4287.271 3849.318 1988.186 1460.688 1353.767 7458.380 1893.669 2398.485 668.466 1644.018 1921.615
78 76 bc48951128 2026-07-31 5323 Fix UBJSON high-precision floating-point overflow handling (#5323) 3155.628 5289.864 15474.375 4324.253 3888.966 2015.068 1477.846 1354.622 7480.730 1905.566 2415.428 668.997 1641.776 1911.819
79 77 d94cbd99dc 2026-07-31 5274 reject CBOR array/map length equal to the indefinite-length marker (#5274) 3144.041 5272.193 15466.980 4338.735 3848.849 1999.231 1459.129 1358.119 7507.307 1901.807 2394.972 667.016 1635.960 1899.878
80 78 2222d386c9 2026-07-31 5339 fix: check CBOR tagged subtype reads (#5339) 3095.768 5137.792 15064.146 4258.977 3755.229 1965.900 1454.890 1338.066 7399.068 1883.624 2358.193 660.190 1618.172 1939.713
81 79 585929bff9 2026-08-03 5289 Fix Clang deprecation warning for json_pointer operator== with ordered_json (#5289) 3142.341 5259.360 15258.271 4275.479 3807.672 1969.704 1453.688 1337.633 7451.037 1879.447 2364.966 661.560 1635.617 1945.709
82 80 5f121d8c50 2026-08-03 5336 avoid sign extension in char_traits<signed char>::to_int_type (#5336) 3145.000 5264.880 15441.521 4269.632 3796.781 1983.497 1440.810 1325.232 7427.750 1880.047 2361.899 663.772 1621.595 1912.378
83 81 68f0722a19 2026-08-03 5342 remove discarded array from parent object in end_array (#5342) 3161.273 5269.907 15312.469 4335.433 3840.510 1995.965 1465.745 1355.934 7474.901 1895.483 2401.197 657.397 1634.791 1901.902
84 82 dca9d49a33 2026-08-05 5348 reject out-of-range code points in UTF-32 wide-string input (#5348) 3119.753 5210.979 15209.260 4273.984 3799.034 1995.297 1459.456 1342.982 7431.646 1891.478 2370.364 653.618 1633.585 1882.753
85 83 9a091d2b82 2026-08-05 5362 Do not write BJData ndarrays whose size overflows std::size_t (#5362) 3137.381 5257.312 15286.084 4308.500 3805.325 1995.140 1468.138 1354.729 7510.088 1893.036 2384.577 659.394 1628.260 1890.245
86 84 d5647e6a3b 2026-08-05 5355 Resolve the TODO(niels) in get_ubjson_string (#5355) 3121.278 5249.927 15246.011 4292.737 3800.490 1967.087 1443.762 1333.226 7368.953 1862.131 2347.852 644.647 1623.909 1889.958
87 85 bacdabd176 2026-08-05 5361 Fix start_pos() for strings containing escape sequences (#5361) 3114.653 5251.619 15253.907 4331.818 3786.156 1960.676 1442.388 1330.247 7354.724 1863.306 2351.588 650.781 1623.543 1886.671
88 86 1c136a66c4 2026-08-06 5363 Move the CBOR doc block to the function it describes (#5363) 3124.274 5209.615 15411.897 4293.320 3812.156 1982.854 1457.653 1345.680 7422.343 1884.848 2387.050 656.076 1627.620 1878.737
89 87 6285225fd0 2026-08-12 5211 Fix integer comparison bug (#5211) 3159.557 5291.323 15395.395 4329.836 3867.200 1989.476 1456.052 1359.795 7526.860 1879.642 2396.137 659.077 1638.176 1900.416
90 88 b5378e8deb 2026-08-19 5331 Fix CBOR tag handlers not recognizing tags 0-5 and 21-23 (#5331) 3172.476 5239.812 15479.917 4295.539 3871.289 2003.439 1473.447 1343.742 7516.875 1888.412 2400.572 645.588 1641.621 1886.531
91 89 2f025f401e 2026-08-25 5380 Throw other_error.502 when UBJSON use_type is set without use_size (#5380) 3155.873 5190.312 15144.406 4286.388 3793.805 1968.199 1442.240 1340.929 7373.610 1860.543 2370.570 648.906 1631.207 1893.750
92 90 35705d79d8 2026-08-28 5414 Fix update(merge_objects=true) throwing on primitive-to-object merge (#5414) 3169.029 5252.578 15387.292 4340.690 3893.646 1979.616 1472.286 1361.543 7491.302 1903.909 2401.404 659.396 1641.697 1912.409
93 91 137a40b9aa 2026-09-05 5459 Compare integers with floats exactly instead of widening the integer (#5459) 3134.229 5259.349 15404.541 4300.146 3846.646 1992.155 1467.919 1351.774 7467.146 1887.255 2391.467 660.347 1631.735 1891.751
94 92 3c875683a5 2026-09-05 5461 Make diff() linear when an array shrinks (#5461) 3141.068 5259.000 15271.166 4319.659 3797.088 1983.450 1455.354 1354.676 7444.860 1891.687 2389.333 657.163 1632.998 1887.016
95 93 09b6b6b5ba 2026-09-05 5455 Fix to_bjdata() emitting unparsable output when _ArraySize_ is not an array (#5455) 3161.542 5253.047 15311.718 4291.388 3834.264 1992.744 1472.685 1357.680 7409.479 1889.287 2389.501 698.680 1628.237 1888.705
96 94 faa35cc647 2026-09-09 5484 Skip integer conversion in accept()/SAX validation when the value is unused (#5484) 3103.654 5222.453 15458.573 4215.765 3804.320 1935.161 1468.660 1353.499 7452.052 1883.191 2383.524 654.441 1631.700 1885.664
97 95 6d86cc0f6b 2026-09-09 5490 Speed up whitespace skipping in the lexer (#5490) 3181.328 5276.318 15307.312 4262.771 3877.401 1977.062 1465.196 1356.119 7594.177 1906.814 2388.615 684.926 1636.950 1893.526
98 96 c05347dd54 2026-09-09 5475 Undefine the four JSON_HEDLEY_* macros that leak after including json.hpp (#5475) 3147.932 5156.625 15347.990 4217.505 3871.812 1982.807 1458.787 1354.934 7639.328 1879.823 2370.342 674.625 1637.257 1903.903
99 97 d6660cf718 2026-09-09 5485 Route hand-rolled diagnostic pragmas through Hedley (#5485) 3116.151 5215.531 15257.499 4189.979 3835.023 1974.111 1459.363 1342.996 7553.802 1887.698 2379.999 669.934 1635.350 1877.492
100 98 c9477ccf91 2026-09-09 5496 Throw when JSON Patch remove's target path resolves through a primitive or null parent (#5496) 3138.841 5258.401 15315.417 4201.008 3874.682 1967.630 1446.393 1335.060 7542.708 1870.111 2390.141 668.484 1634.138 1886.981
101 99 8c38e270b5 2026-09-09 5497 Reject JSON Patch move when from is a proper prefix of path (#5497) 3183.820 5280.000 15346.969 4222.164 3839.596 1970.753 1470.428 1351.838 7515.344 1895.809 2389.731 673.696 1633.247 1889.546
102 100 a316738cfa 2026-09-09 5471 Add JSON_HEDLEY_WARN_UNUSED_RESULT to the current accept() overloads (#5471) 3175.891 5281.302 15397.062 4240.576 3934.333 1981.765 1475.890 1353.387 7625.104 1896.181 2401.097 669.729 1646.133 1895.638
103 101 c9f1d2d646 2026-09-09 5477 Broaden JSON_HEDLEY_WARN_UNUSED_RESULT coverage to pure query functions (#5477) 3171.706 5286.880 15430.844 4264.242 3880.943 1979.990 1472.289 1357.283 7569.854 1904.026 2407.487 671.673 1641.521 1889.053
104 102 8e26b9d4b3 2026-09-09 5495 Make contains(json_pointer) return false instead of throwing on unrepresentable array-index tokens (#5495) 3163.789 5240.755 15337.698 4226.154 3880.956 1971.912 1475.322 1357.125 7632.281 1904.060 2401.190 678.863 1638.371 1903.385
105 103 b17c272f46 2026-09-09 5472 Reserve capacity in from_json() object conversion when the target container supports it (#5472) 3152.899 5257.645 15401.000 4210.846 3885.123 1989.159 1476.637 1359.851 7639.396 1898.981 2408.243 670.075 1633.528 1894.086
106 104 3e2de32226 2026-09-10 5516 Remove unused iomanip include (#5516) 3141.349 5253.657 15364.074 4203.969 3847.620 1968.422 1455.035 1352.754 7582.494 1882.051 2371.814 663.504 1630.172 1870.223
107 105 d69fb8654d 2026-09-10 5501 Return the parsed value by move from from_cbor() and friends (#5501) 3133.485 5231.662 15309.926 4183.200 3835.662 1971.125 1462.447 1349.563 7479.136 1904.202 1595.991 661.519 1630.278 1883.994
108 106 4a93aa4e2f 2026-09-10 5283 Speed up parsing of contiguous input (numbers, strings, UTF-8) (#5283) 1963.879 4221.308 11609.531 3278.497 3857.880 927.779 1483.726 1357.793 7483.343 1906.916 1481.419 676.438 1643.746 1895.551
109 107 bfb07786cd 2026-09-10 5473 Fix to_bjdata() silently truncating out-of-range _ArrayData_ elements (#5473) 1941.894 4204.971 11726.688 3264.055 3808.784 923.797 1453.071 1351.760 7458.125 1891.470 1473.508 662.164 1633.043 1888.548
110 108 ff80ed3295 2026-09-11 5285 Speed up dump(), and keep it from overflowing the stack (#5285) 1939.289 4175.541 11781.291 3233.302 3816.101 914.071 441.200 540.473 6895.041 852.214 1478.197 656.635 1632.675 1885.303
111 109 da42a627dc 2026-09-11 5449 Stop dump() from heap-allocating its output adapter per call (#5449) 1937.658 4200.966 11639.198 3235.493 3827.695 909.901 448.948 537.008 6909.036 839.027 1479.968 659.210 1643.621 1878.065
112 110 1dc1d09fc6 2026-09-11 5457 Do not search a container for the value the callback rejected (#5457) 1937.459 4140.078 11576.803 3271.838 3845.193 924.316 450.148 539.031 6848.776 844.624 1470.333 671.563 1645.624 1900.347
113 111 fae364db24 2026-09-11 5458 Move the scanned string into the value instead of copying it (#5458) 1986.146 4110.787 11757.157 3150.932 3830.550 918.517 442.629 539.606 6913.104 843.920 1417.037 655.259 1628.224 1892.991
114 112 dd50f0eb16 2026-09-11 5502 Stop CBOR indefinite-length strings from recursing per chunk (#5502) 1987.853 4033.182 11613.834 3116.378 3841.164 915.943 442.366 539.480 6864.130 836.458 1431.035 656.146 1599.574 1885.858
115 113 4bb2de8cc5 2026-09-11 5503 Reject a nested BJData ndarray dimension vector where it is read (#5503) 1981.298 4086.276 11569.240 3141.539 3829.870 923.087 444.038 539.863 6800.724 835.434 1429.637 655.448 1628.999 1879.300
116 114 44f8ec30e9 2026-09-11 5504 Bound UBJSON optimized arrays of a valueless type (#5504) 2005.265 4092.265 11730.198 3130.635 3863.992 925.033 448.222 542.323 6893.078 849.901 1437.855 662.171 1638.306 1896.324
117 115 0dd8ca9023 2026-09-11 5505 Read MessagePack containers without recursing per nesting level (#5505) 2019.983 4105.305 11862.979 3142.581 3891.601 927.092 447.942 543.936 6939.963 845.634 1442.889 656.578 1637.512 1897.815
118 116 91ab3e81f5 2026-09-11 5506 Read CBOR containers and tags without recursing per nesting level (#5506) 1986.334 4039.961 11554.094 3118.761 3783.101 912.504 440.410 534.894 6831.943 834.661 1439.061 655.287 1615.619 1869.912
119 117 a14619b354 2026-09-11 5507 Read UBJSON and BJData containers without recursing per nesting level (#5507) 2011.959 4095.868 11782.688 3135.264 3873.604 926.014 447.638 541.304 6905.838 846.051 1468.512 664.161 1629.083 1898.772
120 118 0452641c18 2026-09-11 5508 Read BSON documents without recursing per nesting level (#5508) 1974.160 4043.887 11662.938 3095.011 3832.744 916.007 439.914 534.149 6904.453 835.615 1450.792 648.298 1616.917 1874.133
121 119 aa391dc0a5 2026-09-11 5520 Fix two develop CI regressions: dump() nodiscard warning and binary-reader const-correctness (#5520) 2003.010 4068.010 11771.364 3137.266 3825.247 924.668 442.416 539.478 6847.083 841.996 1460.659 649.378 1633.738 1885.897
122 120 a50c2537eb 2026-09-12 5476 Reserve capped array capacity in json_sax_dom_parser::start_array() for definite-length binary arrays (#5476) 1986.488 4063.883 11588.333 3077.995 3827.479 908.419 440.959 539.114 6806.177 833.555 1452.851 662.422 1627.995 1915.388
123 121 c0b2878a44 2026-09-13 5493 Swap diagnostic positions in basic_json::swap() (#5493) 2010.881 4081.057 11734.730 3130.919 3882.258 925.490 450.092 542.953 6925.188 848.486 1480.051 698.636 1643.508 1933.941
124 122 1da2f68992 2026-09-14 5522 Only reserve array capacity if the array type supports it (#5522) 1972.122 4048.622 11775.062 3107.938 3803.528 909.385 441.204 535.885 6793.927 842.843 1446.330 658.787 1619.239 1899.164
125 123 6487678bc5 2026-09-15 5464 Fix swap(array_t&)/swap(object_t&) to update parent pointers under JSON_DIAGNOSTICS (#5464) 2023.028 4116.169 11737.438 3165.172 3893.266 924.912 448.959 541.529 6970.438 852.039 1483.231 689.631 1635.240 1937.356
126 124 c72f37a40d 2026-09-15 5443 Support custom object/array types and improve template parameter handling (#5443) 2001.617 4076.547 11666.583 3109.756 3918.206 923.197 450.592 542.266 6901.703 846.558 1468.284 660.116 1641.586 1905.840
127 125 502e9d66f6 2026-09-16 5479 Fix to_bjdata() emitting the Draft-3-only 'B' marker in default Draft-2 mode (#5479) 1970.935 4018.060 11445.500 3079.409 3809.050 910.459 444.217 539.291 6851.407 833.755 1444.697 698.040 1626.601 1889.024
128 126 c41152e620 2026-09-16 5494 Fall back to plain-object encoding when to_bjdata()'s _ArrayType_ annotation is not a string (#5494) 1979.481 4054.688 11734.292 3085.542 3819.351 916.992 445.126 539.870 6853.005 833.190 1457.166 665.391 1629.586 1888.734
129 127 e564136c22 2026-09-22 5465 Make diff() account for member order in ordered_json objects (#5465) 1970.519 4063.744 11605.198 3087.497 3848.867 915.695 447.051 539.711 6835.172 841.402 1452.004 664.560 1640.751 1890.473
130 128 e485441123 2026-09-22 5466 Restore a duplicate key's prior value when the callback rejects its new value (#5466) 2012.920 4099.265 11796.895 3156.818 3913.812 931.464 451.403 541.419 6981.041 846.536 1469.521 704.138 1633.327 1905.709
131 129 a2b19d6158 2026-09-22 5467 Honor allow_exceptions=false for excessive array/object size (out_of_range.408) (#5467) 1996.478 4084.422 11734.208 3129.099 3850.854 923.499 446.555 539.379 6949.427 842.029 1453.166 694.200 1631.133 1888.865
132 130 d2c1a6a272 2026-09-22 5468 Reject array insert(pos, first, last) iterators not pointing into an array (#5468) 1983.767 4066.651 11618.667 3128.505 3848.427 914.900 447.603 541.973 6915.265 844.307 1458.762 677.699 1638.789 1892.443
133 131 0b20b7e622 2026-09-22 5469 Reject MessagePack/BSON binary subtypes that don't fit their wire format (#5469) 2010.548 4097.476 11681.218 3121.010 3866.146 925.619 448.533 540.786 6957.000 843.349 1463.518 658.302 1630.857 1902.522
134 132 1054b2097e 2026-09-23 5286 Speed up binary writing: value-type output sink + byte-swap number encoding (#5286) 1989.739 4101.393 12034.438 3157.240 3853.987 910.115 449.084 555.970 6884.386 864.526 1471.905 656.635 1661.806 1926.233
135 133 ed513715a8 2026-09-24 5534 Document that a NUL byte in the input is treated as end of input (#5534) 2016.236 4104.763 11906.323 3141.138 3936.240 916.611 455.397 562.053 6987.917 871.110 1475.622 657.877 1676.934 1936.557
136 134 56b3ee566c 2026-09-24 5389 Fix stack overflow when copying a deeply nested value (#5387) (#5389) 1998.356 4051.206 11660.865 3101.107 3834.672 910.072 452.943 544.464 6908.974 849.212 1460.691 638.644 1650.749 1914.423
137 135 918da64657 2026-09-24 5542 Keep BJData ndarray annotations that would not survive a round trip as objects (#5542) 2003.009 4042.969 11517.375 3095.122 3815.360 908.444 448.415 539.423 6911.041 840.044 1449.543 671.530 1651.709 1908.408
138 136 8699de3064 2026-09-24 5555 Stop allocating the BJData excluded-marker list per container (#5555) 2001.718 4071.333 11686.427 3122.065 3796.757 900.895 447.123 539.918 6860.765 844.752 1444.435 646.608 1644.943 1879.295
139 137 2e91641de2 2026-09-24 5544 Test JSON_BRACE_INIT_COPY_SEMANTICS for real, and fix one-element tuples under it (#5544) 2004.785 4083.914 11662.270 3119.602 3917.914 922.465 454.869 547.631 6987.234 853.010 1469.612 649.946 1672.246 1913.098
140 138 7c90ec2323 2026-09-24 5546 Hash deeply nested values without recursing per nesting level (#5546) 1952.912 4071.159 11594.927 3117.497 3793.052 900.729 444.245 539.787 6854.406 841.264 1457.530 643.139 1638.578 1890.482
141 139 4daca40d7b 2026-09-24 5547 Merge deeply nested objects without recursing per nesting level (#5547) 2008.226 4104.399 11619.542 3148.604 3918.175 921.207 457.191 547.553 6942.265 855.352 1464.974 651.924 1665.232 1915.869
142 140 01b53c8c15 2026-09-25 5552 Keep JSON_DIAGNOSTICS parent pointers of ordered_json members after erase() and update() (#5552) 1979.354 4061.378 11603.480 3098.586 3875.258 919.125 455.911 546.269 6940.026 849.511 1461.751 648.841 1660.978 1917.254
143 141 abbe52d6de 2026-09-25 5344 Add JSON_PRECISE_STREAM_POSITION to leave the character that terminates a number in the stream (#5344) 2001.170 4081.617 11653.531 3131.331 3876.208 915.153 453.436 546.720 6971.864 848.900 1463.182 647.946 1662.943 1906.246
144 142 02dd3e67f2 2026-09-25 5390 Fix stack overflow and exponential runtime when comparing nested values (#5390) 1987.861 4074.039 11596.000 3161.284 3901.497 919.541 447.553 543.948 6910.162 845.668 1455.759 664.224 1652.074 1930.575
145 143 465407f3ce 2026-09-25 2818 Improve error message for const fields (#2818) 1975.274 4118.565 11863.448 3130.541 3880.764 910.767 452.904 545.363 6906.890 843.118 1459.728 645.770 1654.265 1934.900
146 144 632a5812a8 2026-09-25 5272 Support zero-member types in NLOHMANN_DEFINE_TYPE_* macros (#4041) (#5272) 1963.323 4021.526 11747.959 3102.006 3784.896 904.545 444.355 543.748 6840.604 841.416 1438.306 639.223 1649.816 1930.274
147 145 d19f7f5dce 2026-09-25 5185 Fix BSON conformance issue (#5185) 1958.606 4048.536 11541.011 3086.805 3817.875 900.452 446.001 544.071 6824.323 837.078 1971.245 641.271 1651.209 1934.647
148 146 c60a0bc336 2026-09-25 5573 Allocate the deep copy's key scratch space with the provided allocator (#5573) 1965.216 4021.459 11630.855 3074.078 3807.258 902.782 444.394 542.562 6919.969 840.942 1975.668 645.827 1637.429 1918.607
149 147 1e44262091 2026-09-25 5560 Make JSON_STRICT_NUL_HANDLING part of the ABI tag (#5560) 1961.862 4069.617 11594.083 3117.500 3817.758 909.186 448.820 544.420 6845.802 844.016 1977.909 645.864 1651.269 1937.217
150 148 95e9a5931c 2026-09-25 5553 Write BSON in linear time, without recursing per nesting level (#5553) 1965.832 4033.394 11589.364 3120.422 3792.091 905.110 446.984 543.328 6794.244 844.943 1991.659 640.188 1647.675 1928.562
151 149 fe4a544c7e 2026-09-27 5515 handled when size exceed uint32 (#5515) 1998.244 4047.208 11755.209 3091.776 3815.000 908.733 447.990 546.295 6903.084 850.946 1993.351 645.487 1654.343 1933.385
152 150 4fa95d9810 2026-09-27 5583 Remove unreachable branches from the binary writer (#5583) 1983.323 4038.331 11666.480 3092.841 3844.935 910.149 449.697 541.110 6840.583 830.604 1979.750 653.542 1650.670 1928.883
153 151 6178982b8d 2026-09-27 5582 Compare unordered objects by key below the nesting bound (#5582) 1971.706 4073.498 11600.646 3132.700 3830.323 910.231 448.982 538.812 6836.770 846.149 2007.607 657.180 1653.089 1934.675
154 152 f7972970a4 2026-09-27 5584 Throw instead of writing MessagePack lengths beyond UINT32_MAX (#5584) 1969.417 4013.021 11602.447 3083.552 3842.495 904.223 447.444 542.170 6862.735 839.628 2000.766 655.034 1653.006 1939.922
155 153 6bd106893a 2026-09-27 5559 Fix CBOR tag handling in cbor_tag_handler_t::store for non-binary items (#5559) 1969.250 4034.693 11691.500 3119.171 3827.860 916.053 455.026 542.577 6886.360 839.718 2012.919 653.031 1651.090 1931.698
156 154 1e101ecac1 2026-09-27 2998 Add BON8 support (#2998) 1975.804 4082.375 11658.542 3192.828 3758.141 907.029 444.920 556.470 6844.698 849.276 1977.153 649.181 1645.306 1920.836
157 155 9e1a09eec0 2026-09-28 5594 Name the key type when rejecting non-string CBOR/MessagePack map keys (#5594) 2006.582 4151.784 11788.532 3156.156 3845.052 915.647 454.027 557.846 6814.282 864.094 2021.072 654.095 1663.051 1947.078
158 156 fc03b9912e 2026-09-28 5597 Look up the locale decimal point at conversion time, not lexer construction (#5597) 2020.431 4172.916 12716.958 3196.958 3909.774 910.001 449.314 547.334 6900.968 852.306 2048.019 665.843 1696.937 1982.586
159 157 5b9ffae8bb 2026-09-30 5616 Move the float conversion chain out of the lexer (#5616) 1992.332 4167.328 12638.573 3212.515 3842.885 906.649 446.941 539.674 6952.672 839.042 2021.057 695.813 1684.689 1967.216
160 158 d268eaa693 2026-09-30 5617 Convert floats with Eisel-Lemire when std::from_chars is unavailable (#5617) 1987.608 4086.125 11507.062 3170.013 3830.425 898.856 445.077 542.854 6919.568 839.210 2021.918 666.925 1701.466 1951.211
161 159 65af260117 2026-09-30 5609 Move instead of deep-copy ordered_json values when an object grows (#5609) 1998.981 4134.057 11592.855 3192.779 3863.005 904.702 446.575 539.685 6850.886 840.845 2035.646 680.331 1682.755 1968.744
162 160 6a8a7735ed 2026-09-30 5614 Do not throw in contains() for an empty array reference token (#5614) 2008.447 4144.024 11612.176 3165.468 3842.060 905.045 443.941 539.755 6846.042 846.248 1998.713 669.752 1684.717 1953.487
163 161 0050d0f7a4 2026-09-30 5637 Share one nesting depth limit between all bounded descents (#5637) 2021.078 4170.581 11589.886 3224.963 3937.021 906.411 448.033 541.177 6911.391 848.641 2040.978 670.005 1703.593 1984.639
164 162 68beba727c 2026-09-30 5679 Fix from_json() for enums with underlying type bool (#5679) 1986.468 4139.033 11632.833 3201.351 3798.006 888.464 438.471 535.903 6843.110 836.030 1996.109 685.053 1672.430 1940.598
165 163 fc4c9c3446 2026-09-30 5680 Fix clear() to also reset the subtype of a binary value (#5680) 1972.561 4094.867 11540.157 3155.722 3833.925 893.243 445.764 539.739 6848.562 843.068 2016.293 664.788 1685.759 1965.342
166 164 678fd3017b 2026-09-30 5681 Fix element path for map/unordered_map JSON_DIAGNOSTICS errors (#5681) 2014.783 4164.471 11563.614 3219.865 3891.917 892.727 445.945 542.044 6900.807 844.422 2034.323 669.901 1688.051 1981.601
167 165 6d7845d207 2026-09-30 5683 Fix deprecated json_pointer/string operator== warning in value() (#5683) 1965.197 4105.789 11501.364 3157.544 3800.289 898.122 445.399 539.685 6900.433 834.541 2000.133 652.354 1670.945 1960.876
168 166 42f89e3130 2026-09-30 5684 Let to_json(std::optional<T>) propagate exceptions from T's to_json (#5684) 2016.899 4156.430 11476.489 3216.315 3895.245 908.714 444.300 541.764 6923.422 839.459 2018.934 672.859 1689.306 1987.428
169 167 6218aa212b 2026-09-30 5687 Throw std::length_error for operator[](SIZE_MAX) instead of corrupting the array (#5687) 1989.158 4149.156 11547.229 3193.015 3845.187 905.308 446.389 541.290 6853.266 843.028 2037.245 661.213 1681.390 1966.649
170 168 1151826508 2026-09-30 5691 Take diff()'s fast path unless the object type reorders members (#5691) 1991.280 4147.341 11570.312 3171.182 3847.333 904.510 441.250 539.803 6885.776 836.303 2018.693 665.307 1685.990 1970.057
171 169 e444a66276 2026-09-30 5693 Copy values before inserting an initializer list into an array (#5693) 2000.774 4175.507 11546.979 3189.357 3841.169 897.455 442.384 539.493 6839.688 836.213 2014.519 667.390 1685.418 1968.991
172 170 bfea6f36d3 2026-09-30 5694 Fix to_msgpack() reading the inactive number union member (#5694) 1997.465 4144.279 11549.781 3224.287 3855.120 899.475 441.995 539.924 6903.776 839.550 2019.396 664.487 1688.249 1954.211
173 171 5b11a0282c 2026-09-30 5697 Exchange the CustomBaseClass subobject in basic_json::swap() (#5697) 1987.983 4074.349 11483.114 3174.632 3841.604 893.256 438.279 535.885 6866.641 834.328 1996.396 660.828 1676.300 1936.210
174 172 44a88d85be 2026-09-30 5698 Fix NLOHMANN_JSON_SERIALIZE_ENUM_STRICT's from_json message (#5698) 1972.237 4125.945 11373.917 3158.716 3810.039 890.097 438.075 534.577 6867.432 842.045 2028.150 664.206 1681.353 1936.231
175 173 bfe0f32d71 2026-09-30 5699 Fix std::terminate and null pointer access in input_stream_adapter (#5699) 2014.371 4159.779 11667.416 3200.425 3876.135 911.716 448.788 543.198 6932.657 852.397 2056.197 668.764 1699.573 1984.479
176 174 4bb1b14b06 2026-09-30 5702 Trim the compiler-appended NUL from wide/UTF string literals too (#5702) 1979.723 4105.685 11603.562 3180.932 3846.698 906.188 443.969 534.534 6837.479 840.588 2006.043 654.851 1672.289 1965.408
177 175 5bd766aa50 2026-09-30 5703 Move to_bson's binary subtype check into calc_bson_sizes (#5703) 1999.606 4183.386 11588.646 3192.771 3844.425 900.169 446.795 541.406 6888.114 847.107 2022.637 663.480 1686.702 1974.777
178 176 6ae17630a4 2026-09-30 5705 Reject integral keys for contains(), find(), and count() at compile time (#5705) 2000.405 4157.120 11551.656 3197.417 3891.646 903.558 448.544 541.553 6914.203 848.561 2042.578 663.661 1691.910 1974.341
179 177 7fd6895788 2026-09-30 5706 Hide a discarded container's content from the parser callback (#5706) 1971.987 4075.362 11463.219 3164.909 3797.453 889.534 443.974 535.026 6857.323 835.793 2025.343 651.970 1687.670 1951.428
180 178 66877675b1 2026-09-30 5719 Check the iterator range for binary values in basic_json(first, last) (#5719) 1970.369 4104.886 11534.635 3168.601 3796.291 897.271 444.655 538.917 6826.990 842.445 2016.962 650.099 1673.940 1953.693
181 179 2ea6d8c127 2026-09-30 5720 Require the found key to equal the looked-up key when comparing objects (#5720) 2015.556 4188.886 11567.125 3251.890 3863.818 903.970 448.691 540.422 6912.255 843.774 2044.479 653.832 1676.634 1951.959
182 180 67435c9c7e 2026-09-30 5721 Give a deep copy its type only after its container exists (#5721) 1994.257 4160.658 11600.553 3218.367 3880.128 900.769 449.260 541.607 6899.448 841.635 2043.909 666.759 1694.646 1974.861
183 181 6fc0d501f3 2026-09-30 5610 Move the user-defined string literals to <nlohmann/json_literals.hpp> and add JSON_NO_AUTOMATIC_UDLS (#5610) 2021.715 4187.888 11647.594 3209.388 3925.060 911.591 450.961 544.303 6975.265 845.109 2049.853 670.295 1697.019 1987.428
184 182 fdcc569eee 2026-09-30 5692 Use only documented StringType members in json_pointer (#5692) 1965.264 4147.273 11378.188 3159.364 3787.758 889.399 447.397 535.062 6809.698 835.116 2015.202 656.241 1689.072 1955.238
185 183 6a073dbae4 2026-09-30 5695 Give operator>> a strong exception-safety guarantee (#5695) 2010.979 4211.982 11698.218 3205.401 3897.172 898.499 445.961 545.225 6898.870 847.042 2051.316 664.716 1706.401 1981.247
186 184 3b6ae43c53 2026-09-30 5598 Add JSON_DISABLE_TUPLE_REFERENCE_CONVERSION to fix std::tuple conversions (#5598) 2025.122 4195.468 11682.199 3204.529 3924.068 904.766 448.209 544.669 7041.276 849.103 2047.488 665.592 1695.987 1984.755
187 185 7d7055ec50 2026-09-30 5723 Fix stack overflow converting deep values between specializations (#5723) 1985.310 4117.099 11457.052 3157.591 3832.175 895.910 442.225 535.237 6864.375 833.653 2001.760 679.826 1674.819 1956.998
188 186 35802e78d6 2026-09-30 5735 Remove dead Makefile targets; document macro_builder; tidy serve_header (#5735) 2004.498 4163.065 11590.594 3184.810 3902.229 906.494 447.394 539.542 6923.969 845.596 2044.457 666.187 1692.019 1977.030
189 187 c261578431 2026-09-30 5730 Deduplicate binary reader/writer helpers and fix stale comments (#5730) 1968.723 4154.789 11441.718 3160.367 3870.578 889.545 443.139 535.314 6850.886 837.281 2024.650 660.842 1691.628 1978.000
190 188 1d675cdb46 2026-09-30 5733 Fix CI jobs that check less than they claim; move arm64 to GitHub (#5733) 1995.704 4206.185 11691.125 3227.622 3966.104 909.748 449.770 541.566 6951.938 852.506 2009.592 663.701 1686.265 1983.285
191 189 a32f61eb98 2026-09-30 5678 Fix update() and merge_patch() when the argument is *this or one of its members (#5678) 2014.810 4157.101 11636.135 3210.326 3924.659 899.344 448.133 541.371 6913.401 841.487 2038.263 667.515 1697.503 1980.686
192 190 18dd5663b0 2026-10-01 5548 Diff deeply nested values without recursing per nesting level (#5548) 1990.931 4152.500 11469.697 3204.740 3985.593 903.248 448.981 540.974 6929.740 847.493 2040.504 665.352 1698.903 1981.438
193 191 3926fcaac3 2026-10-01 5729 Deduplicate serializer dump code; fix stale includes, docs, and lint (#5729) 1999.556 4178.489 11581.000 3208.657 3876.755 891.669 452.445 538.525 6893.078 846.721 2042.010 662.154 1689.653 1975.503
194 192 cff0a61369 2026-10-01 5731 Share DOM SAX position handling; fix stale parser and lexer comments (#5731) 2017.231 4112.604 11588.291 3157.047 3890.343 902.329 458.713 539.539 7020.568 847.995 2073.873 654.562 1696.823 1978.381
195 193 e400780533 2026-10-01 5745 Re-amalgamate single_include (#5745) 1980.338 4100.659 11418.854 3166.896 3835.432 885.298 452.886 538.053 6888.203 824.666 2031.410 650.846 1668.952 1949.107
196 194 6aec1a085f 2026-10-02 5677 Report BON8 input that ends after a UTF-8 lead byte as truncated (#5677) 2003.321 4099.066 11614.364 3159.029 3849.857 899.995 459.542 539.436 6904.474 843.221 2071.503 652.303 1685.702 1972.556
197 195 4d46bce4e1 2026-10-02 5750 Fix CI on develop (#5750) 1962.685 4025.677 11277.718 3103.052 3785.213 894.610 448.583 533.887 6870.062 834.856 2020.231 658.339 1674.874 1954.242
198 196 63c10a51fc 2026-10-02 5638 Review and extend the documentation, and check it in CI (#5638) 1968.954 4036.851 11425.135 3104.359 3797.852 902.519 451.067 537.668 6910.375 852.438 2043.889 674.938 1701.314 1971.711
199 197 6d0867a85f 2026-10-02 5751 Make comparisons with scalars noexcept only when the conversion is (#5751) 2008.360 4091.453 11376.562 3144.575 3820.110 903.850 455.980 538.035 6851.885 841.549 2010.128 667.182 1690.586 1970.957
200 198 d11e89471b 2026-10-04 5606 Assert on missing array indices in const operator[] and document the JSON pointer case (#5606) 2000.121 4075.695 11475.520 3139.456 3837.211 900.437 453.703 538.895 6921.432 845.064 2027.417 663.969 1679.148 1964.082
201 199 df27cc3d4c 2026-10-04 5682 Add scalar-on-left overloads for legacy discarded comparisons in C++20 (#5682) 2010.838 4092.432 11495.625 3125.726 3873.167 911.281 456.807 538.386 6911.630 844.451 2033.630 688.219 1691.407 1971.697
202 200 6f2048cd5d 2026-10-04 5685 Accept lvalues in ordered_map::emplace's value parameter (#5685) 1999.816 4095.006 11445.740 3136.685 3924.146 918.692 458.336 542.423 6968.520 848.783 2037.096 667.772 1708.274 2002.449
203 201 0d01d6ae90 2026-10-04 5686 Classify leaves with operator<=> itself past the nesting bound (#5686) 1983.320 4116.981 11466.250 3192.969 3923.208 914.596 456.625 539.558 6975.537 849.252 2056.035 701.221 1716.493 1983.908
204 202 b730946432 2026-10-04 5689 Fix key types convertible to std::string_view breaking lookups (#5689) 1990.288 4060.487 11377.709 3107.537 3803.857 892.191 451.727 538.045 6896.480 844.989 2018.884 658.649 1676.566 2023.638
205 203 49cd427196 2026-10-04 5690 Copy-construct the base class of a deep copy's elements, not assign it (#5690) 1983.320 4033.156 11333.843 3138.547 3882.878 894.785 454.473 538.337 6918.619 841.205 2072.151 655.193 1693.871 1977.288
206 204 756b28c2b8 2026-10-04 5696 Keep a NUL byte ending a // comment as the end of input (#5696) 1985.931 4099.331 11579.875 3148.560 3872.422 896.276 451.436 536.774 6901.156 845.631 2014.820 648.054 1685.199 1971.762
207 205 1edf0ef041 2026-10-04 5700 Fix value(json_pointer, default) aborting under JSON_NOEXCEPTION (#5700) 1987.233 4076.133 11442.625 3124.099 3888.688 898.266 454.349 539.423 6950.140 852.803 2030.279 654.586 1691.751 1978.197
208 206 a212d3b2e4 2026-10-04 5722 Preserve the object comparator's state in a deep copy past the nesting bound (#5722) 2000.138 4113.471 11391.854 3151.006 3866.904 905.695 455.384 539.504 6929.818 842.213 2029.619 674.438 1697.044 1983.856
209 207 1df1e8a845 2026-10-04 5591 Make cross-string-type basic_json conversion explicit without implicit conversions (#5591) 2000.533 4107.994 11370.989 3160.854 3881.635 897.877 455.201 540.307 6927.167 840.130 2053.458 664.118 1697.618 1982.876
210 208 38a2db260c 2026-10-04 5728 Remove dead metaprogramming and duplicated code in traits and pointers (#5728) 1971.450 4040.828 11319.270 3109.521 3819.505 903.606 451.137 538.725 6825.640 843.951 2016.652 663.160 1684.596 1958.896
211 209 c5650eaa3c 2026-10-04 5704 Reject malformed UTF-16/UTF-32 units in wide-string input (#5704) 2006.689 4133.594 11469.209 3180.930 3881.633 902.924 456.572 540.557 6992.385 850.474 2025.267 652.367 1680.025 1957.468
212 210 40021f38fb 2026-10-04 5589 Add basic_json::as_base_class and document name conflicts with custom base classes (#5589) 2012.673 4147.193 11453.250 3167.448 3892.542 910.149 457.238 541.642 6998.084 852.247 2049.759 652.868 1688.229 1972.508
213 211 73e9eae3c1 2026-10-04 5746 Add an error_handler parameter for UTF-8 to the binary readers and writers (#5746) 2013.845 4130.237 11456.041 3135.688 3818.956 892.111 449.408 538.308 6825.213 835.872 1495.468 697.054 1679.760 1970.285
214 212 d8d47be4a5 2026-10-04 5754 Fix CI on develop after merging the ready-to-merge PRs (#5754) 2013.191 4119.948 11573.656 3173.029 3941.703 912.201 459.208 541.264 7013.364 848.908 1514.681 699.273 1685.391 1984.652
215 213 6b4b825af2 2026-10-04 5607 Handle numbers that do not fit narrow number types in the binary readers (#5607) 2009.190 4044.127 11362.677 3127.688 3827.841 892.131 449.386 534.731 6915.360 829.562 1487.640 697.206 1688.237 1952.157
216 214 8c1f60a45e 2026-10-04 5600 Store maps with enum keys as objects (opt-in) (#5600) 2008.560 4128.059 11523.011 3187.763 3843.177 912.520 456.427 537.514 6859.010 839.685 1501.515 696.508 1688.848 1968.910
217 215 c5a7a4b46d 2026-10-04 5688 Add deprecated from_bon8/from_bjdata(ptr, len) overloads (#5688) 2030.310 4108.505 11412.907 3141.836 3899.435 904.756 455.298 541.069 6926.151 846.240 1504.193 700.820 1693.983 1987.713
218 216 23d3b373e1 2026-10-04 5755 Add JSON_DELETE_DEPRECATED_FUNCTIONS to delete the deprecated functions (#5755) 2018.708 4106.015 11533.729 3134.945 3826.409 899.623 452.833 538.544 6846.443 830.555 1509.060 705.724 1692.819 1971.476
219 217 8a142bc436 2026-10-06 5764 Fix CI on develop after #5600, #5607, and #5755 (#5764) 2017.533 4151.854 11526.334 3195.240 3884.953 907.457 456.697 540.114 6891.136 844.145 1517.241 699.051 1690.344 1972.104
220 218 5379e04ce4 2026-10-06 5761 Throw type_error.321 when serializing discarded values to binary formats (#5761) 1999.156 4055.300 11427.521 3153.581 3836.060 891.927 455.413 540.938 6883.093 853.094 1510.099 701.888 1686.695 1982.806
221 219 0a365865f9 2026-10-06 5762 Make basic_json destruction allocation-free and non-recursive (#5762) 2024.289 4081.646 10719.428 3112.958 3900.503 924.900 462.081 540.765 6965.453 850.019 1511.381 669.802 1620.269 1912.078
222 220 5ecb704f6b 2026-10-06 5592 Speedup; check for the expected separator before the lexer's token switch (#5592) 1920.428 3801.979 10139.250 2891.862 3833.159 823.859 451.951 540.310 6885.672 843.570 1512.778 668.793 1608.501 1885.206
223 221 6d4543e743 2026-10-06 5767 Fix destroy() for ObjectTypes without reverse iteration (#5767) 1929.030 3843.266 10232.541 2911.458 3926.867 830.030 450.002 542.043 6938.890 846.589 1515.211 675.264 1622.245 1904.006
224 222 9b179cee1e 2026-10-06 5770 Handle all value_t enumerators in has_no_children() (#5770) 1931.275 3794.497 10155.125 2891.927 3871.831 829.432 446.176 535.126 6909.625 833.114 1498.945 677.571 1615.785 1884.043
225 223 69874e4544 2026-10-06 5760 Fix NUL bytes in UBJSON/BJData high-precision numbers (#5760) 1924.896 3853.081 10247.750 2926.515 3872.041 835.227 453.025 541.002 6919.037 842.240 1521.169 674.487 1607.441 1880.884
226 224 162e13b86f 2026-10-06 5758 Add with_*_t alias templates to create basic_json types with changed template parameters (#5758) 1938.268 3842.126 10289.968 2914.104 3962.414 834.967 455.536 543.630 6969.266 850.082 1530.064 678.054 1635.303 1916.763
227 225 21a69230bd 2026-10-06 5585 Create a value before giving it its type (#5585) 1918.165 3829.354 10247.656 2914.619 3874.909 832.287 451.252 543.791 6873.995 839.514 1521.088 699.604 1615.742 1894.449
228 226 ff6f3d7d4a 2026-10-07 5766 Reject nested indefinite-length CBOR string chunks (#5766) 1926.074 3868.810 10256.823 2919.802 3957.807 832.129 457.241 543.640 7024.745 847.770 1522.612 705.623 1634.212 1918.402
229 227 1c754cfe31 2026-10-07 5701 Copy a pair-shaped array value under JSON_BRACE_INIT_COPY_SEMANTICS (#5701) 1930.652 3828.195 10263.927 2921.570 3901.404 832.628 455.652 541.701 6909.037 843.563 1512.309 704.354 1623.254 1909.917
230 228 24dd7c63f0 2026-10-07 5777 Re-amalgamate after #5740 (#5777) 1908.632 3833.930 10278.146 2905.443 3935.422 838.465 454.491 545.605 6905.047 839.087 1519.816 709.223 1618.643 1886.706
231 229 30e542e52a 2026-10-07 5776 Declare the namespace-scope constants in to_chars.hpp inline (#5776) 1934.934 3823.724 10229.636 2916.698 3929.565 829.102 452.279 543.038 6951.995 837.059 1524.049 720.722 1619.823 1903.938
232 230 367336c83d 2026-10-07 5779 Fix CI on develop after #5585 (#5779) 1928.921 3780.927 10153.395 2883.604 3877.750 824.488 451.999 543.662 6927.395 835.495 1506.387 694.058 1622.903 1907.732
233 231 069ace74af 2026-10-07 5707 Round-trip BJData ND-array annotations exactly (single precision, key order) (#5707) 1937.387 3843.716 10184.302 2923.323 3936.570 827.610 456.123 543.169 6907.756 847.020 1515.229 696.202 1626.001 1901.142
234 232 43fe8928e1 2026-10-07 5781 Stop binary writers overflowing the stack on deep values (#5781) 1961.046 3868.274 10300.573 2899.792 3982.526 845.594 461.395 543.298 7059.093 846.696 1522.728 697.717 1623.846 1921.370
235 233 a5f5d3059b 2026-10-07 5772 Make std::hash<basic_json> consistent with operator== for numbers (#5772) 1949.220 3857.159 10170.427 2890.052 3981.349 840.234 459.334 541.947 6953.786 843.495 1509.713 703.339 1627.086 1911.653
236 234 a269794db7 2026-10-08 5782 Use MSVC intrinsics for full multiplication (#5782) 1931.869 3817.742 10159.666 2902.820 3903.263 840.740 455.827 540.621 6884.562 843.272 1513.776 702.028 1614.459 1901.008
237 235 69a0c1b82c 2026-10-09 5328 Avoid allocating temporary basic_json for cbor and msgpack object keys (#5328) 1909.579 3777.560 10065.682 2852.732 3897.659 833.289 459.856 540.631 6882.354 833.998 1498.288 314.059 1609.343 1906.714
238 236 374dfe4f0f 2026-10-09 5791 Keep converted object keys alive while writing UBJSON and BJData (#5791) 1911.274 3827.188 10159.553 2886.568 3890.388 833.632 459.800 542.649 6954.547 838.507 1509.324 314.357 1613.655 1892.838
239 237 44e8597701 2026-10-09 5792 Flatten deeply nested values without recursing per nesting level (#5792) 1940.103 3811.779 10139.396 2865.050 3874.896 835.001 459.686 544.065 6866.943 836.862 1496.298 314.617 1614.837 1891.741
240 238 2913e96433 2026-10-09 5793 Unflatten in time and memory linear in the pointer depth (#5793) 1908.453 3785.099 10262.147 2878.961 3920.657 845.619 459.806 543.998 6874.813 832.659 1486.901 312.175 1589.620 1863.981
241 239 84ee12a67c 2026-10-09 5797 Make UTF8_ACCEPT/UTF8_REJECT inline variables to avoid TU-local exposure in modules (#5797) 1922.691 3792.849 10162.656 2871.562 3887.719 836.308 456.522 542.577 6912.807 840.369 1497.447 313.683 1609.988 1899.591
242 240 1649d9eda4 2026-10-11 5783 Use and extend the detail helpers to remove duplicated code (#5783) 1916.258 3804.242 10297.344 2913.118 3847.662 836.519 453.270 538.750 6953.015 832.774 1506.068 324.715 1596.974 1875.878
243 241 2cca04ae6f 2026-10-11 5800 Report one-character non-numeric array indices like longer ones (#5800) 1932.327 3803.750 10135.438 2881.041 3894.622 840.016 458.569 538.037 6842.948 829.444 1499.722 324.811 1607.194 1875.851
244 242 74a03dec84 2026-10-11 5802 Throw type_error.321 for discarded values in to_bon8 (#5802) 1924.695 3814.854 10084.239 2873.180 3848.498 839.406 450.575 534.181 6893.005 834.300 1503.369 324.389 1607.323 1887.871
245 243 e8b747e4bc 2026-10-11 5808 Re-amalgamate single_include after #5795 and #5806 (#5808) 1937.995 3840.622 10221.990 2896.024 3885.568 834.394 458.874 539.771 6906.182 839.793 1517.689 324.800 1609.838 1890.885
246 244 40a62947d3 2026-10-12 4965 support JSON Merge Patch (RFC 7396) diff creation (#4965) 1932.021 3822.188 10248.416 2924.560 3980.331 842.462 459.010 540.237 6978.526 838.941 1529.508 326.435 1636.153 1917.472
247 245 f23830b65e 2026-10-13 5809 Derive the lexer position lazily for seekable input (#5809) 1814.075 3368.028 9974.755 2807.532 3943.229 647.639 457.018 551.206 6954.166 843.355 1522.762 315.716 1618.953 1903.816
248 246 aa9620fb15 2026-10-13 5810 Skip the indentation after a newline 8 bytes at a time (#5810) 1719.629 2959.344 10139.771 2799.555 3939.292 592.867 465.821 545.858 6968.068 849.167 1519.774 315.385 1629.981 1907.253
249 247 e839bbd1c0 2026-10-13 5813 Export client-facing headers from json.hpp for IWYU / include-cleaner, and check clients in CI (#5813) 1725.742 2949.070 10136.603 2821.591 3919.927 589.957 463.642 544.851 6987.427 843.151 1517.562 314.425 1619.671 1903.613
250 248 5b4c8f9b00 2026-10-14 5738 Speed up the lexer: own float parser, string scan, and \u table (#5738) 1615.668 2934.565 8763.651 2794.503 3928.286 559.107 374.921 516.391 6937.140 815.776 1513.238 325.043 1625.226 1912.905
251 249 91a7a94cc6 2026-10-14 5634 Write doubles with the shortest digits (Żmij), digits in registers (#5634) 1613.126 2929.599 8708.599 2783.954 3874.248 548.449 363.632 468.127 2421.176 745.466 1511.406 323.743 1614.195 1900.392
252 250 a6e9785ab6 2026-10-15 5831 Look up the key only once in the callback parser's key() (#5831) 1589.309 2938.557 8798.823 2767.872 3882.154 547.301 364.257 467.833 2395.851 744.716 1506.830 316.192 1623.771 1899.458
253 251 0c4e7c103c 2026-10-15 5834 Make flatten() linear for ordered_json (#5834) 1625.754 2936.203 8755.088 2793.081 3879.740 557.529 366.745 468.359 2418.388 746.210 1524.325 315.954 1614.677 1898.544
254 252 0a4b3a84ee 2026-10-15 5836 Speed up JSON pointer parsing, formatting, comparison and lookup (#5836) 1622.914 2915.901 8819.073 2783.990 3922.758 558.429 366.216 470.019 2427.606 747.168 1526.881 316.972 1625.611 1912.601
255 253 6ba53e63dd 2026-10-15 5833 Speed up array-to-container from_json (#5833) 1626.155 2920.747 8777.989 2782.870 3988.206 560.154 367.695 469.892 2427.262 749.301 1529.474 316.399 1631.810 1915.217
256 254 ca7740fef2 2026-10-15 5837 Move elements when converting rvalue containers to JSON (#5837) 1615.747 2928.778 8765.792 2773.062 3926.456 561.034 367.498 469.807 2424.344 748.423 1523.215 316.339 1624.374 1894.455
257 255 4530d9681c 2026-10-15 5832 Fix quadratic parent updates for ordered_json with JSON_DIAGNOSTICS (#5832) 1618.937 2911.378 8794.094 2763.191 3886.974 555.789 366.475 469.275 2415.231 746.755 1512.590 315.856 1618.226 1899.284
258 256 91869983a0 2026-10-15 5840 Make the value lifecycle inline-friendly (#5840) 1595.075 2832.274 8420.390 2690.050 3876.841 555.209 366.118 469.783 2424.335 747.931 1485.914 314.048 1549.787 1775.823
259 257 6a27b9acb2 2026-10-15 5838 Construct remaining hot-path exceptions out of line so core functions inline (#5838) 1589.535 2824.360 8466.755 2699.690 3888.990 557.917 364.879 471.601 2422.995 746.543 1498.371 314.978 1539.656 1797.752
260 258 4f11512641 2026-10-15 5835 Speed up container destruction, iterator access and diff() (#5835) 1515.750 2714.756 8639.213 2574.698 3805.860 561.827 366.793 469.680 2421.769 748.727 1383.744 317.248 1446.525 1705.789
261 259 ed86019a21 2026-10-15 5839 Move binary reader error construction out of line (#5839) 1507.907 2766.774 8597.870 2622.289 3767.638 553.026 362.644 468.482 2408.731 744.936 1362.080 324.833 1445.531 1703.216
262 260 6261d1e432 2026-10-15 5842 Construct the JSON Patch exceptions out of line (#5842) 1532.015 2756.867 8670.677 2617.989 3869.133 558.865 365.834 469.932 2435.279 750.295 1380.628 327.010 1453.340 1705.232
263 261 ce28c722bc 2026-10-15 5815 Allow the same type for number_integer_t and number_unsigned_t (#5815) 1533.045 2775.807 8543.755 2615.412 3776.721 553.127 365.866 471.174 2433.384 745.309 1372.372 328.405 1452.848 1716.649
264 262 91b9ee2602 2026-10-15 5829 Update cppcheck to 1.5.2 (Cppcheck 2.20) and fix its new findings (#5829) 1516.450 2748.961 8571.521 2599.870 3807.744 557.303 367.220 472.209 2421.389 743.889 1379.405 326.087 1451.926 1710.506
265 263 dcb96e82fb 2026-10-15 5822 Escape characters below 0x60 from a table straight into the write buffer (#5822) 1525.777 2734.963 8524.771 2588.289 3790.726 557.907 360.057 463.574 2430.626 743.382 1375.816 325.308 1439.947 1695.307
266 264 b41228c227 2026-10-15 5843 Fix AppVeyor failures from the Zmij double writer (#5843) 1497.922 2690.614 8406.906 2582.482 3726.195 548.374 352.932 459.663 2398.953 737.639 1347.507 322.827 1429.640 1682.775
267 265 4da73dc5ff 2026-10-15 5858 Fix compiler warnings on develop from the API performance stack (#5858) 1523.138 2731.825 8474.073 2593.149 3782.769 553.758 359.180 462.915 2380.246 739.049 1346.755 324.909 1441.408 1698.043
268 266 5683f5e024 2026-10-15 5859 Define less_general() only without three-way comparison (#5859) 1504.689 2739.172 8603.693 2605.159 3797.057 560.213 358.865 464.429 2423.456 742.207 1374.000 326.702 1447.488 1712.379
269 267 cd6b428ef0 2026-10-16 5860 Fix CI failures on develop from the API performance stack (#5860) 1510.160 2732.695 8564.510 2603.242 3810.518 556.015 362.409 466.047 2437.364 745.153 1377.439 325.753 1444.892 1699.255
270 268 cc8334113c 2026-10-19 5866 Do not use Qt's keyword macros as identifiers (#5866) 1498.858 2732.644 8535.328 2587.258 3787.993 548.267 362.607 464.487 2403.147 735.633 1368.831 323.997 1442.709 1686.963
271 269 4da932f518 2026-10-19 5828 Make parsing from std::istream and FILE* fast (#5828) 1499.289 2723.605 8397.787 2597.237 1956.330 553.182 363.501 458.898 2397.342 733.054 1362.816 320.346 1429.314 1698.294
272 270 122d718330 2026-10-21 5620 Add json_document and json_view: node index, parser, and document (#5620) 1520.651 2751.099 8527.135 2588.494 1994.466 560.384 362.257 461.917 2393.611 741.198 1362.167 328.620 1441.211 1691.238 230.700 389.375 976.277
273 271 43e97b629b 2026-10-21 5622 Add element access, iteration, values, and JSON pointers to json_view (#5622) 1493.875 2687.307 8383.354 2567.078 1986.311 547.934 353.938 462.380 2400.331 737.098 1374.560 322.012 1445.504 1686.421 231.353 386.679 958.441
274 272 4c3a3eb5b5 2026-10-21 5624 Add dump() and comparisons to json_view (#5624) 1502.926 2714.747 8522.161 2608.565 2001.856 552.014 359.510 462.656 2393.110 732.091 1366.524 324.313 1442.119 1682.564 228.836 393.082 976.976
275 273 3ff37ead75 2026-10-21 5628 Scan json_view strings with SIMD and index large objects (#5628) 1514.580 2728.619 8406.562 2609.758 2041.176 556.017 357.330 462.573 2383.158 733.939 1368.057 324.391 1442.711 1700.884 177.833 367.806 950.071
276 274 823eee3b59 2026-10-21 5630 Add editable json_documents: set, push_back, insert, and erase (#5630) 1498.134 2754.810 8537.062 2588.474 1994.441 556.670 353.931 463.646 2392.987 740.023 1357.930 324.129 1441.622 1698.022 181.404 376.470 962.253
277 275 4971200b54 2026-10-21 5632 Add images of json_documents: save() and load() (#5632) 1494.231 2681.211 8425.834 2543.276 1984.849 548.146 354.762 460.440 2414.747 734.679 1363.841 321.349 1421.806 1670.134 177.777 368.631 949.292
278 276 4155e2938f 2026-10-21 5633 Write json_view's dump() without a call or conversion per token (#5633) 1500.247 2712.357 8612.193 2597.211 2012.860 558.559 359.889 462.371 2412.896 739.048 1372.456 324.070 1441.546 1697.571 180.320 371.514 954.088
279 277 08d7fbb0a1 2026-10-21 5874 Read FILE* input with std::fgetc under MemorySanitizer (#5874) 1543.124 2758.211 8565.730 2584.453 2046.255 558.522 358.865 464.542 2421.435 743.715 1374.005 324.687 1462.572 1700.819 180.714 372.601 965.361
280 278 0cbe95ffa2 2026-10-21 5824 Speed up writing CBOR and MessagePack, above all integer arrays (#5824) 1501.550 2706.534 8707.120 2584.807 2039.728 551.688 360.692 466.024 2397.182 742.777 1361.847 201.488 1429.223 1682.436 178.641 371.038 946.389
281 279 bd5227c2ec 2026-10-21 5805 Fix silent wrong results for custom number types (#5805) 1511.036 2733.325 8786.406 2588.906 2000.483 553.456 360.458 465.989 2398.381 743.338 1370.524 201.168 1444.051 1701.345 179.776 372.557 954.733
282 280 e13e976801 2026-10-21 5851 Accumulate number digits while scanning them (#5851) 1501.737 2667.570 7762.365 2523.289 1987.518 545.368 359.336 462.056 2407.652 739.226 1368.104 200.632 1440.390 1688.117 178.721 374.278 956.353
283 281 5e13f834c1 2026-10-21 5852 Copy the text of float tokens only when a SAX handler asks for it (#5852) 1512.318 2655.312 7314.354 2515.044 2019.288 547.993 362.038 463.788 2410.262 745.839 1364.898 208.969 1450.422 1713.902 179.198 371.996 968.699
284 282 e9970066c5 2026-10-21 5853 Scan strings with SSE2, SSSE3, or NEON (#5853) 1488.705 2654.404 7339.589 2551.050 2015.716 486.719 341.381 475.591 2434.369 756.973 1376.754 208.797 1449.981 1706.044 182.358 379.153 968.355
285 283 fa37b952df 2026-10-21 5854 Match literals without a stack array and keep parser states in bytes (#5854) 1471.894 2619.164 7285.000 2485.883 1949.380 471.534 347.785 475.287 2413.552 751.487 1374.254 207.522 1443.177 1699.611 181.643 377.971 977.268
286 284 52fecc1fab 2026-10-21 5855 Move object keys into the value when parsing (#5855) 1392.599 2628.688 7362.562 2485.293 1882.663 471.968 339.711 473.663 2414.903 751.376 1319.857 200.185 1448.057 1705.675 179.410 371.865 963.306
287 285 6aefd8c662 2026-10-21 5878 Copy short printable-ASCII strings without starting the scanner (#5878) 1399.384 2664.401 7232.557 2535.425 1922.431 470.185 320.230 418.440 2446.082 696.786 1317.889 201.955 1447.217 1701.135 180.860 376.217 968.215
288 286 7c26e99ac5 2026-10-21 5879 Copy ASCII strings in the view's dump with ensure_ascii (#5879) 1361.839 2610.182 7187.115 2471.708 1853.592 464.274 313.821 414.316 2388.840 687.851 1318.253 200.399 1434.986 1697.487 178.601 368.595 947.799
289 287 3e031b06a5 2026-10-21 5876 Use standard library helpers where available, with C++11 fallbacks (#5876) 1381.599 2592.122 7336.719 2499.994 1848.434 467.895 315.257 415.788 2430.769 692.250 1311.164 200.424 1444.303 1698.311 180.149 374.484 961.091
290 288 9bf531436f 2026-10-21 5861 Speed up flatten(), unflatten(), diff() and patch() (#5861) 1379.301 2613.219 7170.433 2472.628 1853.035 467.161 315.217 412.303 2406.597 683.062 1298.512 198.681 1434.089 1682.912 177.511 368.116 947.255
291 289 9855db81f3 2026-10-22 5881 Silence macro-to-enum for the endianness macros (#5881) 1369.150 2613.547 7209.787 2476.232 1841.347 467.780 316.011 416.187 2415.504 686.920 1304.263 200.868 1441.243 1694.603 178.739 368.123 948.579
292 290 aa0b371f7c 2026-10-23 5884 Faster std::istream input: inline get-area path, binary reads, unbuffered streambufs (#5884) 1375.030 2569.362 7218.375 2484.425 1743.476 470.240 319.245 403.750 2436.034 679.759 1319.508 201.531 1443.354 1698.057 180.133 372.206 946.488
293 291 86d5c56c54 2026-10-23 5886 Speed up flatten(), unflatten(), diff() and patch() further (#5886) 1386.169 2622.331 7281.551 2495.923 1700.794 472.317 317.282 403.416 2409.097 682.507 1320.319 200.963 1444.908 1697.678 179.138 375.751 954.573
294 292 dec0e9b749 2026-10-23 5883 Write strings, scalars and indentation in dump() with fewer calls (#5883) 1383.235 2621.847 7151.412 2491.644 1732.469 473.034 211.016 288.685 2276.953 416.068 1318.490 200.574 1452.099 1701.256 180.064 372.324 960.583
295 293 6fa14d8f95 2026-10-23 5885 Write binary formats through reserved sink space and number runs (#5885) 1366.956 2600.914 7176.994 2465.343 1691.333 462.351 210.662 285.259 2301.553 417.589 1324.173 136.601 1429.240 1687.947 179.319 368.881 962.518
296 294 0b924f5375 2026-10-23 5887 Split and print JSON pointers in one pass (#5887) 1377.526 2597.394 7242.688 2464.445 1739.841 466.382 211.716 288.202 2319.771 418.288 1318.592 138.744 1441.983 1706.639 179.684 372.087 976.078
297 295 e9c4fe3cdf 2026-10-24 5889 json_view: indented and ensure_ascii dumps through the fast writer (#5889) 1393.007 2627.226 7248.287 2491.551 1769.642 469.976 211.665 291.327 2305.655 420.168 1319.431 139.577 1457.965 1712.927 182.274 377.741 983.284
298 296 dd7686a269 2026-10-24 5888 json_view: faster reading, indexing and C-stream parsing (#5888) 1382.444 2607.026 7161.365 2472.635 1701.277 468.438 209.963 287.564 2276.329 415.511 1311.194 137.875 1439.700 1696.646 177.624 367.131 977.802
299 297 9c50bdd140 2026-10-24 5882 Make the DOM parser cheaper per container and per member (#5882) 1392.673 2461.082 6068.625 2334.706 1696.950 475.550 209.313 291.776 2300.287 416.349 1317.581 138.194 1441.209 1707.720 178.751 367.339 978.031
300 298 01139dc192 2026-10-24 5905 Silence an Infer false positive in json_view materialize (#5905) 1381.470 2463.013 6078.010 2335.216 1709.088 475.718 211.023 291.212 2275.302 418.098 1320.441 137.572 1443.434 1696.436 175.969 365.658 975.272
301 299 fe5e401870 2026-10-25 5901 Consolidate duplicated detail helpers and bodies (#5891) (#5901) 1395.881 2462.765 6066.698 2327.708 1706.745 474.184 212.683 289.321 2283.842 417.657 1314.153 138.084 1442.796 1696.588 177.144 364.092 961.847
302 300 3eae5680d6 2026-10-25 5902 from_json: number-first dispatch for arithmetic types, loop for std::array (#5902) 1397.343 2477.060 6080.864 2340.781 1711.774 481.523 213.618 289.360 2289.503 417.517 1313.541 138.271 1440.822 1695.785 178.731 367.293 983.555
303 301 2a56afc714 2026-10-25 5916 Fix VS 2015 build of the DOM parser (#5882) (#5916) 1373.929 2476.139 6056.797 2341.890 1749.167 482.883 215.107 290.053 2292.495 417.441 1320.640 137.868 1445.227 1702.064 177.912 367.669 984.794
304 302 d6431a9104 2026-10-26 5918 Throw out_of_range.411 for JSON Patch add into a null parent (#5917) (#5918) 1371.635 2445.905 6017.636 2314.178 1696.447 478.134 210.996 287.397 2278.718 414.186 1291.197 137.374 1436.212 1682.197 175.790 361.130 962.070
305 303 81d66291c5 2026-10-26 5358 Create objects for pointer tokens that cannot be array indices (#5358) 1382.909 2465.649 6052.114 2332.556 1711.721 479.927 213.359 289.913 2289.412 417.201 1311.695 137.572 1437.168 1696.302 177.495 367.526 963.924
306 304 d5da84249f 2026-10-26 5927 Skip CBOR tags in front of map keys, validate indefinite text chunks, fix CBOR docs (#5927) 1374.553 2476.464 6076.834 2346.075 1744.224 483.375 211.423 291.148 2287.800 420.247 1320.015 137.369 1449.068 1704.785 177.459 365.004 963.908
307 305 0c3570d44a 2026-10-26 5929 Validate the UBJSON/BJData container type marker for count 0; fix UBJSON docs (#5929) 1381.462 2462.578 6055.183 2329.970 1713.086 484.962 210.683 290.024 2260.371 416.895 1319.093 137.782 1453.495 1706.801 177.031 361.025 962.952
308 306 dc768a7d5d 2026-10-26 5930 Fix BSON binary subtype 0x02 and check the declared document size earlier (#5930) 1386.856 2463.400 6054.255 2337.105 1746.441 485.425 214.508 290.954 2314.702 418.769 1325.164 139.255 1452.125 1718.313 179.005 367.327 977.054
309 307 60107eda3f 2026-10-26 5931 Read BJData ND-arrays of float16, restrict ND-array char to 0..127, correct BJData docs (#5931) 1389.051 2464.457 6049.084 2336.727 1710.473 483.159 213.007 288.990 2285.073 417.663 1317.537 137.893 1443.301 1697.126 178.706 364.051 962.202
310 308 731f1b5bfb 2026-10-26 5919 json_view: view_mode enum instead of bool Editable, node_kind for node::kind (#5919) 1381.664 2428.529 5978.713 2333.485 1746.571 479.163 211.036 288.957 2281.592 416.990 1308.904 137.486 1447.665 1691.427 175.453 363.704 963.371
311 309 4cdfa6d0f4 2026-10-26 5920 json_view: no save() and load() on big-endian targets (#5920) 1390.901 2477.841 6102.474 2337.925 1777.003 485.382 214.373 290.946 2303.147 421.178 1321.976 139.942 1446.726 1704.816 179.928 367.825 976.532
312 310 5a2819c940 2026-10-26 5921 json_view: one SIMD macro set with the library (#5921) 1393.409 2479.841 6073.011 2350.336 1785.087 485.658 214.651 292.044 2304.448 418.026 1326.212 138.942 1468.981 1719.505 179.174 368.704 982.764
313 311 e5fe4ebdd2 2026-10-26 5922 json_view: from_json() of the macros reads views directly (#5922) 1384.612 2467.078 6056.328 2337.309 1742.751 482.554 213.389 289.543 2299.118 417.521 1309.673 138.237 1448.628 1704.550 177.925 365.163 984.351
314 312 9e67bfa115 2026-10-26 5923 json_view: the library's std conversions read views directly (#5923) 1395.103 2482.517 6066.604 2350.538 1751.603 482.504 213.399 290.185 2306.188 420.406 1317.415 138.730 1444.367 1708.720 178.016 369.111 975.875
315 313 21ec9bd801 2026-10-27 5915 json_view: fewer allocations when parsing small documents (#5915) 1388.282 2469.118 6066.495 2340.391 1744.901 478.745 214.934 292.970 2309.264 422.842 1323.237 138.541 1454.151 1707.314 178.058 366.514 958.110
316 314 2bb2feeef4 2026-10-27 5942 Fix the red CI on develop (json_view pointer tokens, bson, from_json tests, Infer, IWYU) (#5942) 1391.981 2468.266 6068.495 2335.707 1751.527 482.908 214.285 291.291 2300.453 417.876 1328.089 138.010 1454.934 1701.845 178.250 367.182 964.917
317 315 78a0687147 2026-10-27 5940 Strong exception guarantee for operator[](json_pointer) (#5940) 1379.414 2467.492 6109.136 2335.309 1723.090 480.260 216.197 292.075 2313.798 415.444 1314.530 138.314 1449.629 1698.792 177.628 364.844 965.314
318 316 091c10d4a5 2026-10-28 5936 Fix self-aliasing in json_pointer::operator/= and patch_inplace (#5936) 1389.195 2462.409 6052.125 2321.091 1722.944 473.064 214.421 290.952 2279.997 416.589 1315.370 138.531 1437.996 1683.844 176.596 363.105 952.473
319 317 54f6b3ef06 2026-10-28 5945 json_view: source positions in materialize() with JSON_DIAGNOSTIC_POSITIONS (#5945) 1417.895 2496.591 6325.787 2377.105 1737.749 478.133 213.209 293.150 2304.971 422.648 1348.357 139.793 1490.556 1735.758 178.445 368.380 990.587
320 318 0115bb47b3 2026-10-30 5965 Name the source and license of adapted code in the file comments (#5965) 1378.289 2456.731 6043.011 2330.780 1711.965 470.960 212.371 290.798 2298.443 419.433 1323.072 137.982 1441.316 1690.457 176.197 363.182 977.928
321 319 0b91f9ddd8 2026-10-30 5926 json_view: check_utf8 skips well-formed runs with the parser's string scan (#5926) 1400.777 2488.449 6137.021 2359.856 1747.026 473.449 213.226 290.736 2320.524 420.950 1325.039 139.324 1452.907 1703.426 177.699 364.500 988.981
322 320 ea03d601af 2026-10-30 5890 json_view: comparison without temporaries and a faster image float check (#5890) 1388.958 2477.531 6127.547 2357.032 1781.238 477.111 216.144 293.938 2340.267 424.058 1337.149 139.387 1459.923 1723.919
323 321 755bb16d7a 2026-10-30 5966 Fix the red CI on develop: remove the duplicate is_editable in basic_json_view (#5966) 1411.867 2497.560 6085.938 2326.880 1726.740 480.376 212.294 292.134 2312.521 420.608 1325.345 138.544 1465.640 1744.928 177.785 367.385 992.034
324 322 4fe670b5f4 2026-10-31 5969 json_view: decode chains of unicode escapes in a loop (#5969) 1390.866 2466.769 6026.817 2328.995 1736.168 475.935 212.530 291.166 2284.708 418.661 1323.436 137.513 1495.099 1736.832 176.566 365.541 963.794
325 323 9c349b1d7c 2026-10-31 5964 Write integers of 17 to 20 digits eight digits at a time in dump() (#5964) 1390.500 2469.332 6079.698 2359.276 1718.121 470.647 209.615 289.143 2300.836 419.976 1331.637 138.488 1450.106 1703.483 176.731 365.394 953.483
326 324 3fd3e0fdaa 2026-11-01 5908 json_view: dump and read canada.json-style floats faster (batched float decisions) (#5908) 1366.359 2456.409 6058.422 2329.066 1713.347 470.784 209.895 289.318 2294.111 417.490 1319.403 138.100 1435.053 1698.647 176.006 363.191 954.196
327 325 76001c6b4c 2026-11-01 5968 BSON reader: find C-string terminators 8 bytes at a time, skip array element names (#5968) 1408.222 2488.159 6124.287 2363.039 1759.751 477.558 216.880 294.011 2317.898 420.892 1345.718 138.602 1460.432 1713.978 179.721 370.205 970.525
328 326 1a018577cc 2026-11-01 5970 json_view: accept() checks the text without writing an index (#5970) 1427.279 2506.345 6160.916 2368.009 1765.595 480.552 214.060 293.093 2341.368 419.303 1330.990 138.625 1463.731 1724.021 181.150 373.171 964.666
329 327 162eda2574 2026-11-01 5971 json_view: skip the digits of a fraction 16 bytes at a time (SSE2) (#5971) 1404.191 2474.144 6049.006 2363.726 1711.013 471.608 211.613 289.736 2290.230 418.673 1322.822 138.556 1441.219 1697.559 178.814 370.881 956.959
330 328 6c3ab966d3 2026-11-01 5975 CBOR reader: read runs of scalar array elements in one loop (#5975) 1385.800 2466.923 6050.480 2325.901 1725.552 474.248 210.034 289.350 2296.399 418.689 1327.626 137.722 1440.577 1698.622 178.627 367.797 953.174
331 329 aecbef3949 2026-11-01 5976 Binary readers: swap the bytes of floats with a single byteswap (#5976) 1393.659 2479.298 6092.110 2337.421 1718.218 472.539 211.337 289.638 2307.378 417.589 1324.038 137.341 1447.860 1701.387 179.160 369.448 956.324
332 330 edf8d17601 2026-11-01 5980 MessagePack reader: read runs of scalar array elements in one loop (#5980) 1422.081 2486.171 6157.302 2360.678 1733.503 477.472 211.189 289.309 2307.724 419.448 1334.857 138.914 1449.345 1721.126 180.127 369.693 967.370
333 331 fb515ddc34 2026-11-01 5981 UBJSON/BJData readers: read optimized arrays of numbers in one loop (#5981) 1387.633 2470.528 6067.657 2345.342 1721.303 476.141 212.198 288.466 2292.649 416.597 1324.486 139.598 1441.019 1705.957 179.190 367.903 959.677
334 332 517444b504 2026-11-01 5978 accept() checks strings without copying them (#5978) 1385.026 2453.809 5975.744 2322.357 1711.222 475.186 210.256 288.348 2282.444 415.256 1321.012 138.726 1434.772 1698.120 178.106 365.411 976.135
335 333 9742edc294 2026-11-01 5979 BSON writer: write to_bson(j) in one pass, with sizes written afterwards (#5979) 1418.816 2514.802 6091.854 2380.269 1772.646 474.067 211.598 290.653 2316.886 421.043 1346.324 139.213 1469.659 1754.493 180.269 372.201 982.753
336 334 f022e3c59c 2026-11-01 5982 Binary readers and writers: faster UTF-8 checks of strings (#5982) 1399.836 2474.703 6060.781 2341.409 1707.583 468.692 209.824 290.357 2290.034 418.739 1312.448 138.360 1458.779 1707.575 178.911 369.303 968.200
337 335 ddc34f546a 2026-11-01 5974 json_view: exceptions name the path and the bytes of the value (#5974) 1394.263 2489.906 6017.599 2345.632 1728.593 473.672 210.364 289.980 2306.608 420.394 1327.301 138.827 1448.846 1707.037 177.406 368.436 978.755
338 336 b2674a4a2f 2026-11-01 5984 BSON reader: check array element names in place in strict mode (#5984) 1392.028 2460.989 5975.355 2357.154 1726.291 472.389 209.872 289.219 2301.092 417.632 1309.441 138.779 1438.270 1709.943 177.580 366.368 973.214
339 337 76dbe8f9c9 2026-11-02 6009 Fix the red CI on develop: Visual Studio 2017 build of the BSON writer, Valgrind timeouts (#6009) 1387.812 2461.244 5975.843 2323.693 1713.572 469.489 209.863 289.058 2291.892 415.935 1306.729 138.322 1447.714 1694.220 177.698 363.994 972.289
340 338 03d408aafa 2026-11-02 6003 JSON_DIAGNOSTIC_POSITIONS: comparing a value-initialized iterator throws instead of crashing (#6003) 1385.014 2455.146 5981.995 2380.493 1732.039 466.575 209.272 289.474 2295.226 416.844 1301.454 138.016 1445.840 1703.494 176.691 365.416 967.929
341 339 66e2eeeec0 2026-11-02 6000 Do not construct the base class when destroying a container (#6000) 1403.795 2457.426 6001.495 2323.510 1718.268 471.022 210.474 288.385 2308.462 417.187 1313.263 138.770 1437.867 1705.586 179.168 363.523 966.701
342 340 bdc737db6d 2026-11-02 5999 json_view: dump() without StringType::capacity() (#5999) 1378.656 2452.954 6020.464 2339.908 1724.630 470.774 211.638 288.939 2303.773 418.311 1312.024 139.010 1446.709 1704.406 177.291 363.859 966.602
343 341 494a74c242 2026-11-02 5996 insert(): strong guarantee for single elements, basic guarantee for the rest (#5996) 1390.153 2478.991 6032.084 2342.171 1727.040 469.799 213.660 291.104 2307.193 419.623 1329.285 139.000 1461.294 1718.750 178.995 366.898 974.652
344 342 bfe69c73c2 2026-11-02 5992 json_view: get<T>() of a boolean throws for the exact number types, as basic_json does (#5992) 1387.497 2452.207 6023.042 2335.261 1720.938 471.966 212.162 288.851 2310.949 417.260 1315.155 137.821 1448.762 1710.153 175.990 366.239 970.052
345 343 ff0bdfdef3 2026-11-02 5990 Keep the byte range in exceptions about the root value (#5990) 1386.358 2469.197 6037.812 2344.775 1768.382 479.285 214.375 290.939 2329.486 421.838 1332.654 138.666 1455.905 1720.376 178.637 368.500 972.955
346 344 1d69ef9ab4 2026-11-02 5997 Raise line coverage to 99.9 %: fix the measurement, remove unreachable code, add tests (#5997) 1404.481 2456.447 6166.942 2338.226 1749.981 478.338 211.609 289.387 2304.532 419.095 1321.195 140.055 1460.574 1706.842 179.067 369.688 982.029
347 345 5c4f585ac2 2026-11-02 6004 Lexer, parser, stream adapter, SAX: remove checks that invariants make dead (#6004) 1386.586 2468.772 6188.662 2373.328 1775.098 483.139 211.476 291.250 2315.874 420.854 1321.718 138.268 1464.254 1709.146 180.316 367.994 965.010
348 346 100f676b3e 2026-11-02 6012 Restore the two commits of #6005 that the stack merge dropped (fixes the build of develop) (#6012) 1369.597 2437.356 6122.282 2305.291 1691.485 472.217 208.716 288.666 2291.034 416.120 1300.906 137.896 1439.300 1688.769 176.641 366.389 972.368
349 347 590b622d48 2026-11-02 5991 parse(): propagate std::bad_alloc instead of crashing on a half-constructed member (#5991) 1377.480 2425.219 6113.438 2306.435 1716.697 474.315 209.052 288.883 2292.776 417.291 1305.336 137.989 1453.044 1704.638 179.096 368.072 978.198
350 348 6d5581c4e8 2026-11-02 6008 CBOR/MessagePack readers: leave one-element arrays to the general path (#6008) 1400.456 2439.163 6140.448 2328.635 1743.039 480.725 212.470 295.268 2348.332 427.202 1340.319 139.121 1489.584 1736.380 184.949 371.567 995.731
351 349 b18b6fc7e6 2026-11-02 6013 Build the parser's syntax error prefix with one concat() (#6013) 1370.175 2435.337 6098.834 2320.728 1726.256 472.914 210.817 289.786 2292.841 419.186 1306.593 139.277 1481.709 1714.543 177.065 366.270 971.330
352 350 07876e2292 2026-11-02 6015 json_view: a value that is not found has no bytes in its exception context (#6015) 1361.297 2435.980 6080.718 2305.853 1707.733 474.621 210.382 291.568 2337.276 424.783 1329.556 139.590 1450.506 1690.804 178.472 366.370 977.807
353 351 baba5db36f 2026-11-02 6016 Fix the MSVC and GCC builds of develop (C4127, -Weffc++) (#6016) 1381.280 2440.908 6116.068 2303.611 1713.472 476.121 210.492 290.105 2319.878 420.598 1318.037 139.554 1471.388 1729.097 177.078 369.621 959.145
354 352 57b898ef99 2026-11-03 5998 Replace a multibyte decimal point in dump() of a long double (#5998) 1376.416 2456.476 6107.073 2325.534 1714.240 471.800 213.484 290.901 2288.426 420.062 1304.744 139.492 1441.231 1696.537 176.981 363.955 944.685
355 353 efc437ef6e 2026-11-04 6002 UBJSON/BJData/MessagePack reader: reject a container count equal to SIZE_MAX (#6002) 1376.138 2441.279 6136.755 2331.556 1708.185 467.554 210.231 291.606 2314.834 415.023 1321.171 138.603 1456.238 1718.533 176.858 366.713 938.783
356 354 42825fba07 2026-11-04 6020 Binary writers: zero only a window ahead of the vector sink's position (#6020) 1391.971 2460.961 6101.484 2312.584 1736.846 484.624 211.385 289.579 2309.943 416.103 1316.307 138.308 1464.425 1715.552 179.565 367.624 969.541
357 355 1da8735154 2026-11-04 6023 Fix leak and crash when an allocation throws during parsing (#6023) 1358.000 2456.832 6148.140 2333.761 1752.168 487.998 213.374 290.735 2324.377 420.402 1316.165 139.748 1460.000 1714.216 179.958 367.953 970.615
358 356 e48800f09d 2026-11-04 6001 Binary reader and writer: remove checks that invariants make dead (#6001) 1371.292 2434.395 6104.099 2313.769 1711.288 483.297 211.214 288.130 2308.992 416.639 1300.966 138.719 1455.595 1695.539 180.445 370.313 962.574
359 357 951271127b 2026-11-07 6028 Binary readers: append strings straight from contiguous input (#6028) 1381.807 2431.713 6099.235 2311.519 1694.104 464.615 207.900 288.438 2322.463 418.952 1227.851 138.811 1468.723 1706.816 177.249 369.912 975.798
360 358 18138227dc 2026-11-07 6030 Scan the buffer of a FILE in bulk with glibc and the Apple C library (#6030) 1379.500 2439.343 6147.771 2308.199 1689.427 482.217 213.967 290.466 2309.747 420.209 1239.525 139.367 1443.438 1731.583 180.401 364.380 975.476
361 359 candidate develop + open pull requests 1230.726 2155.896 5188.718 2038.886 1713.280 234.359 212.584 289.591 2313.669 425.788 1234.309 137.017 1444.999 1699.919 179.250 367.586 954.772
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docs/mkdocs/scripts/figures/json_view_layout.py
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@@ -104,10 +104,8 @@ def ribbon(body, x0, y, cw, prefix, label=True):
# ---------------------------------------------------------------- figure 1: parse() vs json_document
def layout():
W, H, P = 840, 692, "jvl"
b = markers(P)
# --- panel A: basic_json::parse()
def layout_tree(b, P):
"""panel A: basic_json::parse(), y from 0 to 220"""
b.append(text(16, 26, "basic_json::parse(): a tree, every array, object, and string in its own heap allocation", "nj-jsonview-h"))
b.append(rect(16, 98, 60, 34, "nj-jsonview-box"))
b.append(text(46, 120, "json", "nj-jsonview-mono", anchor="middle"))
@@ -117,7 +115,7 @@ def layout():
rows = [('"port"', "6379", None), ('"price"', "19.9", "double: 19.90 is gone"), ('"tags"', "\u2022", None)]
for i, (k, v, note) in enumerate(rows):
y = 50 + i * 48
b.append(curve(192, 115, 226, y + 17, LINE, P, bend=0))
b.append(line(192, 115, 226, y + 17, LINE, P))
b.append(rect(228, y, 180, 34, "nj-jsonview-heap"))
b.append(text(240, y + 22, k, "nj-jsonview-mono", KEY))
b.append(text(396, y + 22, v, "nj-jsonview-mono", NUM if i < 2 else LINE, anchor="end"))
@@ -132,8 +130,9 @@ def layout():
b.append('<path class="nj-jsonview-sep" d="M624 %g V%g"/>' % (yt - 17, yt + 17))
b.append(text(601, yt + 5, "json", "nj-jsonview-mono", anchor="middle"))
b.append(text(647, yt + 5, "json", "nj-jsonview-mono", anchor="middle"))
b.append(curve(601, yt - 17, 706, 130, LINE, P, bend=-20))
b.append(curve(647, yt + 17, 706, 196, LINE, P, bend=20))
for x1, y1, y2 in ((601, yt - 17, 130), (647, yt + 17, 196)):
b.append('<path class="nj-jsonview-arr nj-jsonview-c-%s" d="M%g %g C%g %g %g %g %g %g" marker-end="url(#%s-%s)"/>'
% (LINE, x1, y1, x1, y2, x1 + 40, y2, 706, y2, P, LINE))
b.append(rect(708, 113, 126, 34, "nj-jsonview-heap"))
b.append(text(771, 135, "std::string eu", "nj-jsonview-mono nj-jsonview-sm", STR, anchor="middle"))
b.append(rect(708, 179, 126, 34, "nj-jsonview-heap"))
@@ -141,9 +140,10 @@ def layout():
# legend
b.append(rect(16, 186, 18, 14, "nj-jsonview-heap", rx=3))
b.append(text(42, 198, "a separate heap allocation", "nj-jsonview-note"))
# --- panel B: json_document::parse()
y0 = 252
b.append('<path class="nj-jsonview-sep" d="M16 %g H824"/>' % (y0 - 18))
def layout_index(b, P, y0):
"""panel B: json_document::parse(), y from y0 - 16 to y0 + 440"""
b.append(text(16, y0 + 10, "json_document::parse(): the source text stays where it is; one flat index of 16-byte nodes", "nj-jsonview-h"))
b.append(text(16, y0 + 38, "source text, 54 bytes (borrowed, or owned by the document)", "nj-jsonview-note"))
cw, rx0, ry = 14, 42, y0 + 48
@@ -185,6 +185,25 @@ def layout():
b.append(curve(vx + 105, vy, n6x, ny + nh, STRUCT, P))
b.append(text(30, ny + nh + 50, "integers are converted while parsing and kept in their node;", "nj-jsonview-note"))
b.append(text(30, ny + nh + 68, "floats and strings point back into the text", "nj-jsonview-note"))
TREE_DESC = ("The text {\"port\": 6379, \"price\": 19.90, \"tags\": [\"eu\", \"a\\\"b\"]} parsed by basic_json::parse(): "
"the root json value points to a std::map whose three nodes are separate heap allocations; the price is stored "
"as the double 19.9; the tags array is a std::vector of two json values, each pointing to its own std::string.")
INDEX_DESC = ("The same text parsed by json_document::parse(): it keeps the 54 bytes of source text and builds a flat index of "
"nine 16-byte nodes in document order: object, key port, unsigned integer 6379 (the converted value is in the "
"node), key price, float, key tags, array, string eu, and an escaped string. Keys, the float, and the plain "
"string point back into the source text; the escaped string points into the document's buffer of decoded "
"strings. A json_view is two pointers: one to the document and one to a node, here the array.")
def layout():
# both panels in one figure (features/json_view.md)
W, H, P = 840, 692, "jvl"
b = markers(P)
layout_tree(b, P)
b.append('<path class="nj-jsonview-sep" d="M16 234 H824"/>')
layout_index(b, P, 252)
write("json_view_layout.svg", W, H, "fig-jvl-title",
"The same J\u200bSON text parsed by basic_json::parse() and by json_document::parse()",
"The text {\"port\": 6379, \"price\": 19.90, \"tags\": [\"eu\", \"a\\\"b\"]}. Top: basic_json::parse() builds a tree: "
@@ -195,6 +214,16 @@ def layout():
"key tags, array, string eu, and an escaped string. Keys, the float, and the plain string point back into the "
"source text; the escaped string points into the document's buffer of decoded strings. A json_view is two "
"pointers: one to the document and one to a node, here the array.", b)
# each panel on its own (home/blog/how_3_13_0_got_faster.md), with their own marker ids
b = markers("jvlt")
layout_tree(b, "jvlt")
write("json_view_layout_tree.svg", W, 222, "fig-jvlt-title",
"A J\u200bSON text parsed by basic_json::parse()", TREE_DESC, b)
b = markers("jvli") + ['<g transform="translate(0 -236)">']
layout_index(b, "jvli", 252)
b.append('</g>')
write("json_view_layout_index.svg", W, H - 236, "fig-jvli-title",
"The same J\u200bSON text parsed by json_document::parse()", INDEX_DESC, b)
# ---------------------------------------------------------------- figure 2: lifetimes
docs/mkdocs/scripts/figures/perf_blog.py
+803
View File
@@ -0,0 +1,803 @@
"""Draws the figures of home/blog/how_3_13_0_got_faster.md as inline SVGs into docs/images/.
Generated files:
- perf_blog_overview.svg: speedup of 3.13.0 over 3.12.0 per workload (Google Benchmark suite)
- perf_blog_distribution.svg: how many of the suite's benchmarks got how much faster (data/perf_suite.csv)
- perf_blog_timeline_<workload>.svg: speedup over 3.12.0 of eight workloads at every develop commit that changed
json.hpp or json_view.hpp since 3.12.0, one panel each
- perf_blog_swar.svg: the eight-byte string test on one word of input
- perf_blog_overlap.svg: writing a short string with two overlapping 16-byte loads and stores
- perf_blog_digits.svg: converting eight ASCII digits with three multiplications
- perf_blog_cliffs.svg: operations that were quadratic or worse, 3.12.0 against 3.13.0 (log scale)
- perf_blog_heldout.svg: validate on the 19 files we didn't tune on, json_document against the fastest library per
file (data/perf_heldout_validate.json)
- perf_blog_usecases_<platform>.svg: libraries x use cases, time relative to the fastest fully validating library
(data/perf_usecases_<platform>.json); perf_blog_tables.py prints the tables of the appendix from the same data
The numbers are copied from the tables of the post (the timeline from data/perf_timeline.csv, which
`tests/benchmarks/history/history.py summarize` writes); the tables stay on the page as the accessible fallback. Update both together.
Like the figures of charts.py, the SVGs are not images: the page includes their text with
`--8<-- "images/<name>.svg"`, so they follow the colors and fonts of the page (`nj-charts` rules in
docs/css/fig-charts.css, `nj-fig` rules in docs/css/brand.css). Run `python3 scripts/figures/perf_blog.py` from
docs/mkdocs after changing data or drawing, and commit the generated files.
"""
import csv
import html
import json
import math
import re
from pathlib import Path
HERE = Path(__file__).resolve().parent
OUT = HERE.parents[1] / "docs" / "images"
MINUS = "&#8722;"
TIMES = "&#215;"
# words the abbreviation extension (includes/glossary.md) would wrap in <abbr> inside the SVG text
GLOSSARY = re.findall(r"^\*\[([^\]]+)\]", (HERE.parents[1] / "includes" / "glossary.md").read_text(), re.M)
ABBR = re.compile(r"(?<![\w;])(%s)(?!\w)" % "|".join(sorted(map(re.escape, GLOSSARY), key=len, reverse=True)))
def protect(text):
return ABBR.sub(lambda m: m.group(1)[0] + "&#8203;" + m.group(1)[1:], text)
def esc(s):
return html.escape(s, quote=True).replace("&amp;#", "&#")
def esc_md(s):
"""esc() for text with _ or *, which the page's Markdown pass would pair across text elements as emphasis"""
return esc(s).replace("_", "&#95;").replace("*", "&#42;")
def write(name, W, H, cls, tid, title, desc, body):
s = ['<svg class="nj-fig nj-charts %s" viewBox="0 0 %g %g" role="img" aria-labelledby="%s %s-d" '
'xmlns="http://www.w3.org/2000/svg">' % (cls, W, H, tid, tid),
'<title id="%s">%s</title>' % (tid, esc(title)),
'<desc id="%s-d">%s</desc>' % (tid, esc(desc))]
s += body
s.append('</svg>')
text = protect("\n".join(s)) + "\n"
assert "\n\n" not in text # a blank line would end the raw HTML block
(OUT / name).write_text(text)
def hbar(x0, x1, y, h, r=4):
"""Horizontal bar from the baseline x0 to x1, rounded only at the data end."""
if abs(x1 - x0) < 0.5:
return "M%g %g h0.5 v%g h-0.5 Z" % (x0, y, h)
r = min(r, h / 2, abs(x1 - x0))
s = 1 if x1 > x0 else -1
return ("M%g %g H%g Q%g %g %g %g V%g Q%g %g %g %g H%g Z"
% (x0, y, x1 - s * r, x1, y, x1, y + r, y + h - r, x1, y + h, x1 - s * r, y + h, x0))
def fx(v):
"""speedup factor for labels: 2 significant digits below 10, integers above"""
if v >= 100:
return "%d%s" % (round(v), TIMES)
if v >= 10:
return "%.0f%s" % (v, TIMES)
return "%.1f%s" % (v, TIMES) if v >= 1.995 else "%.2f%s" % (v, TIMES)
# ---------- SWAR: one word of a string ----------
def swar():
text = 'witter",'
W, H = 640, 312
L, cw, top = 40, 70, 34
b = []
b.append('<text class="fg-h" x="%g" y="20">eight input bytes, loaded as one 64-bit word (byte 0 is the lowest)</text>' % L)
for i, ch in enumerate(text):
x = L + i * cw
special = ch == '"'
b.append('<rect class="fg-cell" x="%g" y="%g" width="%g" height="40" rx="4"/>' % (x, top, cw - 6))
if special:
b.append('<rect class="nj-charts-c2" fill-opacity=".25" x="%g" y="%g" width="%g" height="40" rx="4"/>' % (x, top, cw - 6))
b.append('<text class="fg-code" x="%g" y="%g" text-anchor="middle">%s</text>' % (x + (cw - 6) / 2, top + 26, esc(ch)))
b.append('<text class="nj-charts-tick" x="%g" y="%g">0x%02X</text>' % (x + (cw - 6) / 2, top + 58, ord(ch)))
b.append('<text class="nj-charts-tick" x="%g" y="%g">byte %d</text>' % (x + (cw - 6) / 2, top + 74, i))
# result row
y2 = top + 112
b.append('<text class="fg-h" x="%g" y="%g">swar_string_special(): the high bit of each byte that needs handling</text>' % (L, y2 - 14))
for i, ch in enumerate(text):
x = L + i * cw
special = ch == '"'
b.append('<rect class="fg-cell" x="%g" y="%g" width="%g" height="34" rx="4"/>' % (x, y2, cw - 6))
if special:
b.append('<rect class="nj-charts-c2" fill-opacity=".25" x="%g" y="%g" width="%g" height="34" rx="4"/>' % (x, y2, cw - 6))
b.append('<text class="fg-code" x="%g" y="%g" text-anchor="middle">%s</text>'
% (x + (cw - 6) / 2, y2 + 23, "0x80" if special else "0x00"))
# conclusion
y3 = y2 + 70
b.append('<text class="fg-code" x="%g" y="%g">count_trailing_zeros(0x0080000000000000) = 55</text>' % (L, y3))
b.append('<text class="fg-code" x="%g" y="%g">55 / 8 = 6: copy bytes 0 to 5 in one go, then handle the quote</text>' % (L, y3 + 26))
b.append('<text class="fg-note fg-note--l" x="%g" y="%g">No branch per byte: a few subtractions, ANDs and ORs per word,</text>' % (L, y3 + 56))
b.append('<text class="fg-note fg-note--l" x="%g" y="%g">then one count of trailing zeros.</text>' % (L, y3 + 74))
write("perf_blog_swar.svg", W, H, "nj-charts--swar", "nj-blog-swar",
"Finding the end of a run of ordinary string characters eight bytes at a time",
"The eight bytes w, i, t, t, e, r, quote and comma are loaded as one word. The test sets the high bit only in "
"byte 6, the quote. Counting trailing zero bits gives 55, divided by eight gives 6: bytes 0 to 5 are copied "
"at once, then the quote ends the string.", b)
def span(b, x0, x1, y, cls, label):
"""a bracket under the cells from x0 to x1, tinted, with a label to its right or inside"""
b.append('<rect class="%s" fill-opacity=".22" x="%g" y="%g" width="%g" height="22" rx="4"/>' % (cls, x0, y, x1 - x0))
b.append('<rect class="%s" x="%g" y="%g" width="4" height="22" rx="2"/>' % (cls, x0, y))
b.append('<rect class="%s" x="%g" y="%g" width="4" height="22" rx="2"/>' % (cls, x1 - 4, y))
b.append('<text class="fg-code" x="%g" y="%g" text-anchor="middle" style="font-size:14px">%s</text>' % ((x0 + x1) / 2, y + 16, label))
# ---------- short strings: two overlapping 16-byte loads ----------
def overlap():
text = "profile_link_color" # a key of twitter.json, 18 bytes
n = len(text)
W = 640
L, cw, top = 40, 31, 34
X = lambda i: L + i * cw
b = ['<text class="fg-h" x="%g" y="20">a string of n = %d bytes: too long for one 16-byte vector, too short for a loop</text>' % (L, n)]
for i, ch in enumerate(text):
both = n - 16 <= i < 16
b.append('<rect class="fg-cell" x="%g" y="%g" width="%g" height="36" rx="4"/>' % (X(i), top, cw - 4))
if both:
b.append('<rect class="nj-charts-c3" fill-opacity=".3" x="%g" y="%g" width="%g" height="36" rx="4"/>' % (X(i), top, cw - 4))
b.append('<text class="fg-code" x="%g" y="%g" text-anchor="middle">%s</text>' % (X(i) + (cw - 4) / 2, top + 24, esc_md(ch)))
for i in (0, n - 16, 15, n - 1):
b.append('<text class="nj-charts-tick" x="%g" y="%g">%d</text>' % (X(i) + (cw - 4) / 2, top + 52, i))
y = top + 66
span(b, X(0), X(15) + cw - 4, y, "nj-charts-c1", "a = load 16 bytes at p")
span(b, X(n - 16), X(n - 1) + cw - 4, y + 30, "nj-charts-c2", "b = load 16 bytes at p + n " + MINUS + " 16")
y += 82
b.append('<text class="fg-note fg-note--l" x="%g" y="%g">Both loads lie inside the string, and together they cover all of it; bytes %d to 15 are in both.</text>' % (L, y, n - 16))
b.append('<text class="fg-note fg-note--l" x="%g" y="%g">Test a and b for a quote, a backslash, a control character or 0x7F: none, so write</text>' % (L, y + 22))
b.append('<text class="fg-code" x="%g" y="%g">store a at d, store b at d + n %s 16</text>' % (L, y + 52, MINUS))
b.append('<text class="fg-note fg-note--l" x="%g" y="%g">The second store writes bytes %d to 15 again, with the same values. For any n from 16 to 32:</text>' % (L, y + 80, n - 16))
b.append('<text class="fg-note fg-note--l" x="%g" y="%g">two loads, one test, two stores, no loop and no branch on the length.</text>' % (L, y + 98))
write("perf_blog_overlap.svg", W, y + 112, "nj-charts--swar", "nj-blog-overlap",
"Writing an 18-byte string with two overlapping 16-byte loads and stores",
"The 18 bytes of profile_link_color. Load a covers bytes 0 to 15, load b covers bytes 2 to 17, so bytes 2 to 15 "
"are in both. Neither contains a byte that needs escaping, so a is stored at the destination and b 2 bytes "
"later; the second store writes bytes 2 to 15 again with the same values. This works for any length from 16 to "
"32 bytes without a loop.", b)
# ---------- eight digits at a time: three multiplications ----------
def digits():
W = 600
L, cw, h = 40, 64, 34
X = lambda i: L + i * cw
steps = [
("eight ASCII digits in one 64-bit word (byte 0 is the lowest)", 1, list("12345678"), True),
("& 0x0F0F0F0F0F0F0F0F: one digit value per byte", 1, list("12345678"), False),
("× (10 · 2⁸ + 1) >> 8, every second byte kept: two digits per 16 bits", 2, ["12", "34", "56", "78"], False),
("× (100 · 2¹⁶ + 1) >> 16, every second lane kept: four digits per 32 bits", 4, ["1234", "5678"], False),
("× (10000 · 2³² + 1) >> 32: the value", 8, ["12345678"], False),
]
b = []
y = 20
for k, (head, width, cells, ascii_) in enumerate(steps):
b.append('<text class="fg-h" x="%g" y="%g">%s</text>' % (L, y, esc(head)))
for j, c in enumerate(cells):
x = X(j * width)
b.append('<rect class="fg-cell" x="%g" y="%g" width="%g" height="%g" rx="4"/>' % (x, y + 10, width * cw - 6, h))
if k == len(steps) - 1:
b.append('<rect class="nj-charts-c1" fill-opacity=".25" x="%g" y="%g" width="%g" height="%g" rx="4"/>' % (x, y + 10, width * cw - 6, h))
b.append('<text class="fg-code" x="%g" y="%g" text-anchor="middle">%s</text>' % (x + (width * cw - 6) / 2, y + 10 + 23, esc(c)))
if ascii_:
b.append('<text class="nj-charts-tick" x="%g" y="%g">0x%02X</text>' % (x + (width * cw - 6) / 2, y + h + 26, ord(c)))
y += h + (58 if ascii_ else 40)
b.append('<text class="fg-note fg-note--l" x="%g" y="%g">Each step combines neighboring lanes, in all lanes of the word at once:</text>' % (L, y - 8))
b.append('<text class="fg-note fg-note--l" x="%g" y="%g">three multiplications instead of eight, and no branch.</text>' % (L, y + 10))
write("perf_blog_digits.svg", W, y + 22, "nj-charts--swar", "nj-blog-digits",
"Converting eight ASCII digits to their value with three multiplications",
"The text 12345678 as one word. Masking gives the digit values 1 to 8, one per byte. Multiplying by 10 times 2 to "
"the 8 plus 1 and shifting gives 12, 34, 56 and 78 in 16-bit lanes; multiplying by 100 times 2 to the 16 plus 1 "
"gives 1234 and 5678 in 32-bit lanes; multiplying by 10000 times 2 to the 32 plus 1 gives 12345678.", b)
# ---------- overview: speedup per workload (Google Benchmark rows, 3.12.0 time / 3.13.0 time) ----------
# (group, label, speedup), copied from the table "The short version"
OVERVIEW = [
("Parsing", "twitter.json", 3.49),
("Parsing", "citm_catalog.json", 5.11),
("Parsing", "canada.json", 4.08),
("Parsing", "canada.json, indented", 7.41),
("Parsing", "citm, ordered_json", 8.18),
("Parsing", "twitter, std::ifstream", 2.46),
("Parsing", "citm, FILE*", 14.94),
("Parsing", "citm, accept()", 13.66),
("Writing", "dump() twitter", 6.60),
("Writing", "dump() canada", 2.90),
("Writing", "dump(4) citm", 4.62),
("Writing", "to_cbor() twitter", 4.41),
("Reading CBOR", "twitter, memory", 3.52),
("Reading CBOR", "twitter, FILE*", 9.23),
("Values", "diff() canada", 10.44),
("Values", "iterate canada", 1.96),
("Values", "copy + destroy citm", 1.11),
("Values", "== citm", 1.01),
]
def overview():
W, L, R = 560, 190, 520
hi = max(v for _, _, v in OVERVIEW)
hi = math.ceil(hi + 0.5)
X = lambda v: L + v / hi * (R - L)
pitch, bh, top = 24, 15, 8
b, desc = [], []
y = top
group = None
rows = []
for g, label, v in OVERVIEW:
if g != group:
if group is not None:
y += 10
b.append('<text class="nj-charts-panel" x="%g" y="%g">%s</text>' % (8, y + 12, esc(g)))
y += 22
group = g
rows.append((label, v, y))
y += pitch
axis_y = y + 2
for t in range(1, hi + 1):
b.append('<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(t), top, X(t), axis_y))
b.append('<text class="nj-charts-tick" x="%g" y="%g">%d%s</text>' % (X(t), axis_y + 16, t, TIMES))
for label, v, yy in rows:
b.append('<text class="nj-charts-rowlabel nj-charts-tick--r" x="%g" y="%g" text-anchor="end">%s</text>' % (L - 8, yy + bh - 3, esc(label)))
b.append('<path class="nj-charts-c1" d="%s"><title>%s: %s</title></path>' % (hbar(X(0), X(v), yy, bh), esc(label), fx(v)))
b.append('<text class="nj-charts-val" x="%g" y="%g">%s</text>' % (X(v) + 5, yy + bh - 3, fx(v)))
desc.append("%s %s" % (label, fx(v).replace(TIMES, "x")))
b.append('<line class="nj-charts-ref" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(1), top, X(1), axis_y))
b.append('<line class="nj-charts-zero" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(0), top, X(0), axis_y))
b.append('<text class="nj-charts-tick" x="%g" y="%g">speedup over 3.12.0 (3.12.0 = 1%s), more is better</text>'
% ((L + R) / 2, axis_y + 34, TIMES))
write("perf_blog_overview.svg", W, axis_y + 44, "nj-charts--blog", "nj-blog-overview",
"Speedup of 3.13.0 over 3.12.0 per workload, Apple M1 Max, Apple clang",
"Horizontal bars of the speedup, more is better. " + "; ".join(desc) + ".", b)
# ---------- distribution: how many of the suite's benchmarks got how much faster ----------
# bins of the speedup (3.12.0 time / 3.13.0 time) over all rows of data/perf_suite.csv
BINS = [(0, 1, "below 1" + TIMES), (1, 1.5, "1 to 1.5" + TIMES), (1.5, 2, "1.5 to 2" + TIMES),
(2, 3, "2 to 3" + TIMES), (3, 5, "3 to 5" + TIMES), (5, 10, "5 to 10" + TIMES), (10, 1e9, "10" + TIMES + " or more")]
def distribution():
rows = list(csv.DictReader((HERE / "data" / "perf_suite.csv").open()))
s = sorted(float(r["speedup"]) for r in rows)
n = len(s)
counts = [sum(lo <= v < hi for v in s) for lo, hi, _ in BINS]
geo = math.exp(sum(math.log(v) for v in s) / n)
med = (s[(n - 1) // 2] + s[n // 2]) / 2
W, H = 560, 250
L, R, T, B = 52, 548, 16, 196
hi = 10 * math.ceil(max(counts) / 10 + 0.4)
Y = lambda c: B - c / hi * (B - T)
slot = (R - L) / len(BINS)
b, desc = [], []
for t in range(0, hi + 1, 20):
b.append('<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (L, Y(t), R, Y(t)))
b.append('<text class="nj-charts-tick nj-charts-tick--r" x="%g" y="%g">%d</text>' % (L - 6, Y(t) + 4, t))
for k, ((lo, _, label), c) in enumerate(zip(BINS, counts)):
x = L + k * slot + 8
w = slot - 16
cls = "nj-charts-c2" if lo < 1 else "nj-charts-c1"
b.append('<rect class="%s" x="%.1f" y="%.1f" width="%.1f" height="%.1f" rx="3"><title>%s: %d</title></rect>'
% (cls, x, Y(c), w, B - Y(c), label, c))
b.append('<text class="nj-charts-val" x="%.1f" y="%.1f" text-anchor="middle">%d</text>' % (x + w / 2, Y(c) - 5, c))
b.append('<text class="nj-charts-tick" x="%.1f" y="%.1f">%s</text>' % (x + w / 2, B + 16, label))
desc.append("%s: %d" % (label.replace(TIMES, "x"), c))
b.append('<line class="nj-charts-axis" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (L, B, R, B))
b.append('<text class="nj-charts-tick" x="%g" y="%g">speedup over 3.12.0, more is better</text>' % ((L + R) / 2, H - 10))
b.append('<text class="nj-charts-tick" transform="rotate(-90)" x="%g" y="14">number of benchmarks</text>' % (-(T + B) / 2))
print("distribution: median %s, geometric mean %s" % (fx(med), fx(geo)))
write("perf_blog_distribution.svg", W, H, "nj-charts--blog", "nj-blog-dist",
"Speedup of 3.13.0 over 3.12.0 for all %d benchmarks of the suite" % n,
"Bars counting the benchmarks per speedup range: " + "; ".join(desc)
+ ". Median %s, geometric mean %s." % (fx(med).replace(TIMES, "x"), fx(geo).replace(TIMES, "x")), b)
# ---------- timeline: one panel per workload ----------
# (column in perf_timeline.csv, panel title, [(PR, label)]): each labeled step shows the number of the theme that
# explains it ("U" for the UTF-8 check of the binary readers that came and went); the appendix maps steps to PRs
TIMELINE = [
("parse_citm", "parse() citm_catalog.json", [(5234, "4"), (5283, "1"), (5592, "4"), (5809, "4"), (5810, "2"), (5882, "4"), (6031, "1")]),
("parse_canada", "parse() canada.json", [(5234, "4"), (5283, "1"), (5617, "3"), (5738, "3"), (5851, "3"), (5882, "4"), (6031, "1")]),
("accept_twitter", "accept() twitter.json", [(5234, "4"), (5283, "1"), (5592, "4"), (5809, "4"), (5810, "2"), (5853, "2"), (6031, "1")]),
("parse_twitter_ifstream", "parse() twitter.json, std::ifstream", [(5828, "1"), (5884, "1")]),
("dump_twitter", "dump() twitter.json", [(5285, "6"), (5738, "2"), (5878, "2"), (5883, "2")]),
("dump_canada", "dump() canada.json", [(5285, "6"), (5634, "3")]),
("from_cbor_twitter", "from_cbor() twitter", [(5233, "1"), (5501, "4"), (5185, "U"), (5746, "U"), (6028, "4")]),
("to_cbor_twitter", "to_cbor() twitter", [(5328, "4"), (5824, "6"), (5885, "6")]),
]
# pull requests that were not merged yet when the timeline was measured: their step is the last point, the candidate
# (develop with the open pull requests merged); drop a number here once its pull request is on develop
PENDING = {6031}
MONTHS = [("2025-04", "3.12.0"), ("2026-09", "Sep 2026"), ("2026-10", "Oct"), ("2026-11", "Nov")]
def timeline():
rows = list(csv.DictReader((HERE / "data" / "perf_timeline.csv").open()))
n = len(rows)
W, H = 340, 270
L, R, T, B = 44, 330, 66, 208
for col, title, labels in TIMELINE:
vals = [float(r[col]) if r[col] else None for r in rows]
base = vals[0]
rel = [base / v if v else None for v in vals] # speedup over 3.12.0
hi = max(x for x in rel if x)
top = 2 ** math.ceil(math.log2(hi * 1.3))
Y = lambda s: B - math.log2(s) / math.log2(top) * (B - T)
X = lambda i: L + i / (n - 1) * (R - L)
b = ['<text class="nj-charts-panel" x="%g" y="18">%s</text>' % (8, esc(title))]
t = 1
while t <= top:
b.append('<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (L, Y(t), R, Y(t)))
b.append('<text class="nj-charts-tick nj-charts-tick--r" x="%g" y="%g">%d%s</text>' % (L - 6, Y(t) + 4, t, TIMES))
t *= 2
# month ticks: first commit of the month
seen = set()
for i, r in enumerate(rows):
m = r["date"][:7]
for key, name in MONTHS:
if m == key and key not in seen:
seen.add(key)
b.append('<line class="nj-charts-axis" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(i), B, X(i), B + 4))
b.append('<text class="nj-charts-tick" x="%g" y="%g">%s</text>' % (X(i), B + 17, name))
# a step line: each commit's value holds until the next commit
pts, prev = [], None
for i, s in enumerate(rel):
if s is None:
continue
if prev is not None:
pts.append("%.1f,%.1f" % (X(i), Y(prev)))
pts.append("%.1f,%.1f" % (X(i), Y(s)))
prev = s
b.append('<polyline class="nj-charts-json" points="%s"/>' % " ".join(pts))
# labels for named steps: a dot at the commit and its PR number above it; PRs a few commits apart share a
# label, and a label that would overlap one already placed moves up
groups = []
for pr, lab in labels:
i = next((k for k, r in enumerate(rows) if r["pr"] == str(pr)), None)
if i is None and pr in PENDING and rows[-1]["commit"] == "candidate":
i = n - 1
assert i is not None, "no commit of #%d in the timeline" % pr
if groups and X(i) - X(groups[-1][-1][1]) < 6:
groups[-1].append((pr, i, lab))
else:
groups.append([(pr, i, lab)])
# labels in two rows above the plot, each with a guide down to its dot
placed = []
for g in groups:
i = g[-1][1]
x, y = X(i), Y(rel[i])
for pr, k, lab in g:
b.append('<circle class="nj-charts-json-dot" cx="%.1f" cy="%.1f" r="3.5"><title>#%s: %s</title></circle>'
% (X(k), Y(rel[k]), pr, fx(rel[k])))
marks = list(dict.fromkeys(lab for _, _, lab in g))
w = 18 * len(marks) - 3
tx = min(max(x, L + w / 2), R - w / 2)
row = 0
while any(r == row and abs(tx - px) < (w + pw) / 2 + 4 for px, r, pw in placed):
row += 1
placed.append((tx, row, w))
ty = 46 - 18 * row # the center of the badges
b.append('<line class="nj-charts-grid" stroke-dasharray="2 2" x1="%.1f" y1="%.1f" x2="%.1f" y2="%.1f"/>' % (x, ty + 8, x, y - 5))
for k, mark in enumerate(marks):
cx = tx - w / 2 + 7.5 + 18 * k
b.append('<circle class="nj-theme-dot%s" cx="%.1f" cy="%.1f" r="7.5"/>' % ("" if mark.isdigit() else " nj-theme-dot--other", cx, ty))
b.append('<text class="nj-theme-num" x="%.1f" y="%.1f" text-anchor="middle">%s</text>' % (cx, ty + 4, mark))
b.append('<line class="nj-charts-axis" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (L, B, R, B))
b.append('<text class="nj-charts-note" x="%g" y="%g">speedup over 3.12.0 (log scale), more is better</text>' % (8, H - 8))
final = rel[-1]
desc = ("%s: speedup over 3.12.0 at each of %d commits, ending at %s. Labeled steps, by theme: %s."
% (title, n, fx(final).replace(TIMES, "x"), ", ".join(lab for _, lab in labels)))
write("perf_blog_timeline_%s.svg" % col, W, H, "nj-charts--timeline", "nj-blog-tl-" + col,
"%s: speedup over 3.12.0 by commit" % title, desc, b)
# ---------- cliffs: 3.12.0 and 3.13.0 times on a log axis ----------
# (operation, 3.12.0 ms, 3.13.0 ms), copied from the table in "Fix the algorithm first"
CLIFFS = [
("diff() 64k numbers vs []", 4237, 10.8),
("diff() 20k objects vs half", 122, 4.13),
("parse() callback, 32k objects", 1398, 12.1),
("operator< nested 24 deep", 64.4, 0.002),
("operator< citm, 10x", 284, 3.94),
("flatten() citm, ordered_json", 271, 1.45),
("to_bson() 200 deep, 100x", 20.3, 0.352),
("push_back() 100k, diagnostics", 1589, 5.32),
("at(i) 10k, diagnostics", 45.9, 0.088),
]
def cliffs():
W, L, R = 600, 250, 585
lo, hi = -3, 4 # 1 µs .. 10 s, in log10 ms
X = lambda ms: L + (math.log10(ms) - lo) / (hi - lo) * (R - L)
top, pitch = 40, 34
b, desc = [], []
axis_y = top + pitch * len(CLIFFS) - 10
for e in range(lo, hi + 1):
b.append('<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(10 ** e), top - 10, X(10 ** e), axis_y))
lab = {-3: "1 µs", -2: "10 µs", -1: "0.1 ms", 0: "1 ms", 1: "10 ms", 2: "0.1 s", 3: "1 s", 4: "10 s"}[e]
b.append('<text class="nj-charts-tick" x="%g" y="%g">%s</text>' % (X(10 ** e), axis_y + 16, lab))
b.append('<text class="nj-charts-tick" x="%g" y="%g">runtime (log scale), less is better</text>' % ((L + R) / 2, axis_y + 34))
b.append('<defs><marker id="nj-blog-cliffs-head" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="5" markerHeight="5" '
'orient="auto"><path class="nj-charts-head" d="M0 0 L10 5 L0 10 z"/></marker></defs>')
b.append('<circle class="nj-charts-ojson-dot" cx="%g" cy="14" r="5"/><text class="nj-charts-leg" x="%g" y="18.5">3.12.0</text>' % (L, L + 10))
b.append('<circle class="nj-charts-json-dot" cx="%g" cy="14" r="5"/><text class="nj-charts-leg" x="%g" y="18.5">3.13.0</text>' % (L + 80, L + 90))
for i, (op, old, new) in enumerate(CLIFFS):
y = top + i * pitch + 8
b.append('<text class="nj-charts-rowlabel" x="%g" y="%g" text-anchor="end">%s</text>' % (L - 10, y + 4, esc(op)))
# an arrow from the old time to the new one, ending just before the new dot
b.append('<line class="nj-charts-axis" x1="%g" y1="%g" x2="%g" y2="%g" marker-end="url(#nj-blog-cliffs-head)"/>'
% (X(old) - 6, y, X(new) + 7, y))
b.append('<circle class="nj-charts-ojson-dot" cx="%g" cy="%g" r="5"><title>%s, 3.12.0: %g ms</title></circle>' % (X(old), y, esc(op), old))
b.append('<circle class="nj-charts-json-dot" cx="%g" cy="%g" r="5"><title>%s, 3.13.0: %g ms</title></circle>' % (X(new), y, esc(op), new))
b.append('<text class="nj-charts-factor" x="%g" y="%g">%s</text>' % ((X(old) + X(new)) / 2, y - 7, fx(old / new)))
desc.append("%s: %g ms to %g ms" % (op, old, new))
write("perf_blog_cliffs.svg", W, axis_y + 44, "nj-charts--blog", "nj-blog-cliffs",
"Operations that grew quadratically or worse: time with 3.12.0 and 3.13.0, log scale",
"Dot plot on a logarithmic time axis, less is better; an arrow leads from each 3.12.0 time to the 3.13.0 time. " + "; ".join(desc) + ".", b)
# ---------- validating the files we didn't tune on, file by file ----------
# data/perf_heldout_validate.json: per platform, file and library the fastest fully validating way of the validate
# use case on the 19 other files of simdjson's jsonexamples (reused parsers not chosen), extracted from
# summarize.py --json of the held-out run
HELDOUT = [("mac", "Apple M1 Max", "nj-charts-json-dot"), ("x86-gcc", "x86-64, GCC 16.2", "nj-charts-ojson-dot")]
def heldout():
data = json.load((HERE / "data" / "perf_heldout_validate.json").open())
files = sorted(data["mac"])
rel, winner = {}, {}
for plat, _, _ in HELDOUT:
for f in files:
libs = data[plat][f]
# the fastest other library: below 1 json_document is the fastest, and the distance shows by how much
# json::accept() is nlohmann/json too, not another library
best = min((l for l in libs if l not in ("nlohmann json_document", "nlohmann json")), key=lambda l: libs[l]["us"])
rel[plat, f] = libs["nlohmann json_document"]["us"] / libs[best]["us"]
winner[plat, f] = UC_LIBS.get(best, best)
files.sort(key=lambda f: (rel["x86-gcc", f], rel["mac", f]))
W, L, R = 620, 262, 486
lo, hi = 0.4, 1.15
X = lambda r: L + (r - lo) / (hi - lo) * (R - L)
top, pitch = 58, 20
axis_y = top + pitch * len(files)
b, desc = [], []
for t in (0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1):
b.append('<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(t), top - 8, X(t), axis_y))
b.append('<text class="nj-charts-tick" x="%g" y="%g">%.1f%s</text>' % (X(t), axis_y + 16, t, TIMES))
b.append('<text class="nj-charts-tick" x="%g" y="%g">json&#95;document&#8217;s time / the fastest other library&#8217;s, less is better</text>' % ((L + R) / 2, axis_y + 34))
x = 8
for plat, name, cls in HELDOUT:
b.append('<circle class="%s" cx="%g" cy="14" r="5"/><text class="nj-charts-leg" x="%g" y="18.5">%s</text>' % (cls, x + 5, x + 15, esc_md(name)))
x += 30 + 7.6 * len(name)
b.append('<text class="nj-charts-tick nj-charts-tick--l" x="%g" y="%g">next on x86-64</text>' % (R + 14, top - 10))
for i, f in enumerate(files):
y = top + i * pitch + 6
b.append('<text class="nj-charts-rowlabel nj-charts-code" x="%g" y="%g" text-anchor="end">%s</text>' % (L - 10, y + 4, esc_md(f)))
for k, (plat, name, cls) in enumerate(HELDOUT):
r = rel[plat, f]
b.append('<circle class="%s" cx="%.1f" cy="%g" r="4.5"><title>%s, %s: %.2f%s the time of %s</title></circle>'
% (cls, X(max(lo, min(r, hi))), y - 3.5 + 7 * k, esc_md(f), esc_md(name), r, TIMES, esc_md(winner[plat, f])))
w = winner["x86-gcc", f]
b.append('<text class="nj-charts-tick nj-charts-tick--l%s" x="%g" y="%g">%s</text>'
% (" nj-charts-best" if rel["x86-gcc", f] > 1.0005 else "", R + 14, y + 4, esc_md(w)))
desc.append("%s: Mac %.2f, x86-64 %.2f (%s)" % (f, rel["mac", f], rel["x86-gcc", f], w))
b.append('<line class="nj-charts-ref" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(1), top - 8, X(1), axis_y))
b.append('<text class="nj-charts-tick" x="%g" y="%g">as fast as the next</text>' % (X(1), top - 14))
wins = {p: sum(rel[p, f] < 1 for f in files) for p, _, _ in HELDOUT}
print("heldout: json_document fastest on %s" % wins)
write("perf_blog_heldout.svg", W, axis_y + 44, "nj-charts--blog", "nj-blog-heldout",
"Validating 19 files 3.13.0 was not tuned on: json_document's time relative to the fastest other library per file",
"Dot plot per file, less is better; below 1.0 json_document is the fastest fully validating library. "
+ "; ".join(desc) + ".", b)
# ---------- the price: compile time of two programs against 3.12.0 ----------
# CPU time of the compiler in ms, median of 5 interleaved rounds, C++20, M1 Max (the post's appendix G)
# (3.12.0, 3.13.0, 3.13.0 with a precompiled header, 3.13.0 as a module)
PRICE = [
("Apple clang 21, -O0 (debug)", [("count_numbers", 830.8, 1131.1, 639.0, 790.3), ("server_config", 962.8, 1312.5, 774.2, 1036.5)]),
("Apple clang 21, -O2", [("count_numbers", 1328.4, 1898.4, 1311.8, 1491.2), ("server_config", 1584.1, 2251.0, 1778.7, 1925.9)]),
("GCC 16, -O0 (debug)", [("count_numbers", 1416.5, 2385.4, 1592.9, 1603.7), ("server_config", 1877.6, 2819.8, 2152.1, 2180.2)]),
("GCC 16, -O2", [("count_numbers", 2159.0, 3464.5, 2765.0, 2739.8), ("server_config", 2877.9, 4388.2, 3722.4, 3773.8)]),
]
PRICE_SERIES = [("3.13.0", "nj-charts-c2"), ("3.13.0, precompiled header", "nj-charts-c1"), ("3.13.0, module", "nj-charts-c3")]
def price():
W, L, R = 600, 150, 560
lo, hi = -50, 70
X = lambda pct: L + (pct - lo) / (hi - lo) * (R - L)
pct = lambda new, old: round((new / old - 1) * 100)
lab = lambda p: (MINUS + "%d%%" % -p) if p < 0 else "+%d%%" % p
bh, pitch, gap = 11, 14, 10
b, desc = [], []
# the key above the plot
x = 8
for name, cls in PRICE_SERIES:
b.append('<rect class="%s" x="%g" y="6" width="12" height="12" rx="3"/>' % (cls, x))
b.append('<text class="nj-charts-leg" x="%g" y="16.5">%s</text>' % (x + 18, esc(name)))
x += 18 + 8.2 * len(name) + 22
top = 54
b.append('<text class="nj-charts-tick" x="%g" y="%g">as fast as 3.12.0</text>' % (X(0), top - 8))
y = top
for build, progs in PRICE:
b.append('<text class="nj-charts-panel" x="8" y="%g">%s</text>' % (y + 14, esc(build)))
y += 24
y0, at = y, len(b)
for prog, old, *new in progs:
b.append('<text class="nj-charts-rowlabel nj-charts-code" x="%g" y="%g" text-anchor="end">%s</text>'
% (L - 8, y + 1.5 * pitch + 2, prog))
for (name, cls), t in zip(PRICE_SERIES, new):
p = pct(t, old)
b.append('<path class="%s" d="%s"><title>%s, %s, %s: %s ms against %s ms with 3.12.0 (%s)</title></path>'
% (cls, hbar(X(0), X(p), y, bh), prog, esc(build), esc(name), format(round(t), ","), format(round(old), ","), lab(p)))
if p < 0:
b.append('<text class="nj-charts-val" x="%g" y="%g" text-anchor="end">%s</text>' % (X(p) - 5, y + bh - 1.5, lab(p)))
else:
b.append('<text class="nj-charts-val" x="%g" y="%g">%s</text>' % (X(p) + 5, y + bh - 1.5, lab(p)))
desc.append("%s, %s, %s: %s" % (build, prog, name, lab(p).replace(MINUS, "-")))
y += pitch
y += gap - (pitch - bh)
# the grid behind this panel's bars only, so that it doesn't cross the panel titles
b[at:at] = ['<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(t), y0 - 4, X(t), y - gap + 4)
for t in range(lo + 10, hi + 1, 20) if t]
y += 8
axis_y = y
b.append('<line class="nj-charts-ref" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(0), top - 2, X(0), axis_y))
for t in range(lo + 10, hi + 1, 20):
b.append('<text class="nj-charts-tick" x="%g" y="%g">%s</text>' % (X(t), axis_y + 16, "0" if t == 0 else lab(t)))
b.append('<text class="nj-charts-tick" x="%g" y="%g">compile time compared with 3.12.0, less is better</text>' % ((L + R) / 2, axis_y + 34))
write("perf_blog_price.svg", W, axis_y + 44, "nj-charts--blog", "nj-blog-price",
"Compile time of two programs with 3.13.0, alone, with a precompiled header and as a module, compared with 3.12.0",
"Horizontal bars of the change in compile time against 3.12.0, less is better. " + "; ".join(desc) + ".", b)
# ---------- use cases: libraries x use cases, relative time ----------
# data/perf_usecases_<platform>.json is written by tests/benchmarks/json_view/others/summarize.py --json
UC_FILES = ["twitter", "citm_catalog", "canada", "jeopardy"]
USE_CASES = [("validate", "validate"), ("sum", "sum"), ("select", "select"),
("edit", "edit"), ("minify", "minify"), ("write", "write")]
UC_LIBS = { # library in the JSON -> row label
"nlohmann json_document": "nlohmann/json json_document", "nlohmann json": "nlohmann/json json",
"yyjson": "yyjson", "simdjson": "simdjson", "sonic-cpp": "sonic-cpp", "Glaze": "Glaze", "Boost.JSON": "Boost.JSON",
"RapidJSON": "RapidJSON", "sonic-rs": "sonic-rs (Rust)", "simd-json": "simd-json (Rust)", "serde_json": "serde_json (Rust)",
}
UC_PLATFORMS = [("mac", "Use cases: time of each library relative to the fastest, Apple M1 Max"),
("x86-gcc", "Use cases: time of each library relative to the fastest, x86-64 with GCC 16.2"),
("x86-gcc13", "Use cases: time of each library relative to the fastest, x86-64 with GCC 13"),
("x86-clang", "Use cases: time of each library relative to the fastest, x86-64 with Clang 23")]
LEVEL_MARK = {"no UTF-8": "U", "partial": "P", "full": ""}
# why a cell is empty (the tooltips of the n/a cells)
NA = {("simdjson", "edit"): "simdjson's documents are read-only: it has no API to change a value and write the result"}
def geomean(xs):
return math.exp(sum(math.log(x) for x in xs) / len(xs))
WRITING = ("edit", "minify", "write") # the use cases that write numbers
NUMBER_TEXT = ("source numbers", "raw numbers") # variants that write each number by copying its text
def normalize_usecases(data):
"""Chooses each library's best variants again with the rules of the post: variants that reuse a parser or document
across calls, and in-place variants whose copy of the input is made before the timer starts ("(copy untimed)"), are
measured but not chosen. Variants that write each number by copying its text instead of formatting
it (json_document's number_format::source, yyjson's and RapidJSON's raw numbers in edit, minify and write) are not
chosen as the fully validating way, but as a way that does less, marked "N" like "U" and "P". Skipping the number
conversion while reading is allowed. Each pick has a "mark": "", or the letters of what it skips"""
data = json.loads(json.dumps(data))
rank = {"full": 0, "n/a": 0, "no UTF-8": 1, "partial": 2}
for uc, files in data.items():
numtext = lambda k: uc in WRITING and any(w in k for w in NUMBER_TEXT)
for cell in files.values():
for e in cell.values():
vs = [(v["us"], k, v["level"]) for k, v in e["variants"].items() if "reused" not in k and "copy untimed" not in k]
full = [v for v in vs if rank[v[2]] == 0 and not numtext(v[1])]
pick = lambda v: {"us": v[0], "variant": v[1], "level": "full" if rank[v[2]] == 0 else v[2],
"mark": " ".join(m for m in (LEVEL_MARK.get(v[2], ""), "N" if numtext(v[1]) else "") if m)}
e["best"] = pick(min(full)) if full else None
e["best_any"] = pick(min(vs))
return data
FILE_NAMES = {"twitter": "twitter.json", "citm_catalog": "citm_catalog.json", "canada": "canada.json",
"jeopardy": "jeopardy.json"}
# what a variant that checks less skips, worded as the trade it is (the tooltips of the heatmaps)
CHECKS_LESS = [
("simdjson", "On-Demand", "reads lazily: On-Demand reads only what you ask for and steps over the rest by matching brackets"),
("simdjson", "minify", "simdjson::minify() only removes whitespace, without parsing the values"),
("Glaze", "lazy_json", "reads lazily: lazy_json reads only what you ask for and steps over the rest"),
("Glaze", "minify_json", "minify_json only removes whitespace, without parsing the values"),
("Glaze", "generic", "accepts trailing garbage after the value: Glaze's default (validate_trailing_whitespace checks it)"),
("Glaze", "structs", "reads into structs and steps over fields it doesn't know without checking them "
"(validate_skipped checks them too)"),
("RapidJSON", "", "trusts UTF-8: RapidJSON's default (kParseValidateEncodingFlag checks it)"),
("sonic-cpp", "", "trusts UTF-8: sonic-cpp 1.0.2 doesn't check it"),
("serde_json", "", "trusts UTF-8 in the strings it skips (from_slice); strings it reads are checked"),
]
# what a variant that copies number text does (the "N" half of edit, minify and write)
NUMBER_TEXT_TIPS = {
"nlohmann json_document": "copies each number's text instead of formatting it (number_format::source)",
"yyjson": "copies each number's text instead of formatting it (YYJSON_READ_NUMBER_AS_RAW)",
"RapidJSON": "copies each number's text instead of formatting it (kParseNumbersAsStringsFlag)",
}
def checks_less(lib, variant):
for l, v, text in CHECKS_LESS:
if l == lib and v in variant:
return text
return "checks less"
def usecase_table(data):
"""{library: {use case: cell}}: per library the geometric mean over UC_FILES of its fastest fully validating time
("full") and of its fastest time at any level ("alt", only if it is at least 3 % faster), each divided by the best
such fully validating mean in the use case, so that every file counts equally and the fastest library is 1.00"""
out = {}
data = normalize_usecases(data)
for uc, _ in USE_CASES:
files = data.get(uc, {})
if not files:
continue
cells = {}
for lib in UC_LIBS:
es = [files.get(f, {}).get(lib) for f in UC_FILES]
if not all(es):
continue
full = [e["best"] for e in es]
alt = [e["best_any"] for e in es]
cells[lib] = {"full": geomean([b["us"] for b in full]) if all(full) else None, "alt": geomean([a["us"] for a in alt]),
"files": [(f, b, a) for f, b, a in zip(UC_FILES, full, alt)]}
ref = min(c["full"] for c in cells.values() if c["full"])
for lib, c in cells.items():
full = c["full"] / ref if c["full"] else None
alt = c["alt"] / ref
if full is not None and alt > full * 0.97:
alt = None
levels = {a["level"] for _, _, a in c["files"]} if alt is not None else set()
level = "partial" if "partial" in levels else "no UTF-8" if "no UTF-8" in levels else "full"
numtext = alt is not None and any("N" in a["mark"].split() for _, _, a in c["files"])
marks = " ".join(m for m in (LEVEL_MARK[level], "N" if numtext else "") if m)
out.setdefault(lib, {})[uc] = {"full": full, "alt": alt, "level": level, "marks": marks, "files": c["files"]}
return out
# cell colors: green for the fastest, gray around twice the time, red for the slowest; the upper bounds of the steps
HEAT_STEPS = [1.15, 1.5, 2.5, 5, float("inf")]
HEAT_LABELS = ["below 1.15", "1.15 to 1.5", "1.5 to 2.5", "2.5 to 5", "5 and more"]
def heat(r):
return next(i for i, b in enumerate(HEAT_STEPS) if r < b)
def fr(r):
return "%.2f" % r if r < 9.995 else "%.1f" % r if r < 99.95 else "%.0f" % r
def fus(us):
return "{:,.0f} µs".format(us) if us >= 100 else "%.1f µs" % us
def tip(lib, uc_label, c, half):
"""the tooltip of a cell: lines separated by newlines (&#10; in the attribute), the first one the heading"""
if half == "full":
lines = ["%s · %s" % (UC_LIBS[lib], uc_label),
"%s× the time of the fastest library (fully validating)" % fr(c["full"])]
picks = [(f, b) for f, b, _ in c["files"]]
else:
lines = ["%s · %s, checking less" % (UC_LIBS[lib], uc_label),
"%s× the time of the fastest fully validating library" % fr(c["alt"])]
picks = [(f, a) for f, _, a in c["files"]]
ways = sorted({e["variant"] for _, e in picks})
if len(ways) == 1:
lines.append("way: %s" % ways[0])
for f, e in picks:
lines.append("%s: %s%s%s" % (FILE_NAMES[f], fus(e["us"]), "" if len(ways) == 1 else " · " + e["variant"],
" (validates fully)" if half == "alt" and e["level"] == "full" else ""))
if half == "alt":
seen = []
for _, e in picks:
ts = ([checks_less(lib, e["variant"])] if e["level"] != "full" else []) + \
([NUMBER_TEXT_TIPS.get(lib, "copies each number's text instead of formatting it")] if "N" in e["mark"].split() else [])
for t in ts:
if t not in seen:
seen.append(t)
lines += seen
if any("(copy)" in e["variant"] for _, e in picks):
lines.append("(copy): parses in place, on a copy of the input that is part of the time")
return "&#10;".join(lines)
def heatmap(platform, title):
data = json.load((HERE / "data" / ("perf_usecases_%s.json" % platform)).open())
t = usecase_table(data)
libs = [l for l in UC_LIBS if l in t]
score = lambda l: geomean([v["full"] or v["alt"] for v in t[l].values()]) # the mean of the row as shown
libs.sort(key=score)
W, L, cw, ch, top = 784, 224, 92, 36, 44
b, desc = [], []
for j, (uc, label) in enumerate(USE_CASES):
b.append('<text class="nj-charts-tick" x="%g" y="%g">%s</text>' % (L + j * cw + cw / 2, top - 10, esc(label)))
for i, lib in enumerate(libs):
y = top + i * ch
cls = "nj-charts-name-json" if lib.startswith("nlohmann") else ""
b.append('<text class="nj-charts-rowlabel %s" x="%g" y="%g" text-anchor="end">%s</text>' % (cls, L - 8, y + ch / 2 + 4, esc(UC_LIBS[lib])))
for j, (uc, label) in enumerate(USE_CASES):
x = L + j * cw
c = t[lib].get(uc)
if c is None:
b.append('<g class="nj-heat-cell" tabindex="0" data-tip="%s">' % esc("%s · %s&#10;%s" % (UC_LIBS[lib], label, NA.get((lib, uc), "the library has no API for this use case"))))
b.append('<rect class="nj-heat-na" x="%g" y="%g" width="%g" height="%g" rx="3"/>' % (x + 1, y + 1, cw - 2, ch - 2))
b.append('<text class="nj-charts-tick" x="%g" y="%g">n/a</text>' % (x + cw / 2, y + ch / 2 + 4))
b.append('</g>')
desc.append("%s %s: n/a" % (UC_LIBS[lib], label))
continue
halves = []
if c["full"] is not None:
halves.append(("full", c["full"]))
if c["alt"] is not None:
halves.append(("alt", c["alt"]))
hw = (cw - 2) / len(halves)
for k, (half, r) in enumerate(halves):
hx = x + 1 + k * hw
gap = 1 if len(halves) == 2 else 0
b.append('<g class="nj-heat-cell" tabindex="0" data-tip="%s">' % esc(tip(lib, label, c, half)))
b.append('<rect class="nj-heat-%d" x="%g" y="%g" width="%g" height="%g" rx="3"/>'
% (heat(r), hx + (gap if k else 0), y + 1, hw - gap, ch - 2))
cx = hx + hw / 2
if half == "alt":
b.append('<text class="nj-charts-cell" x="%g" y="%g" text-anchor="middle">%s</text>' % (cx, y + 16, fr(r)))
b.append('<text class="nj-charts-cell nj-charts-cell--small" x="%g" y="%g" text-anchor="middle">%s</text>'
% (cx, y + 29, c["marks"]))
else:
b.append('<text class="nj-charts-cell" x="%g" y="%g" text-anchor="middle">%s</text>' % (cx, y + ch / 2 + 4, fr(r)))
b.append('</g>')
if c["full"] is None: # no fully validating way: the left half stays empty
pass
desc.append("%s %s: %s%s" % (UC_LIBS[lib], label, fr(c["full"]) if c["full"] else "no fully validating way",
(" (%s doing less, %s)" % (fr(c["alt"]), c["marks"])) if c["alt"] else ""))
# the key, set apart from the grid and narrower than its columns, so that it doesn't read as a row of it
yb = top + len(libs) * ch + 28
b.append('<text class="nj-charts-tick nj-charts-tick--l" x="8" y="%g">time relative to the fastest fully validating library, less is better</text>' % (yb + 4))
kw, ky = 76, yb + 14
for i, lab in enumerate(HEAT_LABELS):
# each swatch in its own group, so that the ink rule for the strong steps (a sibling selector) stays inside it
b.append('<g><rect class="nj-heat-%d" x="%g" y="%g" width="%g" height="20" rx="3"/>' % (i, 8 + i * (kw + 4), ky, kw))
b.append('<text class="nj-charts-cell nj-charts-cell--small" x="%g" y="%g" text-anchor="middle">%s</text></g>' % (8 + i * (kw + 4) + kw / 2, ky + 14, esc(lab)))
nx = 8 + len(HEAT_LABELS) * (kw + 4) + 12
b.append('<rect class="nj-heat-na" x="%g" y="%g" width="%g" height="20" rx="3"/>' % (nx, ky, 40))
b.append('<text class="nj-charts-tick" x="%g" y="%g">n/a</text>' % (nx + 20, ky + 14))
b.append('<text class="nj-charts-tick nj-charts-tick--l" x="%g" y="%g">no API for it</text>' % (nx + 48, ky + 14))
write("perf_blog_usecases_%s.svg" % platform, W, ky + 28, "nj-charts--blog nj-charts--heat", "nj-blog-uc-" + platform, title,
"Table of relative times, libraries by use case. " + "; ".join(desc) + ".", b)
if __name__ == "__main__":
swar()
overlap()
digits()
heldout()
if OVERVIEW:
overview()
distribution()
if TIMELINE:
timeline()
if CLIFFS:
cliffs()
price()
for platform, title in UC_PLATFORMS:
if (HERE / "data" / ("perf_usecases_%s.json" % platform)).exists():
heatmap(platform, title)
docs/mkdocs/scripts/figures/perf_blog_tables.py
+66
View File
@@ -0,0 +1,66 @@
"""Prints the tables of Appendix E of home/blog/how_3_13_0_got_faster.md (comparison with other libraries) as Markdown,
from data/perf_usecases_<platform>.json, which tests/benchmarks/json_view/others/summarize.py --json writes.
Usage: python3 scripts/figures/perf_blog_tables.py <platform> [title]
"""
import json
import sys
from pathlib import Path
from perf_blog import normalize_usecases
HERE = Path(__file__).resolve().parent
FILES = [("twitter", "`twitter.json`"), ("citm_catalog", "`citm_catalog.json`"), ("canada", "`canada.json`"),
("jeopardy", "`jeopardy.json`"), ("status", "one status (2.5 KB)")]
USE_CASES = [("validate", "validate"), ("sum", "sum"), ("select", "select"), ("edit", "edit"), ("minify", "minify"),
("write", "write")]
NAMES = {"nlohmann json_document": "nlohmann/json `json_document`", "nlohmann json": "nlohmann/json `json`",
"sonic-rs": "sonic-rs (Rust)", "simd-json": "simd-json (Rust)", "serde_json": "serde_json (Rust)"}
def fmt(us):
if us >= 10000:
return "{:,.0f}".format(us)
if us >= 100:
return "{:,.0f}".format(us)
return "%.1f" % us
def table(data, uc, indent):
files = [f for f, _ in FILES if f in data.get(uc, {})]
libs = list(data[uc][files[0]].keys())
jd = lambda f: data[uc][f]["nlohmann json_document"]["best"]["us"]
libs.sort(key=lambda l: sum(((data[uc][f][l]["best"] or data[uc][f][l]["best_any"])["us"] / jd(f)) for f in files))
head = "| library | variant | " + " | ".join(n for f, n in FILES if f in files) + " |"
rows = [head, "| --- | --- | " + " | ".join("--:" for _ in files) + " |"]
for lib in libs:
best = [data[uc][f][lib]["best"] for f in files]
anyv = [data[uc][f][lib]["best_any"] for f in files]
names = sorted({b["variant"] for b in best if b} | {a["variant"] + " [%s]" % a["mark"] for b, a in zip(best, anyv) if a["mark"] and (not b or a["us"] < b["us"])})
cells = []
for b, a in zip(best, anyv):
c = fmt(b["us"]) if b else "–"
if a["mark"] and (not b or a["us"] < b["us"] * 0.97):
c += " (%s %s)" % (a["mark"], fmt(a["us"]))
cells.append(c)
bold = "**%s**" if lib == "nlohmann json_document" else "%s"
rows.append("| %s | %s | %s |" % (bold % NAMES.get(lib, lib), ", ".join(names), " | ".join(cells)))
return "\n".join(indent + r for r in rows)
def main():
platform = sys.argv[1]
data = json.load((HERE / "data" / ("perf_usecases_%s.json" % platform)).open())
data = normalize_usecases(data) # the same choices as the figure
out = []
for uc, label in USE_CASES:
if uc not in data:
continue
out.append("**%s**\n" % label)
out.append(table(data, uc, ""))
out.append("")
print("\n".join(out))
if __name__ == "__main__":
main()
include/nlohmann/detail/input/binary_reader.hpp
+90 -57
View File
@@ -344,8 +344,8 @@ class binary_reader
nested document could declare a length that disagrees with where its
terminator actually falls and quietly hand the bytes in between to the
enclosing document. A well-formed document is at least 5 bytes (the prefix
plus the terminator); the equality also rejects those impossible sizes,
since at least 5 bytes are always consumed.
plus the terminator); open_bson_document() rejects a smaller size before
it is stored, so @a document_size is never negative here.
@param[in] document_start value of chars_read before the size prefix
@param[in] document_size the declared document size
@@ -353,7 +353,7 @@ class binary_reader
*/
bool check_bson_document_size(const std::size_t document_start, const std::int32_t document_size)
{
if (JSON_HEDLEY_UNLIKELY(document_size < 0 || static_cast<std::size_t>(document_size) != chars_read - document_start))
if (JSON_HEDLEY_UNLIKELY(static_cast<std::size_t>(document_size) != chars_read - document_start))
{
return bson_document_size_error(document_size, chars_read - document_start);
}
@@ -1024,7 +1024,7 @@ class binary_reader
{
std::uint64_t len{};
std::size_t size{};
return get_cbor_argument(len) && get_cbor_container_size(len, size, "array") && enter_cbor_array(size);
return get_cbor_argument(len) && get_container_size(len, size, "array") && enter_cbor_array(size);
}
case 0x9F: // array (indefinite length)
@@ -1064,7 +1064,7 @@ class binary_reader
{
std::uint64_t len{};
std::size_t size{};
return get_cbor_argument(len) && get_cbor_container_size(len, size, "map") && enter_object(size);
return get_cbor_argument(len) && get_container_size(len, size, "map") && enter_object(size);
}
case 0xBF: // map (indefinite length)
@@ -1700,7 +1700,7 @@ class binary_reader
}
/*!
@brief narrow a definite CBOR array/map length to std::size_t
@brief narrow a definite CBOR or MessagePack array/map length to std::size_t
A definite length is rejected if it does not fit in std::size_t or if it
equals detail::unknown_size(), which is reserved to mark an indefinite-
@@ -1713,7 +1713,7 @@ class binary_reader
@param[in] context "array" or "map", for the error message
@return whether the length is usable
*/
bool get_cbor_container_size(const std::uint64_t len, std::size_t& result, const char* context)
bool get_container_size(const std::uint64_t len, std::size_t& result, const char* context)
{
if (JSON_HEDLEY_UNLIKELY(!value_in_range_of<std::size_t>(len) || len == detail::unknown_size()))
{
@@ -2309,7 +2309,8 @@ class binary_reader
case 0xDD: // array 32
{
std::uint32_t len{};
return get_number(len) && enter_msgpack_array(conditional_static_cast<std::size_t>(len));
std::size_t size{};
return get_number(len) && get_container_size(len, size, "array") && enter_msgpack_array(size);
}
case 0xDE: // map 16
@@ -2321,7 +2322,8 @@ class binary_reader
case 0xDF: // map 32
{
std::uint32_t len{};
return get_number(len) && enter_object(conditional_static_cast<std::size_t>(len));
std::size_t size{};
return get_number(len) && get_container_size(len, size, "map") && enter_object(size);
}
// negative fixint
@@ -3092,16 +3094,13 @@ class binary_reader
{
if (size_and_type.second != 0)
{
if (size_and_type.second != 'N')
for (std::size_t i = 0; i < size_and_type.first; ++i)
{
for (std::size_t i = 0; i < size_and_type.first; ++i)
if (JSON_HEDLEY_UNLIKELY(!get_ubjson_size_value(dimlen, no_ndarray, size_and_type.second)))
{
if (JSON_HEDLEY_UNLIKELY(!get_ubjson_size_value(dimlen, no_ndarray, size_and_type.second)))
{
return false;
}
dim.push_back(dimlen);
return false;
}
dim.push_back(dimlen);
}
}
else
@@ -3131,6 +3130,27 @@ class binary_reader
return true;
}
/*!
@brief store the count of an optimized container (or the length of a string)
A count equal to npos is rejected: npos marks a container whose count is
not known, so a count of that value would be read as "no count" (compare
get_container_size()). No container can hold that many elements.
@param[in] count the count read from the input
@param[out] result set to @a count unless it is rejected
@return whether @a count is usable
*/
bool store_ubjson_count(const std::size_t count, std::size_t& result)
{
if (JSON_HEDLEY_UNLIKELY(count == npos))
{
return out_of_range_error(exception_id::container_too_large, "integer value overflow", "size");
}
result = count;
return true;
}
/*!
@brief read a UBJSON/BJData optimized-container count of a signed marker
type ('i', 'I', 'l', 'L') and narrow it to std::size_t
@@ -3161,8 +3181,7 @@ class binary_reader
{
return out_of_range_error(exception_id::container_too_large, "integer value overflow", "size");
}
result = static_cast<std::size_t>(number); // NOLINT(bugprone-signed-char-misuse,cert-str34-c): number is not a char
return true;
return store_ubjson_count(static_cast<std::size_t>(number), result); // NOLINT(bugprone-signed-char-misuse,cert-str34-c): number is not a char
}
/*!
@@ -3239,8 +3258,7 @@ class binary_reader
{
return false;
}
result = conditional_static_cast<std::size_t>(number);
return true;
return store_ubjson_count(conditional_static_cast<std::size_t>(number), result);
}
case 'M':
@@ -3258,8 +3276,7 @@ class binary_reader
{
return out_of_range_error(exception_id::container_too_large, "integer value overflow", "size");
}
result = detail::conditional_static_cast<std::size_t>(number);
return true;
return store_ubjson_count(detail::conditional_static_cast<std::size_t>(number), result);
}
case '[':
@@ -3303,11 +3320,9 @@ class binary_reader
// follow the documented _ArrayType_, _ArraySize_, _ArrayData_ order
if (ndarray_dtype != 0)
{
// every optimized type marker is_valid_optimized_type() accepts for BJData has a name
const char* type_name = bjd_type_name(ndarray_dtype);
if (JSON_HEDLEY_UNLIKELY(type_name == nullptr))
{
return unexpected_byte("invalid byte", "type");
}
JSON_ASSERT(type_name != nullptr);
string_t type_key = "_ArrayType_";
string_t type = type_name; // sax->string() takes a reference
@@ -3390,12 +3405,6 @@ class binary_reader
if (current == '$')
{
result.second = get(); // must not ignore 'N', because 'N' maybe the type
if (input_format == input_format_t::bjdata
&& JSON_HEDLEY_UNLIKELY(is_bjd_excluded_optimized_type(result.second)))
{
return optimized_type_error();
}
if (JSON_HEDLEY_UNLIKELY(!unexpect_eof("type")))
{
return false;
@@ -3423,7 +3432,7 @@ class binary_reader
// an ndarray was read here only if the flag flipped; when it was
// seeded true, get_ubjson_size_value() already rejected the nested
// dimension vector
if (input_format == input_format_t::bjdata && is_ndarray && !inside_ndarray)
if (is_ndarray && !inside_ndarray)
{
result.second |= (1 << 8); // use bit 8 to indicate ndarray, all UBJSON and BJData markers should be ASCII letters
}
@@ -3433,7 +3442,7 @@ class binary_reader
if (current == '#')
{
const bool is_error = get_ubjson_size_value(result.first, is_ndarray);
if (input_format == input_format_t::bjdata && is_ndarray && !inside_ndarray)
if (is_ndarray && !inside_ndarray)
{
return last_byte_error(exception_id::unexpected_byte, "ndarray requires both type and size", "size");
}
@@ -3607,7 +3616,6 @@ class binary_reader
JSON_HEDLEY_NEVER_INLINE
bool parse_ubjson_typed_run(std::size_t& remaining, const char_int_type type, std::true_type /*bulk*/)
{
const bool bjdata = input_format == input_format_t::bjdata;
switch (type)
{
case 'U':
@@ -3621,11 +3629,11 @@ class binary_reader
case 'L':
return parse_ubjson_typed_run<std::int64_t>(remaining);
case 'u':
return !bjdata || parse_ubjson_typed_run<std::uint16_t>(remaining);
return parse_ubjson_typed_run<std::uint16_t>(remaining);
case 'm':
return !bjdata || parse_ubjson_typed_run<std::uint32_t>(remaining);
return parse_ubjson_typed_run<std::uint32_t>(remaining);
case 'M':
return !bjdata || parse_ubjson_typed_run<std::uint64_t>(remaining);
return parse_ubjson_typed_run<std::uint64_t>(remaining);
case 'd':
return parse_ubjson_typed_run<float>(remaining);
case 'D':
@@ -3706,7 +3714,7 @@ class binary_reader
// if bit-8 of size_and_type.second is set to 1, encode bjdata ndarray as an object in JData annotated array format (https://github.com/NeuroJSON/jdata):
// {"_ArrayType_" : "typeid", "_ArraySize_" : [n1, n2, ...], "_ArrayData_" : [v1, v2, ...]}
if (input_format == input_format_t::bjdata && size_and_type.first != npos && (size_and_type.second & (1 << 8)) != 0)
if ((size_and_type.second & (1 << 8)) != 0)
{
size_and_type.second &= ~(static_cast<char_int_type>(1) << 8); // use bit 8 to indicate ndarray, here we remove the bit to restore the type marker
@@ -3765,7 +3773,7 @@ class binary_reader
}
// If BJData type marker is 'B' decode as binary
if (input_format == input_format_t::bjdata && size_and_type.first != npos && size_and_type.second == 'B')
if (size_and_type.first != npos && size_and_type.second == 'B')
{
binary_t result;
return get_binary(size_and_type.first, result) && sax->binary(result);
@@ -3814,7 +3822,7 @@ class binary_reader
}
// do not accept ND-array size in objects in BJData
if (input_format == input_format_t::bjdata && size_and_type.first != npos && (size_and_type.second & (1 << 8)) != 0)
if ((size_and_type.second & (1 << 8)) != 0)
{
return last_byte_error(exception_id::unexpected_byte, "BJData object does not support ND-array size in optimized format", "object");
}
@@ -4879,6 +4887,14 @@ class binary_reader
const char* context,
ContainerType& result)
{
// a string that is in the block of input as a whole is appended from
// it, without the zero-filling resize() below
constexpr bool from_block = bulk_scan && std::is_same<ContainerType, string_t>::value;
if (append_from_block(len, result, std::integral_constant<bool, from_block> {}))
{
return true;
}
// upper bound on the number of bytes read (and allocated) per chunk
constexpr std::size_t chunk_size = 4096;
@@ -4915,6 +4931,36 @@ class binary_reader
return true;
}
/// append the @a len bytes at the current position to @a result, if the
/// input holds them in one block; false (with nothing read) otherwise
template<typename NumberType>
bool append_from_block(const NumberType len, string_t& result, std::true_type /*block*/)
{
if (len <= 0)
{
return false;
}
// (len > 0, so the unsigned type holds it; casting a signed char
// straight to std::size_t would trip bugprone-signed-char-misuse)
const auto ulen = static_cast<typename std::make_unsigned<NumberType>::type>(len);
const std::size_t remaining = ia.bulk_remaining();
if (static_cast<std::uintmax_t>(ulen) > static_cast<std::uintmax_t>(remaining))
{
return false; // (the loop reports the premature end)
}
const auto n = static_cast<std::size_t>(ulen);
result.append(reinterpret_cast<const typename string_t::value_type*>(ia.bulk_data()), n);
ia.bulk_skip(n);
chars_read += n;
return true;
}
template<typename NumberType, typename ContainerType>
static bool append_from_block(const NumberType /*len*/, ContainerType& /*result*/, std::false_type /*block*/) noexcept
{
return false;
}
/*!
@param[in] context further context information (for diagnostics)
@return whether the last read character is not EOF
@@ -5095,8 +5141,9 @@ class binary_reader
JSON_PRIVATE_UNLESS_TESTED:
/*!
@brief check whether @a marker is a type marker that may follow '$'
UBJSON: Z N T F i U I l L d D H C S [ {; BJData: the numeric markers and C
(BJData's excluded markers are rejected separately).
UBJSON: Z N T F i U I l L d D H C S [ {; BJData: the numeric markers and C.
The markers BJData excludes (F H N S T Z [ {) are the ones
binary_writer::is_bjdata_excluded_type_marker() lists; keep the two in sync.
*/
bool is_valid_optimized_type(const char_int_type marker) const noexcept
{
@@ -5131,20 +5178,6 @@ class binary_reader
}
}
/*!
@brief whether @a marker is excluded from BJData's optimized ND-array types
@return whether @a marker is one of 'F', 'H', 'N', 'S', 'T', 'Z', '[', '{'
Mirrors binary_writer's @ref binary_writer::is_bjdata_excluded_type_marker
"is_bjdata_excluded_type_marker()`, which encodes the same list the other
way; keep the two in sync.
*/
static constexpr bool is_bjd_excluded_optimized_type(const char_int_type marker) noexcept
{
return marker == '[' || marker == '{' || marker == 'S' || marker == 'H'
|| marker == 'T' || marker == 'F' || marker == 'N' || marker == 'Z';
}
/*!
@brief look up the ND-array element type name for a BJData dtype marker
@return the type name ("uint8", "int8", ...), or nullptr if @a marker does
include/nlohmann/detail/input/input_adapters.hpp
+177 -2
View File
@@ -58,6 +58,19 @@
#define JSON_UNLOCKED_FILE_IO 0
#endif
#undef JSON_UNLOCKED_FILE_IO_MSAN
// Whether file_input_adapter scans the buffer of the FILE directly, as
// getc_unlocked() reads it: the fields it uses are those that the C
// library's own getc_unlocked() macro uses (glibc: _IO_read_ptr and
// _IO_read_end; Apple: _p and _r). It needs the file locked for the whole
// parse, as JSON_UNLOCKED_FILE_IO == 1 has it (so JSON_DISABLE_UNLOCKED_FILE_IO
// and MemorySanitizer builds turn it off).
// (uClibc defines __GLIBC__ as well, but its FILE has other fields)
#if JSON_UNLOCKED_FILE_IO == 1 && ((defined(__GLIBC__) && !defined(__UCLIBC__)) || defined(__APPLE__))
#define JSON_FILE_WINDOW 1
#else
#define JSON_FILE_WINDOW 0
#endif
#endif // JSON_NO_IO
NLOHMANN_JSON_NAMESPACE_BEGIN
@@ -179,8 +192,12 @@ class token_carry_buffer
char* m_capacity_end = nullptr;
};
/*!
Input adapter for stdio file access. This adapter read only 1 byte and do not use any
buffer. This adapter is a very low level adapter.
Input adapter for stdio file access. The file is locked for the lifetime of the
adapter and read with the unlocked stdio functions (see
JSON_DISABLE_UNLOCKED_FILE_IO). With glibc and the Apple C library, the
characters in the buffer of the FILE are also scanned in bulk, as the get area
of a stream is (see input_stream_adapter): exactly the characters getc_unlocked()
would return are consumed, so the file is left where it was left before.
*/
class file_input_adapter
{
@@ -199,6 +216,12 @@ class file_input_adapter
file_input_adapter(const file_input_adapter&) = delete;
file_input_adapter(file_input_adapter&& rhs) noexcept
: m_file(rhs.m_file)
#if JSON_FILE_WINDOW
, token_carry(std::move(rhs.token_carry))
, token_segment(rhs.token_segment)
, current_in_buffer(rhs.current_in_buffer)
, tracking_token(rhs.tracking_token)
#endif
{
// the lock is owned by the thread, not the adapter: hand it over
rhs.m_file = nullptr;
@@ -210,6 +233,20 @@ class file_input_adapter
unlock();
}
#if JSON_FILE_WINDOW
std::char_traits<char>::int_type get_character()
{
// what getc_unlocked() does, while the buffer has characters
const char* const next = buffer_ptr();
if (JSON_HEDLEY_LIKELY(next != buffer_end()))
{
current_in_buffer = true;
buffer_bump(1);
return std::char_traits<char>::to_int_type(*next);
}
return get_character_slow();
}
#else
std::char_traits<char>::int_type get_character() noexcept
{
// the file is locked for the lifetime of the adapter, so the
@@ -222,6 +259,7 @@ class file_input_adapter
return std::fgetc(m_file);
#endif
}
#endif
// returns the number of characters successfully read
template<class T>
@@ -230,7 +268,134 @@ class file_input_adapter
return fread(dest, 1, sizeof(T) * count, m_file);
}
#if JSON_FILE_WINDOW
// The lexer may scan the buffer of the FILE directly, as the window of
// input_stream_adapter: the buffer ends wherever the C library's buffer
// ends, and is refilled by the next get_character().
static constexpr bool supports_bulk_scan = true;
static constexpr bool bulk_window = true;
// Pointer to the next unread character; only valid when bulk_remaining() > 0.
const char* bulk_data() const
{
return buffer_ptr();
}
// Number of unread characters in the buffer.
std::size_t bulk_remaining() const
{
if (!current_in_buffer)
{
return 0;
}
return static_cast<std::size_t>(buffer_end() - buffer_ptr());
}
// Consume @a n characters previously inspected via bulk_data().
void bulk_skip(std::size_t n)
{
JSON_ASSERT(n <= bulk_remaining());
buffer_bump(n);
}
// The adapter keeps the current token for the lexer's error messages, as
// input_stream_adapter does.
static constexpr bool supports_token_tracking = true;
void begin_token() noexcept
{
tracking_token = true;
token_carry.clear();
token_segment = buffer_ptr();
}
void mark_token_start(std::char_traits<char>::int_type c)
{
tracking_token = true;
token_carry.clear();
if (current_in_buffer)
{
token_segment = buffer_ptr() - 1;
}
else
{
token_segment = nullptr;
token_carry.push_back(std::char_traits<char>::to_char_type(c));
}
}
void copy_token(std::vector<char>& out, bool drop_last) const
{
token_carry.copy_to(out);
if (token_segment != nullptr)
{
out.insert(out.end(), token_segment, buffer_ptr());
}
if (drop_last && !out.empty())
{
out.pop_back();
}
}
#endif
private:
#if JSON_FILE_WINDOW
// the buffer of the FILE: [buffer_ptr(), buffer_end()) are the characters
// getc_unlocked() would return next
#if defined(__GLIBC__)
const char* buffer_ptr() const noexcept
{
return m_file->_IO_read_ptr;
}
const char* buffer_end() const noexcept
{
return m_file->_IO_read_end;
}
void buffer_bump(std::size_t n) noexcept
{
m_file->_IO_read_ptr += n;
}
#else
const char* buffer_ptr() const noexcept
{
return reinterpret_cast<const char*>(m_file->_p);
}
const char* buffer_end() const noexcept
{
return m_file->_r > 0 ? reinterpret_cast<const char*>(m_file->_p) + m_file->_r : reinterpret_cast<const char*>(m_file->_p);
}
void buffer_bump(std::size_t n) noexcept
{
m_file->_p += n;
m_file->_r -= static_cast<int>(n);
}
#endif
// the buffer is exhausted: getc_unlocked() refills it
JSON_HEDLEY_NEVER_INLINE std::char_traits<char>::int_type get_character_slow()
{
if (token_segment != nullptr)
{
token_carry.append(token_segment, buffer_end());
token_segment = nullptr;
}
const auto res = getc_unlocked(m_file);
if (res == EOF)
{
current_in_buffer = false;
return std::char_traits<char>::eof();
}
// the character was taken from the refilled buffer, at buffer_ptr() - 1
current_in_buffer = true;
if (tracking_token)
{
token_segment = buffer_ptr() - 1;
}
return res;
}
#endif
// Lock the file once for the whole parse instead of once per character.
// The lock is recursive, so fread() and the user's own stdio calls on the
// same thread keep working.
@@ -259,6 +424,16 @@ class file_input_adapter
/// the file pointer to read from
std::FILE* m_file;
#if JSON_FILE_WINDOW
/// the part of the current token that was in earlier buffers
token_carry_buffer token_carry{}; // NOLINT(readability-redundant-member-init)
/// start of the current token's part in the buffer, or nullptr
const char* token_segment = nullptr;
/// whether the character last returned by get_character() is in the buffer
bool current_in_buffer = false;
/// whether a token is tracked at all; the binary readers never start one
bool tracking_token = false;
#endif
};
/*!
include/nlohmann/detail/input/json_sax.hpp
+2 -1
View File
@@ -904,7 +904,8 @@ class json_sax_dom_parser : public json_sax_dom_error_state
{
hashes.push_back(hasher(element.first));
}
ordered_data.key_indexes.emplace_back(new object_key_index(std::move(hashes)));
std::unique_ptr<object_key_index> index(new object_key_index(std::move(hashes))); // NOLINT(cppcoreguidelines-owning-memory,modernize-make-unique): std::make_unique is C++14
ordered_data.key_indexes.push_back(std::move(index));
f.ordered.index = ordered_data.key_indexes.back().get();
}
include/nlohmann/detail/macro_unscope.hpp
+1
View File
@@ -22,6 +22,7 @@
#undef JSON_DISABLE_ENUM_SERIALIZATION
#undef JSON_DISABLE_TUPLE_REFERENCE_CONVERSION
#undef JSON_UNLOCKED_FILE_IO
#undef JSON_FILE_WINDOW
#undef JSON_DTOA_SSE2
#undef JSON_DTOA_NEON
#undef JSON_LITTLE_ENDIAN_TARGET
include/nlohmann/detail/output/binary_writer.hpp
+4 -7
View File
@@ -3126,22 +3126,19 @@ class binary_writer
// negative fixnum
write_number(static_cast<std::int8_t>(j.m_data.m_value.number_integer));
}
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int8_t>::min)() &&
j.m_data.m_value.number_integer <= (std::numeric_limits<std::int8_t>::max)())
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int8_t>::min)())
{
// int 8
oa.write_character(to_char_type(0xD0));
write_number(static_cast<std::int8_t>(j.m_data.m_value.number_integer));
}
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int16_t>::min)() &&
j.m_data.m_value.number_integer <= (std::numeric_limits<std::int16_t>::max)())
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int16_t>::min)())
{
// int 16
oa.write_character(to_char_type(0xD1));
write_number(static_cast<std::int16_t>(j.m_data.m_value.number_integer));
}
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int32_t>::min)() &&
j.m_data.m_value.number_integer <= (std::numeric_limits<std::int32_t>::max)())
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int32_t>::min)())
{
// int 32
oa.write_character(to_char_type(0xD2));
@@ -4057,7 +4054,7 @@ class binary_writer
Containers, strings, high-precision numbers, booleans and null cannot be
declared as the single type of an optimized container in BJData; such a
container is written unoptimized. The reader rejects them with the same
list (binary_reader::is_bjd_excluded_optimized_type()).
list (binary_reader::is_valid_optimized_type()).
*/
static constexpr bool is_bjdata_excluded_type_marker(const CharType marker) noexcept
{
include/nlohmann/detail/output/output_adapters.hpp
+17 -4
View File
@@ -116,6 +116,10 @@ inline void copy_short(CharType* dst, const CharType* src, const std::size_t len
/// the number of characters an empty vector is grown to by output_vector_sink
constexpr std::size_t min_vector_sink_capacity = 64;
/// the number of characters output_vector_sink makes writable ahead of its
/// position at a time: 64 KiB of the vector's capacity, not all of it
constexpr std::size_t vector_sink_window = 65536;
/// @brief non-virtual output sink writing into a std::vector
///
/// This sink is not part of the virtual output_adapter_protocol hierarchy: it is
@@ -129,7 +133,8 @@ constexpr std::size_t min_vector_sink_capacity = 64;
/// encoding them: insert() is an out-of-line call into a routine that can insert
/// anywhere, and resize() is one as well with libstdc++. The sink therefore keeps
/// its own write position: it grows the vector geometrically ahead of the
/// position and copies each write to it, so a write is a capacity check and a
/// position (making @ref vector_sink_window characters of it writable at a
/// time) and copies each write to it, so a write is a capacity check and a
/// short copy. The destructor shrinks the vector to the bytes actually written,
/// also when a write throws; shrinking a vector never allocates. The sink owns
/// that trim, so it can be moved but not copied, and the vector must not be used
@@ -277,9 +282,17 @@ class output_vector_sink
// reallocate for every few bytes
const std::size_t written = position();
const std::size_t needed = written + length;
v->resize((std::max)(min_vector_sink_capacity, needed <= v->capacity()
? v->capacity()
: (std::max)(needed, v->capacity() * 2)));
const std::size_t capacity = (std::max)(min_vector_sink_capacity, needed <= v->capacity()
? v->capacity()
: (std::max)(needed, v->capacity() * 2));
v->reserve(capacity);
// resize() zeroes the characters it adds. Zeroing all of a doubled
// capacity, megabytes of a fresh allocation, at once faults in its
// pages and evicts them from the cache before the writer gets there,
// so its stores miss again; a window ahead of the position is still
// cached when they come (the binary writers on a long array of
// numbers: 4-26 % faster on x86, 1-2.5 % on Apple M1)
v->resize((std::min)(capacity, (std::max)(needed, written + vector_sink_window)));
cursor = v->data() + written;
limit = v->data() + v->size();
}
include/nlohmann/detail/output/serializer.hpp
+23 -19
View File
@@ -8,7 +8,7 @@
#pragma once
#include <algorithm> // remove, fill, find, none_of, min
#include <algorithm> // copy, none_of, min, search
#include <array> // array
#include <clocale> // localeconv, lconv
#include <cmath> // isfinite
@@ -2080,31 +2080,35 @@ class serializer
// check if the buffer was large enough
JSON_ASSERT(static_cast<std::size_t>(len) < number_buffer.size());
// look up the locale's thousands separator and decimal point now,
// matching what snprintf_float() just used (see lexer::get_decimal_point())
// look up the locale's decimal point now, matching what
// snprintf_float() just used (see get_decimal_point() in
// number_parse.hpp); it is a string, which can be longer than one
// byte (U+066B in ps_AF, #5993).
// A thousands separator needs no handling: %g never groups digits.
const auto* loc = std::localeconv();
JSON_ASSERT(loc != nullptr);
const char thousands_sep = (loc->thousands_sep == nullptr) ? '\0' : *loc->thousands_sep;
const char decimal_point = (loc->decimal_point == nullptr) ? '\0' : *loc->decimal_point;
// erase thousands separators
if (thousands_sep != '\0')
{
// NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::remove returns an iterator, see https://github.com/nlohmann/json/issues/3081
const auto end = std::remove(number_buffer.begin(), number_buffer.begin() + len, thousands_sep);
std::fill(end, number_buffer.end(), '\0');
JSON_ASSERT((end - number_buffer.begin()) <= len);
len = (end - number_buffer.begin());
}
const char* const decimal_point = (loc->decimal_point == nullptr) ? "" : loc->decimal_point;
const std::size_t decimal_point_len = std::char_traits<char>::length(decimal_point);
// convert decimal point to '.'
if (decimal_point != '\0' && decimal_point != '.')
if ((decimal_point_len > 1) || (decimal_point_len == 1 && decimal_point[0] != '.'))
{
// NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::find returns an iterator, see https://github.com/nlohmann/json/issues/3081
const auto dec_pos = std::find(number_buffer.begin(), number_buffer.end(), decimal_point);
if (dec_pos != number_buffer.end())
const auto first = number_buffer.begin();
const auto last = first + len;
// NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::search returns an iterator, see https://github.com/nlohmann/json/issues/3081
const auto dec_pos = std::search(first, last, decimal_point, decimal_point + decimal_point_len);
if (dec_pos != last)
{
*dec_pos = '.';
if (decimal_point_len > 1)
{
// move the fraction and exponent behind the '.' (std::copy
// allows the overlap, as the destination is before the source)
// NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::copy returns an iterator, see https://github.com/nlohmann/json/issues/3081
const auto end = std::copy(dec_pos + static_cast<std::ptrdiff_t>(decimal_point_len), last, dec_pos + 1);
*end = '\0';
len = end - first;
}
}
}
include/nlohmann/detail/view/builder.hpp
+6 -6
View File
@@ -1168,20 +1168,20 @@ indent_done:
if (negative)
{
++p;
if (NLOHMANN_VIEW_UNLIKELY(cur() < '0' || cur() > '9'))
{
return fail(error_code::number_after_minus);
}
}
const unsigned char* const int_start = p;
if (cur() == '0')
{
++p;
}
else if (!negative || NLOHMANN_VIEW_LIKELY(cur() >= '1' && cur() <= '9'))
{
// (without a sign, the dispatch saw a digit)
p = skip_digits(p + 1, e);
}
else
{
return fail(error_code::number_after_minus);
// (a digit: the dispatch or the check after the sign saw it)
p = skip_digits(p + 1, e);
}
const auto int_digits = static_cast<std::size_t>(p - int_start);
std::size_t frac_digits = 0;
include/nlohmann/detail/view/errors.hpp
+2 -5
View File
@@ -230,8 +230,7 @@ void value_range(const document_data& d, const node* n, std::size_t& start, std:
/// the context basic_json puts in front of the message of an exception about
/// a value: "(/path) " with JSON_DIAGNOSTICS (none for the root), then
/// "(bytes a-b) " with JSON_DIAGNOSTIC_POSITIONS (also for the root); with
/// JSON_DIAGNOSTICS, nothing for a value that is no longer part of the document
/// "(bytes a-b) " with JSON_DIAGNOSTIC_POSITIONS (also for the root)
///
/// This and the throw helpers that take an error_site are templates, so that
/// the path and range code is instantiated only where an exception can be
@@ -252,12 +251,10 @@ std::string diagnostics(const error_site site)
std::string context;
#if JSON_DIAGNOSTICS
std::vector<std::string> tokens;
// a value that is no longer part of the document has no path, and its
// node still holds the bytes it had in the source: no context at all
const bool found = edited ? value_path<true>(d, site.value(), tokens) : value_path<false>(d, site.value(), tokens);
if (!found)
{
// context is still empty; returning it keeps the copy elided (-Wnrvo)
// a value that is not found has no path, and with it no bytes
return context;
}
if (!tokens.empty())
single_include/nlohmann/json.hpp
Generated
+314 -90
View File
@@ -9167,6 +9167,19 @@ NLOHMANN_JSON_NAMESPACE_END
#define JSON_UNLOCKED_FILE_IO 0
#endif
#undef JSON_UNLOCKED_FILE_IO_MSAN
// Whether file_input_adapter scans the buffer of the FILE directly, as
// getc_unlocked() reads it: the fields it uses are those that the C
// library's own getc_unlocked() macro uses (glibc: _IO_read_ptr and
// _IO_read_end; Apple: _p and _r). It needs the file locked for the whole
// parse, as JSON_UNLOCKED_FILE_IO == 1 has it (so JSON_DISABLE_UNLOCKED_FILE_IO
// and MemorySanitizer builds turn it off).
// (uClibc defines __GLIBC__ as well, but its FILE has other fields)
#if JSON_UNLOCKED_FILE_IO == 1 && ((defined(__GLIBC__) && !defined(__UCLIBC__)) || defined(__APPLE__))
#define JSON_FILE_WINDOW 1
#else
#define JSON_FILE_WINDOW 0
#endif
#endif // JSON_NO_IO
NLOHMANN_JSON_NAMESPACE_BEGIN
@@ -9288,8 +9301,12 @@ class token_carry_buffer
char* m_capacity_end = nullptr;
};
/*!
Input adapter for stdio file access. This adapter read only 1 byte and do not use any
buffer. This adapter is a very low level adapter.
Input adapter for stdio file access. The file is locked for the lifetime of the
adapter and read with the unlocked stdio functions (see
JSON_DISABLE_UNLOCKED_FILE_IO). With glibc and the Apple C library, the
characters in the buffer of the FILE are also scanned in bulk, as the get area
of a stream is (see input_stream_adapter): exactly the characters getc_unlocked()
would return are consumed, so the file is left where it was left before.
*/
class file_input_adapter
{
@@ -9308,6 +9325,12 @@ class file_input_adapter
file_input_adapter(const file_input_adapter&) = delete;
file_input_adapter(file_input_adapter&& rhs) noexcept
: m_file(rhs.m_file)
#if JSON_FILE_WINDOW
, token_carry(std::move(rhs.token_carry))
, token_segment(rhs.token_segment)
, current_in_buffer(rhs.current_in_buffer)
, tracking_token(rhs.tracking_token)
#endif
{
// the lock is owned by the thread, not the adapter: hand it over
rhs.m_file = nullptr;
@@ -9319,6 +9342,20 @@ class file_input_adapter
unlock();
}
#if JSON_FILE_WINDOW
std::char_traits<char>::int_type get_character()
{
// what getc_unlocked() does, while the buffer has characters
const char* const next = buffer_ptr();
if (JSON_HEDLEY_LIKELY(next != buffer_end()))
{
current_in_buffer = true;
buffer_bump(1);
return std::char_traits<char>::to_int_type(*next);
}
return get_character_slow();
}
#else
std::char_traits<char>::int_type get_character() noexcept
{
// the file is locked for the lifetime of the adapter, so the
@@ -9331,6 +9368,7 @@ class file_input_adapter
return std::fgetc(m_file);
#endif
}
#endif
// returns the number of characters successfully read
template<class T>
@@ -9339,7 +9377,134 @@ class file_input_adapter
return fread(dest, 1, sizeof(T) * count, m_file);
}
#if JSON_FILE_WINDOW
// The lexer may scan the buffer of the FILE directly, as the window of
// input_stream_adapter: the buffer ends wherever the C library's buffer
// ends, and is refilled by the next get_character().
static constexpr bool supports_bulk_scan = true;
static constexpr bool bulk_window = true;
// Pointer to the next unread character; only valid when bulk_remaining() > 0.
const char* bulk_data() const
{
return buffer_ptr();
}
// Number of unread characters in the buffer.
std::size_t bulk_remaining() const
{
if (!current_in_buffer)
{
return 0;
}
return static_cast<std::size_t>(buffer_end() - buffer_ptr());
}
// Consume @a n characters previously inspected via bulk_data().
void bulk_skip(std::size_t n)
{
JSON_ASSERT(n <= bulk_remaining());
buffer_bump(n);
}
// The adapter keeps the current token for the lexer's error messages, as
// input_stream_adapter does.
static constexpr bool supports_token_tracking = true;
void begin_token() noexcept
{
tracking_token = true;
token_carry.clear();
token_segment = buffer_ptr();
}
void mark_token_start(std::char_traits<char>::int_type c)
{
tracking_token = true;
token_carry.clear();
if (current_in_buffer)
{
token_segment = buffer_ptr() - 1;
}
else
{
token_segment = nullptr;
token_carry.push_back(std::char_traits<char>::to_char_type(c));
}
}
void copy_token(std::vector<char>& out, bool drop_last) const
{
token_carry.copy_to(out);
if (token_segment != nullptr)
{
out.insert(out.end(), token_segment, buffer_ptr());
}
if (drop_last && !out.empty())
{
out.pop_back();
}
}
#endif
private:
#if JSON_FILE_WINDOW
// the buffer of the FILE: [buffer_ptr(), buffer_end()) are the characters
// getc_unlocked() would return next
#if defined(__GLIBC__)
const char* buffer_ptr() const noexcept
{
return m_file->_IO_read_ptr;
}
const char* buffer_end() const noexcept
{
return m_file->_IO_read_end;
}
void buffer_bump(std::size_t n) noexcept
{
m_file->_IO_read_ptr += n;
}
#else
const char* buffer_ptr() const noexcept
{
return reinterpret_cast<const char*>(m_file->_p);
}
const char* buffer_end() const noexcept
{
return m_file->_r > 0 ? reinterpret_cast<const char*>(m_file->_p) + m_file->_r : reinterpret_cast<const char*>(m_file->_p);
}
void buffer_bump(std::size_t n) noexcept
{
m_file->_p += n;
m_file->_r -= static_cast<int>(n);
}
#endif
// the buffer is exhausted: getc_unlocked() refills it
JSON_HEDLEY_NEVER_INLINE std::char_traits<char>::int_type get_character_slow()
{
if (token_segment != nullptr)
{
token_carry.append(token_segment, buffer_end());
token_segment = nullptr;
}
const auto res = getc_unlocked(m_file);
if (res == EOF)
{
current_in_buffer = false;
return std::char_traits<char>::eof();
}
// the character was taken from the refilled buffer, at buffer_ptr() - 1
current_in_buffer = true;
if (tracking_token)
{
token_segment = buffer_ptr() - 1;
}
return res;
}
#endif
// Lock the file once for the whole parse instead of once per character.
// The lock is recursive, so fread() and the user's own stdio calls on the
// same thread keep working.
@@ -9368,6 +9533,16 @@ class file_input_adapter
/// the file pointer to read from
std::FILE* m_file;
#if JSON_FILE_WINDOW
/// the part of the current token that was in earlier buffers
token_carry_buffer token_carry{}; // NOLINT(readability-redundant-member-init)
/// start of the current token's part in the buffer, or nullptr
const char* token_segment = nullptr;
/// whether the character last returned by get_character() is in the buffer
bool current_in_buffer = false;
/// whether a token is tracked at all; the binary readers never start one
bool tracking_token = false;
#endif
};
/*!
@@ -16538,7 +16713,8 @@ class json_sax_dom_parser : public json_sax_dom_error_state
{
hashes.push_back(hasher(element.first));
}
ordered_data.key_indexes.emplace_back(new object_key_index(std::move(hashes)));
std::unique_ptr<object_key_index> index(new object_key_index(std::move(hashes))); // NOLINT(cppcoreguidelines-owning-memory,modernize-make-unique): std::make_unique is C++14
ordered_data.key_indexes.push_back(std::move(index));
f.ordered.index = ordered_data.key_indexes.back().get();
}
@@ -18359,8 +18535,8 @@ class binary_reader
nested document could declare a length that disagrees with where its
terminator actually falls and quietly hand the bytes in between to the
enclosing document. A well-formed document is at least 5 bytes (the prefix
plus the terminator); the equality also rejects those impossible sizes,
since at least 5 bytes are always consumed.
plus the terminator); open_bson_document() rejects a smaller size before
it is stored, so @a document_size is never negative here.
@param[in] document_start value of chars_read before the size prefix
@param[in] document_size the declared document size
@@ -18368,7 +18544,7 @@ class binary_reader
*/
bool check_bson_document_size(const std::size_t document_start, const std::int32_t document_size)
{
if (JSON_HEDLEY_UNLIKELY(document_size < 0 || static_cast<std::size_t>(document_size) != chars_read - document_start))
if (JSON_HEDLEY_UNLIKELY(static_cast<std::size_t>(document_size) != chars_read - document_start))
{
return bson_document_size_error(document_size, chars_read - document_start);
}
@@ -19039,7 +19215,7 @@ class binary_reader
{
std::uint64_t len{};
std::size_t size{};
return get_cbor_argument(len) && get_cbor_container_size(len, size, "array") && enter_cbor_array(size);
return get_cbor_argument(len) && get_container_size(len, size, "array") && enter_cbor_array(size);
}
case 0x9F: // array (indefinite length)
@@ -19079,7 +19255,7 @@ class binary_reader
{
std::uint64_t len{};
std::size_t size{};
return get_cbor_argument(len) && get_cbor_container_size(len, size, "map") && enter_object(size);
return get_cbor_argument(len) && get_container_size(len, size, "map") && enter_object(size);
}
case 0xBF: // map (indefinite length)
@@ -19715,7 +19891,7 @@ class binary_reader
}
/*!
@brief narrow a definite CBOR array/map length to std::size_t
@brief narrow a definite CBOR or MessagePack array/map length to std::size_t
A definite length is rejected if it does not fit in std::size_t or if it
equals detail::unknown_size(), which is reserved to mark an indefinite-
@@ -19728,7 +19904,7 @@ class binary_reader
@param[in] context "array" or "map", for the error message
@return whether the length is usable
*/
bool get_cbor_container_size(const std::uint64_t len, std::size_t& result, const char* context)
bool get_container_size(const std::uint64_t len, std::size_t& result, const char* context)
{
if (JSON_HEDLEY_UNLIKELY(!value_in_range_of<std::size_t>(len) || len == detail::unknown_size()))
{
@@ -20324,7 +20500,8 @@ class binary_reader
case 0xDD: // array 32
{
std::uint32_t len{};
return get_number(len) && enter_msgpack_array(conditional_static_cast<std::size_t>(len));
std::size_t size{};
return get_number(len) && get_container_size(len, size, "array") && enter_msgpack_array(size);
}
case 0xDE: // map 16
@@ -20336,7 +20513,8 @@ class binary_reader
case 0xDF: // map 32
{
std::uint32_t len{};
return get_number(len) && enter_object(conditional_static_cast<std::size_t>(len));
std::size_t size{};
return get_number(len) && get_container_size(len, size, "map") && enter_object(size);
}
// negative fixint
@@ -21107,16 +21285,13 @@ class binary_reader
{
if (size_and_type.second != 0)
{
if (size_and_type.second != 'N')
for (std::size_t i = 0; i < size_and_type.first; ++i)
{
for (std::size_t i = 0; i < size_and_type.first; ++i)
if (JSON_HEDLEY_UNLIKELY(!get_ubjson_size_value(dimlen, no_ndarray, size_and_type.second)))
{
if (JSON_HEDLEY_UNLIKELY(!get_ubjson_size_value(dimlen, no_ndarray, size_and_type.second)))
{
return false;
}
dim.push_back(dimlen);
return false;
}
dim.push_back(dimlen);
}
}
else
@@ -21146,6 +21321,27 @@ class binary_reader
return true;
}
/*!
@brief store the count of an optimized container (or the length of a string)
A count equal to npos is rejected: npos marks a container whose count is
not known, so a count of that value would be read as "no count" (compare
get_container_size()). No container can hold that many elements.
@param[in] count the count read from the input
@param[out] result set to @a count unless it is rejected
@return whether @a count is usable
*/
bool store_ubjson_count(const std::size_t count, std::size_t& result)
{
if (JSON_HEDLEY_UNLIKELY(count == npos))
{
return out_of_range_error(exception_id::container_too_large, "integer value overflow", "size");
}
result = count;
return true;
}
/*!
@brief read a UBJSON/BJData optimized-container count of a signed marker
type ('i', 'I', 'l', 'L') and narrow it to std::size_t
@@ -21176,8 +21372,7 @@ class binary_reader
{
return out_of_range_error(exception_id::container_too_large, "integer value overflow", "size");
}
result = static_cast<std::size_t>(number); // NOLINT(bugprone-signed-char-misuse,cert-str34-c): number is not a char
return true;
return store_ubjson_count(static_cast<std::size_t>(number), result); // NOLINT(bugprone-signed-char-misuse,cert-str34-c): number is not a char
}
/*!
@@ -21254,8 +21449,7 @@ class binary_reader
{
return false;
}
result = conditional_static_cast<std::size_t>(number);
return true;
return store_ubjson_count(conditional_static_cast<std::size_t>(number), result);
}
case 'M':
@@ -21273,8 +21467,7 @@ class binary_reader
{
return out_of_range_error(exception_id::container_too_large, "integer value overflow", "size");
}
result = detail::conditional_static_cast<std::size_t>(number);
return true;
return store_ubjson_count(detail::conditional_static_cast<std::size_t>(number), result);
}
case '[':
@@ -21318,11 +21511,9 @@ class binary_reader
// follow the documented _ArrayType_, _ArraySize_, _ArrayData_ order
if (ndarray_dtype != 0)
{
// every optimized type marker is_valid_optimized_type() accepts for BJData has a name
const char* type_name = bjd_type_name(ndarray_dtype);
if (JSON_HEDLEY_UNLIKELY(type_name == nullptr))
{
return unexpected_byte("invalid byte", "type");
}
JSON_ASSERT(type_name != nullptr);
string_t type_key = "_ArrayType_";
string_t type = type_name; // sax->string() takes a reference
@@ -21405,12 +21596,6 @@ class binary_reader
if (current == '$')
{
result.second = get(); // must not ignore 'N', because 'N' maybe the type
if (input_format == input_format_t::bjdata
&& JSON_HEDLEY_UNLIKELY(is_bjd_excluded_optimized_type(result.second)))
{
return optimized_type_error();
}
if (JSON_HEDLEY_UNLIKELY(!unexpect_eof("type")))
{
return false;
@@ -21438,7 +21623,7 @@ class binary_reader
// an ndarray was read here only if the flag flipped; when it was
// seeded true, get_ubjson_size_value() already rejected the nested
// dimension vector
if (input_format == input_format_t::bjdata && is_ndarray && !inside_ndarray)
if (is_ndarray && !inside_ndarray)
{
result.second |= (1 << 8); // use bit 8 to indicate ndarray, all UBJSON and BJData markers should be ASCII letters
}
@@ -21448,7 +21633,7 @@ class binary_reader
if (current == '#')
{
const bool is_error = get_ubjson_size_value(result.first, is_ndarray);
if (input_format == input_format_t::bjdata && is_ndarray && !inside_ndarray)
if (is_ndarray && !inside_ndarray)
{
return last_byte_error(exception_id::unexpected_byte, "ndarray requires both type and size", "size");
}
@@ -21622,7 +21807,6 @@ class binary_reader
JSON_HEDLEY_NEVER_INLINE
bool parse_ubjson_typed_run(std::size_t& remaining, const char_int_type type, std::true_type /*bulk*/)
{
const bool bjdata = input_format == input_format_t::bjdata;
switch (type)
{
case 'U':
@@ -21636,11 +21820,11 @@ class binary_reader
case 'L':
return parse_ubjson_typed_run<std::int64_t>(remaining);
case 'u':
return !bjdata || parse_ubjson_typed_run<std::uint16_t>(remaining);
return parse_ubjson_typed_run<std::uint16_t>(remaining);
case 'm':
return !bjdata || parse_ubjson_typed_run<std::uint32_t>(remaining);
return parse_ubjson_typed_run<std::uint32_t>(remaining);
case 'M':
return !bjdata || parse_ubjson_typed_run<std::uint64_t>(remaining);
return parse_ubjson_typed_run<std::uint64_t>(remaining);
case 'd':
return parse_ubjson_typed_run<float>(remaining);
case 'D':
@@ -21721,7 +21905,7 @@ class binary_reader
// if bit-8 of size_and_type.second is set to 1, encode bjdata ndarray as an object in JData annotated array format (https://github.com/NeuroJSON/jdata):
// {"_ArrayType_" : "typeid", "_ArraySize_" : [n1, n2, ...], "_ArrayData_" : [v1, v2, ...]}
if (input_format == input_format_t::bjdata && size_and_type.first != npos && (size_and_type.second & (1 << 8)) != 0)
if ((size_and_type.second & (1 << 8)) != 0)
{
size_and_type.second &= ~(static_cast<char_int_type>(1) << 8); // use bit 8 to indicate ndarray, here we remove the bit to restore the type marker
@@ -21780,7 +21964,7 @@ class binary_reader
}
// If BJData type marker is 'B' decode as binary
if (input_format == input_format_t::bjdata && size_and_type.first != npos && size_and_type.second == 'B')
if (size_and_type.first != npos && size_and_type.second == 'B')
{
binary_t result;
return get_binary(size_and_type.first, result) && sax->binary(result);
@@ -21829,7 +22013,7 @@ class binary_reader
}
// do not accept ND-array size in objects in BJData
if (input_format == input_format_t::bjdata && size_and_type.first != npos && (size_and_type.second & (1 << 8)) != 0)
if ((size_and_type.second & (1 << 8)) != 0)
{
return last_byte_error(exception_id::unexpected_byte, "BJData object does not support ND-array size in optimized format", "object");
}
@@ -22894,6 +23078,14 @@ class binary_reader
const char* context,
ContainerType& result)
{
// a string that is in the block of input as a whole is appended from
// it, without the zero-filling resize() below
constexpr bool from_block = bulk_scan && std::is_same<ContainerType, string_t>::value;
if (append_from_block(len, result, std::integral_constant<bool, from_block> {}))
{
return true;
}
// upper bound on the number of bytes read (and allocated) per chunk
constexpr std::size_t chunk_size = 4096;
@@ -22930,6 +23122,36 @@ class binary_reader
return true;
}
/// append the @a len bytes at the current position to @a result, if the
/// input holds them in one block; false (with nothing read) otherwise
template<typename NumberType>
bool append_from_block(const NumberType len, string_t& result, std::true_type /*block*/)
{
if (len <= 0)
{
return false;
}
// (len > 0, so the unsigned type holds it; casting a signed char
// straight to std::size_t would trip bugprone-signed-char-misuse)
const auto ulen = static_cast<typename std::make_unsigned<NumberType>::type>(len);
const std::size_t remaining = ia.bulk_remaining();
if (static_cast<std::uintmax_t>(ulen) > static_cast<std::uintmax_t>(remaining))
{
return false; // (the loop reports the premature end)
}
const auto n = static_cast<std::size_t>(ulen);
result.append(reinterpret_cast<const typename string_t::value_type*>(ia.bulk_data()), n);
ia.bulk_skip(n);
chars_read += n;
return true;
}
template<typename NumberType, typename ContainerType>
static bool append_from_block(const NumberType /*len*/, ContainerType& /*result*/, std::false_type /*block*/) noexcept
{
return false;
}
/*!
@param[in] context further context information (for diagnostics)
@return whether the last read character is not EOF
@@ -23110,8 +23332,9 @@ class binary_reader
JSON_PRIVATE_UNLESS_TESTED:
/*!
@brief check whether @a marker is a type marker that may follow '$'
UBJSON: Z N T F i U I l L d D H C S [ {; BJData: the numeric markers and C
(BJData's excluded markers are rejected separately).
UBJSON: Z N T F i U I l L d D H C S [ {; BJData: the numeric markers and C.
The markers BJData excludes (F H N S T Z [ {) are the ones
binary_writer::is_bjdata_excluded_type_marker() lists; keep the two in sync.
*/
bool is_valid_optimized_type(const char_int_type marker) const noexcept
{
@@ -23146,20 +23369,6 @@ class binary_reader
}
}
/*!
@brief whether @a marker is excluded from BJData's optimized ND-array types
@return whether @a marker is one of 'F', 'H', 'N', 'S', 'T', 'Z', '[', '{'
Mirrors binary_writer's @ref binary_writer::is_bjdata_excluded_type_marker
"is_bjdata_excluded_type_marker()`, which encodes the same list the other
way; keep the two in sync.
*/
static constexpr bool is_bjd_excluded_optimized_type(const char_int_type marker) noexcept
{
return marker == '[' || marker == '{' || marker == 'S' || marker == 'H'
|| marker == 'T' || marker == 'F' || marker == 'N' || marker == 'Z';
}
/*!
@brief look up the ND-array element type name for a BJData dtype marker
@return the type name ("uint8", "int8", ...), or nullptr if @a marker does
@@ -27491,6 +27700,10 @@ inline void copy_short(CharType* dst, const CharType* src, const std::size_t len
/// the number of characters an empty vector is grown to by output_vector_sink
constexpr std::size_t min_vector_sink_capacity = 64;
/// the number of characters output_vector_sink makes writable ahead of its
/// position at a time: 64 KiB of the vector's capacity, not all of it
constexpr std::size_t vector_sink_window = 65536;
/// @brief non-virtual output sink writing into a std::vector
///
/// This sink is not part of the virtual output_adapter_protocol hierarchy: it is
@@ -27504,7 +27717,8 @@ constexpr std::size_t min_vector_sink_capacity = 64;
/// encoding them: insert() is an out-of-line call into a routine that can insert
/// anywhere, and resize() is one as well with libstdc++. The sink therefore keeps
/// its own write position: it grows the vector geometrically ahead of the
/// position and copies each write to it, so a write is a capacity check and a
/// position (making @ref vector_sink_window characters of it writable at a
/// time) and copies each write to it, so a write is a capacity check and a
/// short copy. The destructor shrinks the vector to the bytes actually written,
/// also when a write throws; shrinking a vector never allocates. The sink owns
/// that trim, so it can be moved but not copied, and the vector must not be used
@@ -27652,9 +27866,17 @@ class output_vector_sink
// reallocate for every few bytes
const std::size_t written = position();
const std::size_t needed = written + length;
v->resize((std::max)(min_vector_sink_capacity, needed <= v->capacity()
? v->capacity()
: (std::max)(needed, v->capacity() * 2)));
const std::size_t capacity = (std::max)(min_vector_sink_capacity, needed <= v->capacity()
? v->capacity()
: (std::max)(needed, v->capacity() * 2));
v->reserve(capacity);
// resize() zeroes the characters it adds. Zeroing all of a doubled
// capacity, megabytes of a fresh allocation, at once faults in its
// pages and evicts them from the cache before the writer gets there,
// so its stores miss again; a window ahead of the position is still
// cached when they come (the binary writers on a long array of
// numbers: 4-26 % faster on x86, 1-2.5 % on Apple M1)
v->resize((std::min)(capacity, (std::max)(needed, written + vector_sink_window)));
cursor = v->data() + written;
limit = v->data() + v->size();
}
@@ -31110,22 +31332,19 @@ class binary_writer
// negative fixnum
write_number(static_cast<std::int8_t>(j.m_data.m_value.number_integer));
}
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int8_t>::min)() &&
j.m_data.m_value.number_integer <= (std::numeric_limits<std::int8_t>::max)())
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int8_t>::min)())
{
// int 8
oa.write_character(to_char_type(0xD0));
write_number(static_cast<std::int8_t>(j.m_data.m_value.number_integer));
}
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int16_t>::min)() &&
j.m_data.m_value.number_integer <= (std::numeric_limits<std::int16_t>::max)())
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int16_t>::min)())
{
// int 16
oa.write_character(to_char_type(0xD1));
write_number(static_cast<std::int16_t>(j.m_data.m_value.number_integer));
}
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int32_t>::min)() &&
j.m_data.m_value.number_integer <= (std::numeric_limits<std::int32_t>::max)())
else if (j.m_data.m_value.number_integer >= (std::numeric_limits<std::int32_t>::min)())
{
// int 32
oa.write_character(to_char_type(0xD2));
@@ -32041,7 +32260,7 @@ class binary_writer
Containers, strings, high-precision numbers, booleans and null cannot be
declared as the single type of an optimized container in BJData; such a
container is written unoptimized. The reader rejects them with the same
list (binary_reader::is_bjd_excluded_optimized_type()).
list (binary_reader::is_valid_optimized_type()).
*/
static constexpr bool is_bjdata_excluded_type_marker(const CharType marker) noexcept
{
@@ -33446,7 +33665,7 @@ NLOHMANN_JSON_NAMESPACE_END
#include <algorithm> // remove, fill, find, none_of, min
#include <algorithm> // copy, none_of, min, search
#include <array> // array
#include <clocale> // localeconv, lconv
#include <cmath> // isfinite
@@ -37300,31 +37519,35 @@ class serializer
// check if the buffer was large enough
JSON_ASSERT(static_cast<std::size_t>(len) < number_buffer.size());
// look up the locale's thousands separator and decimal point now,
// matching what snprintf_float() just used (see lexer::get_decimal_point())
// look up the locale's decimal point now, matching what
// snprintf_float() just used (see get_decimal_point() in
// number_parse.hpp); it is a string, which can be longer than one
// byte (U+066B in ps_AF, #5993).
// A thousands separator needs no handling: %g never groups digits.
const auto* loc = std::localeconv();
JSON_ASSERT(loc != nullptr);
const char thousands_sep = (loc->thousands_sep == nullptr) ? '\0' : *loc->thousands_sep;
const char decimal_point = (loc->decimal_point == nullptr) ? '\0' : *loc->decimal_point;
// erase thousands separators
if (thousands_sep != '\0')
{
// NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::remove returns an iterator, see https://github.com/nlohmann/json/issues/3081
const auto end = std::remove(number_buffer.begin(), number_buffer.begin() + len, thousands_sep);
std::fill(end, number_buffer.end(), '\0');
JSON_ASSERT((end - number_buffer.begin()) <= len);
len = (end - number_buffer.begin());
}
const char* const decimal_point = (loc->decimal_point == nullptr) ? "" : loc->decimal_point;
const std::size_t decimal_point_len = std::char_traits<char>::length(decimal_point);
// convert decimal point to '.'
if (decimal_point != '\0' && decimal_point != '.')
if ((decimal_point_len > 1) || (decimal_point_len == 1 && decimal_point[0] != '.'))
{
// NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::find returns an iterator, see https://github.com/nlohmann/json/issues/3081
const auto dec_pos = std::find(number_buffer.begin(), number_buffer.end(), decimal_point);
if (dec_pos != number_buffer.end())
const auto first = number_buffer.begin();
const auto last = first + len;
// NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::search returns an iterator, see https://github.com/nlohmann/json/issues/3081
const auto dec_pos = std::search(first, last, decimal_point, decimal_point + decimal_point_len);
if (dec_pos != last)
{
*dec_pos = '.';
if (decimal_point_len > 1)
{
// move the fraction and exponent behind the '.' (std::copy
// allows the overlap, as the destination is before the source)
// NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::copy returns an iterator, see https://github.com/nlohmann/json/issues/3081
const auto end = std::copy(dec_pos + static_cast<std::ptrdiff_t>(decimal_point_len), last, dec_pos + 1);
*end = '\0';
len = end - first;
}
}
}
@@ -46338,6 +46561,7 @@ struct formatter<nlohmann::NLOHMANN_BASIC_JSON_TPL, char> // NOLINT(cert-dcl58-c
#undef JSON_DISABLE_ENUM_SERIALIZATION
#undef JSON_DISABLE_TUPLE_REFERENCE_CONVERSION
#undef JSON_UNLOCKED_FILE_IO
#undef JSON_FILE_WINDOW
#undef JSON_DTOA_SSE2
#undef JSON_DTOA_NEON
#undef JSON_LITTLE_ENDIAN_TARGET
single_include/nlohmann/json_view.hpp
Generated
+8 -11
View File
@@ -2473,20 +2473,20 @@ indent_done:
if (negative)
{
++p;
if (NLOHMANN_VIEW_UNLIKELY(cur() < '0' || cur() > '9'))
{
return fail(error_code::number_after_minus);
}
}
const unsigned char* const int_start = p;
if (cur() == '0')
{
++p;
}
else if (!negative || NLOHMANN_VIEW_LIKELY(cur() >= '1' && cur() <= '9'))
{
// (without a sign, the dispatch saw a digit)
p = skip_digits(p + 1, e);
}
else
{
return fail(error_code::number_after_minus);
// (a digit: the dispatch or the check after the sign saw it)
p = skip_digits(p + 1, e);
}
const auto int_digits = static_cast<std::size_t>(p - int_start);
std::size_t frac_digits = 0;
@@ -5059,8 +5059,7 @@ void value_range(const document_data& d, const node* n, std::size_t& start, std:
/// the context basic_json puts in front of the message of an exception about
/// a value: "(/path) " with JSON_DIAGNOSTICS (none for the root), then
/// "(bytes a-b) " with JSON_DIAGNOSTIC_POSITIONS (also for the root); with
/// JSON_DIAGNOSTICS, nothing for a value that is no longer part of the document
/// "(bytes a-b) " with JSON_DIAGNOSTIC_POSITIONS (also for the root)
///
/// This and the throw helpers that take an error_site are templates, so that
/// the path and range code is instantiated only where an exception can be
@@ -5081,12 +5080,10 @@ std::string diagnostics(const error_site site)
std::string context;
#if JSON_DIAGNOSTICS
std::vector<std::string> tokens;
// a value that is no longer part of the document has no path, and its
// node still holds the bytes it had in the source: no context at all
const bool found = edited ? value_path<true>(d, site.value(), tokens) : value_path<false>(d, site.value(), tokens);
if (!found)
{
// context is still empty; returning it keeps the copy elided (-Wnrvo)
// a value that is not found has no path, and with it no bytes
return context;
}
if (!tokens.empty())
tests/benchmarks/README.md
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@@ -138,6 +138,9 @@ the `View*` benchmarks (in `src/benchmarks_view.cpp`) are only built if the dire
Only benchmarks present in both result files are compared, so for older releases, either filter the benchmarks or
build that release's own `tests/benchmarks` against its own header.
To find out *which commit* changed a number, [`history/`](history/README.md) times one fixed program against the
header of every commit that changed it.
## Getting stable numbers
- Build and run both versions on the same machine with the same compiler and Google Benchmark, one right after the
tests/benchmarks/history/README.md
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@@ -0,0 +1,43 @@
# Performance history
The benchmarks in [`tests/benchmarks`](../README.md) compare two versions. The program here answers a different
question: *which commit* made something faster or slower. `history.cpp` is one fixed benchmark that uses only API
3.12.0 already has. `history.py` compiles it against the `single_include` of every first-parent commit that changed
`json.hpp` or `json_view.hpp`, runs all of them interleaved, and writes one CSV row per commit with its pull request.
The timeline in the post [How 3.13.0 got faster](https://json.nlohmann.me/home/blog/how_3_13_0_got_faster/) comes from
it. It is not built by CMake or run by CI.
## Workloads
| name | what it does |
|---|---|
| `parse_twitter`, `parse_citm`, `parse_canada` | `json::parse()` of a `std::string` (`citm_catalog.json` as distributed is indented by four spaces) |
| `parse_citm_compact` | the same with a minified copy of `citm_catalog.json` |
| `parse_twitter_ifstream` | `json::parse()` of an `std::ifstream`, opening the file included |
| `accept_twitter` | `json::accept()` |
| `view_parse_*` | `json_document::parse()`; only where the header has `json_view.hpp` |
| `dump_twitter`, `dump_citm`, `dump_canada`, `dump4_citm` | `dump()` and `dump(4)` |
| `from_cbor_twitter`, `to_cbor_twitter` | read and write CBOR |
| `copy_destroy_citm` | copy a parsed document and destroy the copy |
| `equal_citm` | copy a parsed document and compare it with `==` |
Each workload runs in batches of at least 20 ms; the program prints the median of 9 batches in microseconds per call.
## Running it
```sh
mkdir -p ~/history/data
cp <json_test_data>/nativejson-benchmark/{twitter,citm_catalog,canada}.json ~/history/data/
python3 history.py build --repo ../../.. --work ~/history # about 300 builds, a few minutes in parallel
caffeinate -i python3 history.py run --work ~/history --rounds 4 # about 1 h 45 min on an M1 Max (about 4 s per binary and round)
python3 history.py summarize --work ~/history > history.csv
```
`--extra DIR` adds one more header directory, such as an amalgamation of `develop` with open pull requests merged
in. `run` waits whenever the 1-minute load average is 4 or more.
## Reading the results
A single commit can move a workload by a few percent through code layout alone: the functions it did not touch
move to other addresses. Read a change as a step only if it is larger than that and stays. To check one, time the
two commits against each other with more rounds, or compare instruction counts.
tests/benchmarks/history/history.cpp
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@@ -0,0 +1,98 @@
// __ _____ _____ _____
// __| | __| | | | JSON for Modern C++ (supporting code)
// | | |__ | | | | | | version 3.12.0
// |_____|_____|_____|_|___| https://github.com/nlohmann/json
//
// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
// SPDX-License-Identifier: MIT
// One fixed benchmark, compiled against the json.hpp of every commit that changed it (see README.md).
// It uses only API that 3.12.0 has; the json_document rows exist only where the header has json_view.hpp.
// Usage: history <dir with twitter.json, citm_catalog.json, canada.json and citm_compact.json>
// Prints one line per workload: the name and the median of 9 batches in microseconds per call.
#include <nlohmann/json.hpp>
#if __has_include(<nlohmann/json_view.hpp>) && !defined(HISTORY_NO_VIEW)
#include <nlohmann/json_view.hpp>
#define HISTORY_VIEW 1
#endif
#include <algorithm>
#include <chrono>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
using nlohmann::json;
static std::string slurp(const std::string& p)
{
std::ifstream f(p, std::ios::binary);
std::stringstream s;
s << f.rdbuf();
return s.str();
}
static volatile std::size_t sink;
static void bench(const char* name, const std::function<std::size_t()>& f)
{
using clk = std::chrono::steady_clock;
sink = f(); // warm up
std::size_t n = 1;
for (;;)
{
auto t0 = clk::now();
for (std::size_t i = 0; i < n; ++i)
{
sink = f();
}
double dt = std::chrono::duration<double>(clk::now() - t0).count();
if (dt > 0.02)
{
break;
}
n *= 2;
}
std::vector<double> v;
for (int b = 0; b < 9; ++b)
{
auto t0 = clk::now();
for (std::size_t i = 0; i < n; ++i)
{
sink = f();
}
v.push_back(std::chrono::duration<double, std::micro>(clk::now() - t0).count() / n);
}
std::sort(v.begin(), v.end());
std::cout << name << ' ' << std::fixed << std::setprecision(3) << v[4] << '\n';
}
int main(int, char** argv)
{
std::string d = argv[1];
const std::string tw = slurp(d + "/twitter.json"), ci = slurp(d + "/citm_catalog.json"),
ca = slurp(d + "/canada.json"), cii = slurp(d + "/citm_compact.json");
const json jtw = json::parse(tw), jci = json::parse(ci), jca = json::parse(ca);
const std::vector<std::uint8_t> cbtw = json::to_cbor(jtw);
bench("parse_twitter", [&] { return json::parse(tw).size(); });
bench("parse_citm", [&] { return json::parse(ci).size(); });
bench("parse_canada", [&] { return json::parse(ca).size(); });
bench("parse_citm_compact", [&] { return json::parse(cii).size(); });
bench("parse_twitter_ifstream", [&] { std::ifstream f(d + "/twitter.json"); return json::parse(f).size(); });
bench("accept_twitter", [&] { return static_cast<std::size_t>(json::accept(tw)); });
#ifdef HISTORY_VIEW
bench("view_parse_twitter", [&] { const auto doc = nlohmann::json_document::parse(tw); return doc.root().size(); });
bench("view_parse_citm", [&] { const auto doc = nlohmann::json_document::parse(ci); return doc.root().size(); });
bench("view_parse_canada", [&] { const auto doc = nlohmann::json_document::parse(ca); return doc.root().size(); });
#endif
bench("dump_twitter", [&] { return jtw.dump().size(); });
bench("dump_citm", [&] { return jci.dump().size(); });
bench("dump_canada", [&] { return jca.dump().size(); });
bench("dump4_citm", [&] { return jci.dump(4).size(); });
bench("from_cbor_twitter", [&] { return json::from_cbor(cbtw).size(); });
bench("to_cbor_twitter", [&] { return json::to_cbor(jtw).size(); });
bench("copy_destroy_citm", [&] { json c = jci; return c.size(); });
bench("equal_citm", [&] { json c = jci; return static_cast<std::size_t>(c == jci); });
}
tests/benchmarks/history/history.py
Executable
+151
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@@ -0,0 +1,151 @@
#!/usr/bin/env python3
# __ _____ _____ _____
# __| | __| | | | JSON for Modern C++ (supporting code)
# | | |__ | | | | | | version 3.12.0
# |_____|_____|_____|_|___| https://github.com/nlohmann/json
#
# SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
# SPDX-License-Identifier: MIT
"""Time one fixed benchmark against the json.hpp of every commit that changed it.
Usage:
history.py build --repo REPO --work DIR [--from v3.12.0] [--to origin/develop] [--extra INCLUDE_DIR]
history.py run --work DIR [--rounds 4]
history.py summarize --work DIR [--repo REPO] > history.csv
build: lists the first-parent commits between --from and --to that changed single_include/nlohmann/json.hpp or
json_view.hpp, extracts single_include/ of each (and of --from itself), and compiles history.cpp against it into
DIR/bin/NNN, NNN being the line of the commit in DIR/commits.txt. --extra adds one more header directory at the end,
for example an amalgamation of develop with open pull requests merged in. It also writes the input files to DIR/data
(the nativejson-benchmark files from the test data, which must be in DIR/data already, plus a minified copy of
citm_catalog.json).
run: runs every binary once per round, in a new random order each round, and only while the 1-minute load average is
below 4. Output: DIR/res/NNN-R.txt.
summarize: the median over the rounds per binary and workload, as CSV with the commit, its date and its pull request.
Only the Python 3 standard library is used; a C++17 compiler (c++) and git are needed.
"""
import argparse
import concurrent.futures
import csv
import json
import os
import random
import re
import statistics
import subprocess
import sys
import time
from pathlib import Path
HERE = Path(__file__).resolve().parent
FLAGS = ["-std=c++17", "-O3", "-DNDEBUG", "-w"]
def git(repo, *args):
return subprocess.run(["git", "-C", str(repo), *args], check=True, capture_output=True, text=True).stdout
def build_one(work, idx, rev, repo):
hdr = work / "hdr" / idx
hdr.mkdir(parents=True, exist_ok=True)
if rev.startswith("dir:"):
subprocess.run(["cp", "-R", rev[4:] + "/nlohmann", str(hdr)], check=True)
else:
archive = subprocess.run(["git", "-C", str(repo), "archive", rev, "single_include/nlohmann"],
check=True, capture_output=True).stdout
subprocess.run(["tar", "-x", "-C", str(hdr), "--strip-components=1"], input=archive, check=True)
out = work / "bin" / idx
cmd = ["c++", *FLAGS, "-I", str(hdr), str(HERE / "history.cpp"), "-o", str(out)]
# json_view.hpp of the first commits that had it may not compile with history.cpp: time json.hpp alone then
if subprocess.run(cmd, capture_output=True).returncode != 0:
if subprocess.run(cmd[:-4] + ["-DHISTORY_NO_VIEW"] + cmd[-4:], capture_output=True).returncode != 0:
return "FAIL %s %s" % (idx, rev)
return None
def build(a):
work, repo = Path(a.work), Path(a.repo)
(work / "bin").mkdir(parents=True, exist_ok=True)
revs = [a.__dict__["from"]] + git(repo, "log", "--first-parent", "--reverse", "--format=%H",
"%s..%s" % (a.__dict__["from"], a.to), "--",
"single_include/nlohmann/json.hpp", "single_include/nlohmann/json_view.hpp").split()
if a.extra:
revs.append("dir:" + str(Path(a.extra).resolve()))
(work / "commits.txt").write_text("\n".join(revs) + "\n")
data = work / "data"
citm = json.loads((data / "citm_catalog.json").read_text(encoding="utf-8"))
(data / "citm_compact.json").write_text(json.dumps(citm, separators=(",", ":"), ensure_ascii=False), encoding="utf-8")
with concurrent.futures.ThreadPoolExecutor(os.cpu_count()) as ex:
for r in ex.map(lambda p: build_one(work, "%03d" % p[0], p[1], repo), enumerate(revs)):
if r:
print(r, file=sys.stderr)
def load():
out = subprocess.run(["sysctl", "-n", "vm.loadavg"], capture_output=True, text=True).stdout
return float(out.split()[1]) if out else os.getloadavg()[0]
def run(a):
work = Path(a.work)
(work / "res").mkdir(exist_ok=True)
bins = sorted(p.name for p in (work / "bin").iterdir())
for r in range(1, a.rounds + 1):
random.shuffle(bins)
for b in bins:
while load() >= 4:
time.sleep(15)
out = subprocess.run([str(work / "bin" / b), str(work / "data")], check=True, capture_output=True, text=True)
(work / "res" / ("%s-%d.txt" % (b, r))).write_text(out.stdout)
print("round %d done" % r, file=sys.stderr)
def summarize(a):
work = Path(a.work)
revs = (work / "commits.txt").read_text().split()
times, names = {}, []
for f in sorted((work / "res").glob("*.txt")):
idx = int(f.name.split("-")[0])
for line in f.read_text().splitlines():
name, us = line.split()
if name not in names:
names.append(name)
times.setdefault((idx, name), []).append(float(us))
w = csv.writer(sys.stdout, lineterminator="\n")
w.writerow(["index", "commit", "date", "pr", "subject"] + names)
for idx, rev in enumerate(revs):
if rev.startswith("dir:"):
sha, date, pr, subject = "candidate", "", "", "develop + open pull requests"
else:
sha, date, subject = git(a.repo, "log", "-1", "--format=%h%x09%cs%x09%s", rev).strip().split("\t")
m = re.search(r"\(#(\d+)\)$", subject)
pr = m.group(1) if m else ""
w.writerow([idx, sha, date, pr, subject] +
["%.3f" % statistics.median(times[(idx, n)]) if (idx, n) in times else "" for n in names])
def main():
p = argparse.ArgumentParser(description=__doc__.splitlines()[0])
sub = p.add_subparsers(dest="cmd", required=True)
b = sub.add_parser("build")
b.add_argument("--repo", required=True)
b.add_argument("--work", required=True)
b.add_argument("--from", default="v3.12.0")
b.add_argument("--to", default="origin/develop")
b.add_argument("--extra")
r = sub.add_parser("run")
r.add_argument("--work", required=True)
r.add_argument("--rounds", type=int, default=4)
s = sub.add_parser("summarize")
s.add_argument("--work", required=True)
s.add_argument("--repo", default=str(HERE.parents[2]))
a = p.parse_args()
{"build": build, "run": run, "summarize": summarize}[a.cmd](a)
if __name__ == "__main__":
main()
tests/benchmarks/json_view/others/README.md
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@@ -0,0 +1,249 @@
# json_document against other JSON libraries
[`compare.py`](../compare.py) compares `json_document` with yyjson, simdjson and Boost.JSON. The programs here add
sonic-cpp, RapidJSON and Glaze in C++, and sonic-rs, simd-json and serde_json in Rust, for the post
[How 3.13.0 got faster](https://json.nlohmann.me/home/blog/how_3_13_0_got_faster/#how-it-compares). They are not
built by CMake or run by CI.
## What is measured
The programs compare **use cases**, not library functions. A library may implement a use case in every reasonable way
(another API, SAX events, in-situ parsing, a struct binding); each such way is a *variant*, named
`<library>: <variant>` (`yyjson: insitu (copy)`, `RapidJSON: SAX`, `nlohmann json_document: accept`). The report shows
each library's fastest correct variant. `nlohmann json` (`basic_json`) and `nlohmann json_document` (with
`json_view`) count as two libraries.
| use case | what it does |
|---|---|
| `validate` | is this text valid JSON? returns a bool |
| `sum` | visit every value, convert every number, touch every string and key; sum all numbers in document order |
| `select` | read a few fields of every record (the fields of `bench_view.cpp`, e.g. `id`, `user.screen_name` and `retweet_count` of every status) |
| `edit` | change some values of every record and write the document as compact JSON (see below) |
| `minify` | text in, compact text out |
| `write` | write a document parsed beforehand as compact JSON; only the writing is timed |
The edits:
| file | edit |
|---|---|
| `twitter.json` | for every element of `statuses`: `retweet_count` + 1, erase `entities`, add `"seen": true` |
| status | the same edit on the one status |
| `citm_catalog.json` | for every element of `performances`: `start` + 1, erase `seatMapImage`, add `"seen": true` |
| `canada.json` | `features[0].properties.name` = `"Kanada"`; append `[0.5,0.25]` to the first ring (`geometry.coordinates[0]`) of every feature |
| `jeopardy.json` | for every record: `value` = `null`, erase `air_date`, add `"seen": true` |
The files are `twitter.json`, `citm_catalog.json`, `canada.json` (nativejson-benchmark), `jeopardy.json`, the first
status of `twitter.json` (`status`; written by `json::dump()`, timed in batches of 200), and `twitter_min` and
`citm_catalog_min`: `twitter.json` and `citm_catalog.json` with all whitespace outside strings removed, built in memory at
startup by the same small function in both programs (`strip_ws`; the bytes inside strings are untouched). The minified
files use the select and edit of their originals.
### Input contract
The input is a `const std::string` holding the file, with at least 64 bytes of spare capacity (`reserve`), so libraries
that need padding (simdjson) can use it without a copy. A variant that modifies the input (in-situ parsing: yyjson
`YYJSON_READ_INSITU`, RapidJSON `ParseInsitu`, simd-json) copies it inside the timed call; its name says `(copy)`.
The C++ in-situ variants also run as `(copy untimed)`: the copy is made before the timer starts and freed after it
stops, as for a program that reads a file into a buffer it owns and no longer needs. They are reported but never
chosen as a library's best. `json_document`'s `parse_copy` is the opposite case: a document that owns a copy of its
text.
Each timed call starts from the text and frees everything it built, except variants named `(reused)` or
`(reused allocator)`, which keep a parser, document or allocator across calls (simdjson's reused parsers,
`json_document::read()`, Boost.JSON's reset `parser` and `basic_parser`, yyjson's dynamic allocator, RapidJSON's
user-buffer allocators, simd-json's buffers). These are reported but never chosen as a library's best;
`summarize.py` reports each library's best reused variant separately. In Rust, the input is the file as bytes (`&[u8]`), so every library
has to validate UTF-8 itself.
### Correctness rules
Before timing, every variant runs on the file and must produce the right result:
- `validate`: `true`.
- `sum`: the same number of values, the same number of string and key bytes, and a sum of all numbers that is
bit-identical to `json_document`'s (document order), so every number is converted exactly; variants that visit
objects in another order (`nlohmann json: parse`, simd-json and serde_json values) are compared within 1e-9.
- `select`: the same value as `json_document`. A variant that does not convert numbers (`(raw numbers)`,
`(numbers: none)`) has to convert the numbers it selects exactly itself.
- `edit`, `minify`, `write`: the output, read with `json::parse`, compares equal (`==`) to the expected document (for
`edit`, the edit applied to a `json` value; floats compare exactly, so every float must be written exactly). In
Rust, `serde_json::Value` (with `float_roundtrip`) is the reference.
A variant that gives a wrong result on a file, or crashes on it, is printed as
`excluded: <file> <use case> | <variant> | <reason>` and not timed.
### Validation levels
Except for `write`, every variant is also probed with four malformed inputs derived from each file: the file
truncated by one byte (after trailing whitespace), the file followed by ` ]x` (trailing garbage), a stray `,` before
the first `}` (before the last `]` in a file without objects), and a `0xFF` byte inside a string value (the first in
the second half of the file, or the last one; never a key, so that a variant that accepts the byte still finds the
keys it looks up; a file without string values gets no `0xFF` probe). The probes run in a child process, so a crash is caught. The result is the
variant's *validation level*, printed in its cell (`sonic-cpp: Document [no UTF-8] 380.1us`):
| level | meaning |
|---|---|
| `full` | rejects all four probes |
| `no UTF-8` | rejects the structural probes, accepts the `0xFF` byte |
| `partial` | accepts the truncated input, the trailing garbage or the stray comma, or crashes on any probe |
| `n/a` | `write`: there is no input to validate (counts as `full`) |
What a variant accepts is printed as `level: <file> <use case> | <variant> | <level> | <what>`. A variant's level in
the summary is the worst it got for any file. UTF-8 validation is enabled where a library has a switch (RapidJSON
`kParseValidateEncodingFlag`; the `(no encoding check)` variants leave it off). sonic-cpp 1.0.2 cannot validate
UTF-8 at all; serde_json does not validate UTF-8 in the parts it skips (`IgnoredAny`, unknown struct fields) unless
the input is checked with `std::str::from_utf8` first (the `from_utf8 + ...` variants).
The sum and select reference values are printed as `check ... reference:` lines; `summarize.py` warns if the C++ and
Rust logs disagree.
The four probes do not cover everything a parser can get wrong. `--conformance <dir>` runs every `validate` variant
on every file of [JSONTestSuite](https://github.com/nst/JSONTestSuite)'s `test_parsing` (json_test_data has it as
`nst_json_testsuite2/test_parsing`) and prints `conformance: <file> | <variant> | accepted|rejected|crashed`; a `y_`
file must be accepted, an `n_` file rejected, and an `i_` file may go either way. bench_all runs each call in a child
process (a call that hangs for 60 s counts as crashed); a stack overflow aborts bench_rs, so `conformance-rs.sh`
runs it one file per process and, for a file that aborts, one variant per process (`CONF_VARIANT`). The trailing
garbage probe was added after this check: Glaze reads anything after the value unless `validate_trailing_whitespace`
is set.
### Variants
Level on the Mac in brackets where it is not `full` (`P` = partial, `U` = no UTF-8); every `write` variant is `n/a`.
| library | validate | sum | select | edit | minify | write |
|---|---|---|---|---|---|---|
| nlohmann json_document | `accept`, `parse`, `read (reused)` | `parse`, `parse_copy`, `read (reused)` | `parse`, `parse_copy`, `structs (from_json)`, `read (reused)` | `editable`, `editable (source numbers)` (`json_editable_document`: set/erase, `dump` with `number_format::source`) | `parse + dump`, `parse_copy + dump`, `parse + dump (source numbers)`, `read + dump (reused)` | `dump`, `dump (source numbers)` |
| nlohmann json | `accept`, `parse` | `parse`, `sax` | `parse`, `structs (from_json)` | `parse`, `ordered_json` | `parse + dump` | `dump` |
| yyjson | `read`, `insitu (copy)`, `insitu (copy untimed)`, `read (raw numbers)`, `read (reused allocator)` | `read`, `insitu (copy)`, `insitu (copy untimed)`, `read (reused allocator)` | `read`, `insitu (copy)`, `insitu (copy untimed)`, `read (raw numbers)`, `read (reused allocator)` | `mut copy`, `insitu (copy) + mut copy` (`yyjson_doc_mut_copy`), `insitu (copy untimed) + mut copy` | `read + write`, `insitu (copy) + write`, `insitu (copy untimed) + write`, `read (raw numbers) + write`, `read + write (reused allocator)` | `write` |
| simdjson | `DOM`, `DOM (reused)` | `DOM`, `DOM (reused)`, `On-Demand`, `On-Demand (reused)` | `DOM`, `DOM (reused)`, `On-Demand` [P], `On-Demand (reused)` [P], `On-Demand structs` [P], `On-Demand (key selectors)` [P] | n/a (no mutable document) | `DOM + to_string`, `DOM (reused) + to_string`, `minify` [P] | `to_string` |
| RapidJSON | `SAX` (null handler), `Document`, `insitu (copy)`, `insitu (copy untimed)`, `SAX (string stream)`, `SAX (default precision)`, `SAX (string stream, default precision)`, `SAX (raw numbers)`, `Document (reused allocator)` | `Document`, `SAX`, `insitu (copy)`, `insitu (copy untimed)`, `SAX (string stream)`, `Document (reused allocator)` | `Document`, `insitu (copy)`, `insitu (copy untimed)`, `Document (string stream)`, `Document (raw numbers)`, `Document (reused allocator)` | `Document`, `insitu (copy)`, `insitu (copy untimed)`, `Document (string stream)` | `Document + Writer`, `SAX to Writer`, `SAX to Writer (string stream)`, `SAX to Writer (raw numbers)`, `Document + Writer (reused allocator)` | `Writer` |
| RapidJSON, `(no encoding check)` | the same [U] | the same [U] | the same [U] | the same [U] | the same [U] | |
| sonic-cpp | `Document` [U] | `Document` [U] | `Document` [U] | `Document` [U] | `Document + Serialize` [U] | `Serialize` |
| Glaze | `validate_json`, `generic` [P], `generic (double)` [P], `generic (strict)`, `generic (double, strict)` | `generic` [P], `generic (double)` [P], `generic (strict)`, `generic (double, strict)`, `lazy_json` [P], `lazy_json (string_view)` (x) | `structs` [P], `structs (validate_skipped)`, `generic` [P], `generic (double)` [P], `generic (strict)`, `generic (double, strict)`, `lazy_json` [P], `lazy_json (string_view)` (x) | `generic` [P], `generic (double)` (x), `generic (strict)`, `generic (double, strict)` (x) | `generic` [P], `generic (double)` (x), `generic (strict)`, `generic (double, strict)` (x), `minify_json` [P] | `generic`, `generic (double)` (x), `generic (strict)`, `generic (double, strict)` (x) |
| Boost.JSON | `SAX` (`basic_parser`), `parse`, `SAX (numbers: none)`, `parse (numbers: none)`, `SAX (reused)`, `parser (reused)` | `parse`, `SAX`, `SAX (reused)`, `parser (reused)` | `parse`, `parse (numbers: none)` (x), `parser (reused)`, `parse_into structs` | `parse` | `parse + serialize`, `parser (reused) + serialize` | `serialize` |
| serde_json | `IgnoredAny` [U], `from_utf8 + IgnoredAny`, `Value` | `visitor`, `Value` | `structs` [U], `from_utf8 + structs`, `Value` | `Value` | `Value` | `Value` |
| sonic-rs | `IgnoredAny`, `Value` | `visitor`, `Value` | `structs`, `Value` | `Value` | `Value` | `Value` |
| simd-json | `tape (copy)`, `borrowed (copy)`, `tape (reused)` | `visitor (copy)`, `borrowed (copy)`, `borrowed (reused)` | `structs (copy)`, `borrowed (copy)` | `owned (copy)`, `borrowed (copy)` | `borrowed (copy)` | `borrowed` |
(x): excluded for a wrong result on some file, and so in the summary for every file: `generic (double)` loses the
64-bit ids of `twitter.json` when it writes them; `lazy_json (string_view)` reads the raw bytes of a string, so escaped
strings have the wrong length (`sum`, and the `"` in 19,077 `jeopardy.json` categories in `select`);
`numbers: none` reads every number as 0.
`structs` read into types that declare only the fields `select` uses and hold the same data: nlohmann/json's
`from_json()` of the `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE` macro (from a `json` value or from a `json_document`'s view)
reads into `nsel`, where the arrays and objects that are only counted (`seatCategories`, the values of `events`,
`coordinates`) are a `count_only` holding their size. Glaze reads into the same types (reflected; `count_only` has a
reader that skips and counts the elements; `error_on_unknown_keys = false`, and with `validate_skipped` to validate
what it skips), and so does simdjson On-Demand (`get<T>()` with `tag_invoke`, fields in document order,
`count_elements()`/`count_fields()`). serde derive reads into the same fields with a `Count` that counts with
`IgnoredAny` (and a `BTreeMap`, as `std::map`). Boost.JSON's `parse_into` has no type that skips any value, so its
counted members only count what it converts into them: `seatCategories` into a counting sequence of an empty described
struct, `coordinates` into three levels of counting sequences down to `double`, and the `events` values into an empty
described struct, so their members are not counted. `key selectors` are simdjson 5.0's `object::for_each<"k1",
...>`, which walks each object once and matches keys with a compile-time perfect hash. `visitor` is a serde
`DeserializeSeed` that sums without building a value; `SAX` and `sax` are the libraries' event interfaces with a
summing (or, for `validate`, an empty) handler. RapidJSON parses with `kParseFullPrecisionFlag` (correctly rounded
floats; without it, sums and written floats are wrong) and Boost.JSON with `number_precision::precise`, as every other
library rounds correctly by default; only `validate`, which reads no number, also has RapidJSON's `(default
precision)`. RapidJSON's `Document::Parse(data, size)` and our `SAX` read through `EncodedInputStream<MemoryStream>`;
`(string stream)` reads the NUL-terminated string through `StringStream`, as `Document::Parse(const char*)` does,
where RapidJSON has a SIMD string scanner (used only without `kParseValidateEncodingFlag`).
Variants named `(raw numbers)` or `(numbers: none)` use a library's mode that validates numbers without converting
them (yyjson `YYJSON_READ_NUMBER_AS_RAW`, RapidJSON `kParseNumbersAsStringsFlag`, Boost.JSON
`number_precision::none`), as `json_document` converts a number only when it is read. In `select` they convert the
selected numbers themselves (`std::from_chars`); Boost.JSON's `none` leaves no number text in its DOM, so it cannot.
yyjson writes a raw number verbatim, so `read (raw numbers) + write` is exact. sonic-cpp 1.0.2 has no parse flags,
and Glaze's generic DOM has no raw number mode (`validate_json` converts no number anyway). `(reused allocator)`:
yyjson's `yyjson_alc_dyn_new()`, RapidJSON's `MemoryPoolAllocator`s over user buffers for the values and the parse
stack; Boost.JSON's `parser (reused)` builds its value in a `monotonic_resource` over a buffer kept across calls. These
buffers grow after a call that needed more, so the timed calls do not allocate. `generic (double)` is `glz::generic`,
which stores every number as a double. The Glaze `(strict)` variants read with `validate_trailing_whitespace` (else
Glaze accepts anything after the value) and write with `escape_control_characters` (else Glaze writes a string's
control characters, e.g. U+0001, unescaped, which is not JSON; `gsoc-2018.json` has some).
| library | version | notes |
|---|---|---|
| `json_document`, `json` | this checkout | |
| yyjson | 0.13.0 | |
| simdjson | 5.1.1 | the single-header files of the tag |
| sonic-cpp | 1.0.2 | |
| RapidJSON | master 24b5e7a8b27f (2025-02-05) | |
| Glaze | 9.1.0 | `generic_u64` and `generic` (owning DOMs, member order kept) |
| Boost.JSON | 1.92.0 | monotonic resource |
| sonic-rs, simd-json, serde_json | see `rust/Cargo.lock` | serde_json with `float_roundtrip` |
SHA-256 of the downloads:
```
55f8a675397c505f9bee6c160e1c26b0085868f185d04d7a7727531fdbff4bd4 glaze-v9.1.0.tar.gz
30edf9e47c417f653546c39295fdb66ba5f89fb37eb3780122c6ee66605e5837 sonic-cpp v1.0.2.tar.gz
2d2601a82d2d3b7e143a3c8d43ef616671391034bc46891a9816b79cf2d3e7a8 rapidjson 24b5e7a8b27f42fa16b96fc70aade9106cf7102f.tar.gz
34e0f62a2bc11ab20d601e8ca1cc2b2079503aa45119a19133d89d19b94a0fae yyjson 0.13.0.tar.gz
f3e5ee5f39051960b5ce65762ee4b6919caf270675eb52240ebd92f21a5bcefd simdjson v5.1.1 singleheader/simdjson.h
3ea5f501cef6c2e16e28095b566feeb56021ca473aaf50aad32102f45d734195 simdjson v5.1.1 singleheader/simdjson.cpp
c4a3b310ddd2472416e091067166b0713be97c63f38c212c484ada022fd296ce boost_1_92_0.tar.gz
```
### Timing
Every variant of a use case runs interleaved in every round, each timed call after an untimed one, and the best
round is reported (the method of `bench_view.cpp`). The order of the variants changes in every round (a shuffle with a
fixed seed; the first round keeps the listed order): on the Mac, a variant's time can depend on which variant ran
before it, by up to 15 %, and a fixed order would give each variant the same neighbour in every round. `jeopardy.json` (50 MB) gets a fifth of the rounds (at least 3,
at most the given number).
## Building and running
All libraries except yyjson and simdjson are used header-only. With the downloads unpacked into `DL`
(`compare.py --download` fetches yyjson and Boost into its build directory, and simdjson 4.6.11, so take simdjson
5.1.1's `singleheader` files from its tag):
```sh
cc -O3 -DNDEBUG -c $DL/yyjson-0.13.0/src/yyjson.c -o yyjson.o
c++ -std=c++17 -O3 -DNDEBUG -c $DL/simdjson-5.1.1/singleheader/simdjson.cpp -o simdjson.o
c++ -std=c++23 -O3 -DNDEBUG -DRAPIDJSON_NEON \
-I ../../../../include -I $DL/yyjson-0.13.0/src -I $DL/simdjson-5.1.1/singleheader -I $DL/boost_1_92_0 \
-I $DL/glaze-9.1.0/include -I $DL/rapidjson/include -I $DL/sonic/include \
bench_all.cpp yyjson.o simdjson.o -o bench_all
./bench_all <json_test_data> 30 > mac-cpp-1.log
cd rust && cargo build --release --locked && ./target/release/bench_rs <json_test_data> 30 > ../mac-rs-1.log
python3 summarize.py mac-cpp-*.log --rust mac-rs-*.log --json mac.json
```
With GCC 16 and Homebrew Clang on macOS, build the three steps with the same flags plus
`--sysroot=$(xcrun --show-sdk-path)` (`gcc-16`, `g++-16`) or `-isysroot $(xcrun --show-sdk-path)`
(`/opt/homebrew/opt/llvm/bin/clang`, `clang++`). The key selectors and simdjson's `tag_invoke` need C++20, so
`bench_all.cpp` needs `-std=c++20` or newer.
Both programs take `<json_test_data> [rounds] [file] [use case]`: `./bench_all <json_test_data> 30 canada edit` times
only the edit of `canada.json`; `""` stands for all files; the file names are `twitter`, `citm_catalog`, `canada`,
`jeopardy`, `status`, `twitter_min` and `citm_catalog_min`. The checks cover only the selected files and use cases.
bench_all uses `fork()` for the probes and the crash check (macOS, Linux).
`--files <dir> [rounds] [file] [use case]` runs `validate`, `sum`, `minify` and `write` (`select` and `edit` are
defined only for the files above) on every `*.json` file of a directory, named by their stem; files under 500 KB are
timed in batches of about 500 KB of input. It is meant for files the libraries were not tuned on, such as the
`jsonexamples` of [simdjson-data](https://github.com/simdjson/simdjson-data) without `twitter.json`,
`citm_catalog.json` and `canada.json`. `summarize.py` takes such logs as well.
On x86-64, use `-march=haswell -DRAPIDJSON_SSE42` instead of `-DRAPIDJSON_NEON` (sonic-cpp needs AVX2), pin the
process to one core, and time one file per process. Glaze 9 needs `std::expected`, which Clang 18 and older cannot
use from GCC 13's standard library (Clang 19 and newer can); `-DBENCH_NO_GLAZE=1` builds without it. For Rust, build
with `RUSTFLAGS="-C target-cpu=haswell"` to match `-march=haswell`.
## Reading the results
A log line holds the file, the use case, and one cell per variant: `| <library>: <variant> [<level>] <time>us
(<ratio>x)`, the ratio relative to the first variant of the line. `summarize.py` prints, for every use case and file,
(a) per library the best `full` variant and, if faster, the best variant at any level, with their ratios to the best
`full` `nlohmann json_document` variant (`(reused)` and `(reused allocator)` variants are never a library's best; a
`reused:` line below the library shows its best reused variant in the same way), (b) all variants with their levels
and times, and (c) what the variants below `full` accept, and the excluded variants. `--json` writes
`{use case: {file: {library: {"best": {"variant", "us", "level"} or null, "best_any": {...}, "best_reused": {...} or
null, "best_reused_any": {...} or null, "variants": {variant: {"us", "level"}}, "excluded": {...}}}}}` for the chart
scripts (`best_reused`: the best full reused variant; `best_reused_any`: at any level). Several logs are combined by taking each cell's best
time; a variant excluded for one file is left out for every file of that use case.
On a shared machine, differences of a few percent are noise: run twice and compare.
tests/benchmarks/json_view/others/bench_all.cpp
+3562
View File
File diff suppressed because it is too large. Load diff
tests/benchmarks/json_view/others/conformance-rs.sh
Executable
+14
View File
@@ -0,0 +1,14 @@
#!/bin/bash
# the Rust conformance run, one file per process; a file that aborts the process (stack overflow) is rerun one
# variant per process, and a variant that aborts is printed as crashed
B=$1; D=$2
VARS=$($B --conformance $D 1 y_structure_lonely_int.json | sed -n 's/^conformance: [^|]* | \(.*\) | [a-z]*$/\1/p')
for f in $(ls $D | grep '\.json$'); do
out=$($B --conformance $D 1 "$f" 2>/dev/null)
if [ $? = 0 ]; then echo "$out" | grep '^conformance:'; continue; fi
while IFS= read -r v; do
o=$(CONF_VARIANT="$v" $B --conformance $D 1 "$f" 2>/dev/null)
if [ $? = 0 ]; then echo "$o" | grep '^conformance:'; else echo "conformance: $f | $v | crashed"; fi
done <<< "$VARS"
done
echo "done: conformance"
tests/benchmarks/json_view/others/rust/Cargo.lock
Generated
+627
View File
@@ -0,0 +1,627 @@
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# It is not intended for manual editing.
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tests/benchmarks/json_view/others/rust/Cargo.toml
+15
View File
@@ -0,0 +1,15 @@
[package]
name = "bench_rs"
version = "0.1.0"
edition = "2021"
[dependencies]
simd-json = "*"
sonic-rs = "*"
serde = { version = "1", features = ["derive"] }
serde_json = { version = "*", features = ["float_roundtrip"] }
[profile.release]
opt-level = 3
lto = "fat"
codegen-units = 1
tests/benchmarks/json_view/others/rust/src/main.rs
+968
View File
@@ -0,0 +1,968 @@
// __ _____ _____ _____
// __| | __| | | | JSON for Modern C++ (supporting code)
// | | |__ | | | | | | version 3.12.0
// |_____|_____|_____|_|___| https://github.com/nlohmann/json
//
// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
// SPDX-License-Identifier: MIT
// The Rust counterpart of bench_all.cpp: the same use cases (validate, sum, select, edit, minify, write), files,
// checks (right result; validation level from malformed-input probes) and timing method (every variant interleaved in every round, each
// timed call after an untimed one, best round); see README.md. The input is the file as bytes (&[u8]); simd-json
// parses in place, so its variants copy the input inside the timed call.
//
// Usage: bench_rs <json_test_data dir> [rounds] [document] [use case]
use serde::de::{DeserializeOwned, DeserializeSeed, IgnoredAny, MapAccess, SeqAccess, Visitor};
use simd_json::prelude::*;
use sonic_rs::{JsonContainerTrait, JsonValueMutTrait, JsonValueTrait};
use std::cell::RefCell;
use std::panic::{catch_unwind, AssertUnwindSafe};
use std::time::Instant;
#[derive(Default, Debug, Clone, Copy)]
struct Stats {
num: f64,
str_: usize,
nodes: usize,
}
// ---- sum: walk a DOM, visit every value, convert every number, touch every string and key
fn walk_simd(v: &simd_json::BorrowedValue, st: &mut Stats) {
st.nodes += 1;
if let Some(o) = v.as_object() {
for (k, x) in o.iter() {
st.str_ += k.len();
walk_simd(x, st);
}
} else if let Some(a) = v.as_array() {
for x in a.iter() {
walk_simd(x, st);
}
} else if let Some(s) = v.as_str() {
st.str_ += s.len();
} else if v.is_u64() {
st.num += v.as_u64().unwrap() as f64;
} else if v.is_i64() {
st.num += v.as_i64().unwrap() as f64;
} else if v.is_f64() {
st.num += v.as_f64().unwrap();
}
}
fn walk_sonic(v: &sonic_rs::Value, st: &mut Stats) {
st.nodes += 1;
if let Some(o) = v.as_object() {
for (k, x) in o.iter() {
st.str_ += k.len();
walk_sonic(x, st);
}
} else if let Some(a) = v.as_array() {
for x in a.iter() {
walk_sonic(x, st);
}
} else if let Some(s) = v.as_str() {
st.str_ += s.len();
} else if v.is_number() {
if let Some(u) = v.as_u64() {
st.num += u as f64;
} else if let Some(i) = v.as_i64() {
st.num += i as f64;
} else {
st.num += v.as_f64().unwrap();
}
}
}
fn walk_serde(v: &serde_json::Value, st: &mut Stats) {
st.nodes += 1;
match v {
serde_json::Value::Object(o) => {
for (k, x) in o.iter() {
st.str_ += k.len();
walk_serde(x, st);
}
}
serde_json::Value::Array(a) => {
for x in a.iter() {
walk_serde(x, st);
}
}
serde_json::Value::String(s) => st.str_ += s.len(),
serde_json::Value::Number(n) => {
if let Some(u) = n.as_u64() {
st.num += u as f64;
} else if let Some(i) = n.as_i64() {
st.num += i as f64;
} else {
st.num += n.as_f64().unwrap();
}
}
_ => {}
}
}
// the same visit without a DOM: a serde visitor, driven by any serde deserializer, in document order
struct Sum<'a>(&'a mut Stats);
struct Key<'a>(&'a mut Stats);
impl<'de> DeserializeSeed<'de> for Sum<'_> {
type Value = ();
fn deserialize<D: serde::Deserializer<'de>>(self, d: D) -> Result<(), D::Error> {
d.deserialize_any(self)
}
}
impl<'de> Visitor<'de> for Sum<'_> {
type Value = ();
fn expecting(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
f.write_str("a JSON value")
}
fn visit_unit<E: serde::de::Error>(self) -> Result<(), E> {
self.0.nodes += 1;
Ok(())
}
fn visit_bool<E: serde::de::Error>(self, _: bool) -> Result<(), E> {
self.0.nodes += 1;
Ok(())
}
fn visit_i64<E: serde::de::Error>(self, v: i64) -> Result<(), E> {
self.0.nodes += 1;
self.0.num += v as f64;
Ok(())
}
fn visit_u64<E: serde::de::Error>(self, v: u64) -> Result<(), E> {
self.0.nodes += 1;
self.0.num += v as f64;
Ok(())
}
fn visit_f64<E: serde::de::Error>(self, v: f64) -> Result<(), E> {
self.0.nodes += 1;
self.0.num += v;
Ok(())
}
fn visit_str<E: serde::de::Error>(self, v: &str) -> Result<(), E> {
self.0.nodes += 1;
self.0.str_ += v.len();
Ok(())
}
fn visit_seq<A: SeqAccess<'de>>(self, mut a: A) -> Result<(), A::Error> {
let st = self.0;
st.nodes += 1;
while a.next_element_seed(Sum(&mut *st))?.is_some() {}
Ok(())
}
fn visit_map<A: MapAccess<'de>>(self, mut a: A) -> Result<(), A::Error> {
let st = self.0;
st.nodes += 1;
while a.next_key_seed(Key(&mut *st))?.is_some() {
a.next_value_seed(Sum(&mut *st))?;
}
Ok(())
}
}
impl<'de> DeserializeSeed<'de> for Key<'_> {
type Value = ();
fn deserialize<D: serde::Deserializer<'de>>(self, d: D) -> Result<(), D::Error> {
d.deserialize_str(self)
}
}
impl<'de> Visitor<'de> for Key<'_> {
type Value = ();
fn expecting(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
f.write_str("a key")
}
fn visit_str<E: serde::de::Error>(self, v: &str) -> Result<(), E> {
self.0.str_ += v.len();
Ok(())
}
}
fn sum_serde(s: &[u8], st: &mut Stats) -> bool {
let mut de = serde_json::Deserializer::from_slice(s);
Sum(st).deserialize(&mut de).is_ok() && de.end().is_ok()
}
fn sum_sonic(s: &[u8], st: &mut Stats) -> bool {
let mut de = sonic_rs::Deserializer::from_slice(s);
Sum(st).deserialize(&mut de).is_ok() && de.end().is_ok()
}
fn sum_simd(s: &[u8], st: &mut Stats) -> bool {
let mut b = s.to_vec();
match simd_json::Deserializer::from_slice(&mut b) {
Ok(mut de) => Sum(st).deserialize(&mut de).is_ok(),
Err(_) => false,
}
}
// ---- select: read a few fields of every record (the fields of bench_view.cpp)
// on a DOM; serde_json's is the reference
macro_rules! pick_value {
($fname:ident, $t:ty) => {
fn $fname(name: &str, r: &$t) -> f64 {
fn size(v: &$t) -> usize {
if let Some(a) = v.as_array() {
a.len()
} else {
v.as_object().unwrap().len()
}
}
fn status(acc: &mut f64, s: &$t) {
*acc += s["id"].as_u64().unwrap() as f64;
*acc += s["user"]["screen_name"].as_str().unwrap().len() as f64;
*acc += s["retweet_count"].as_i64().unwrap() as f64;
}
let mut acc = 0.0;
match name {
"twitter" => {
for s in r["statuses"].as_array().unwrap().iter() {
status(&mut acc, s);
}
}
"status" => status(&mut acc, r),
"citm_catalog" => {
for p in r["performances"].as_array().unwrap().iter() {
acc += (p["id"].as_u64().unwrap() + p["eventId"].as_u64().unwrap() + size(&p["seatCategories"]) as u64) as f64;
}
acc += size(&r["events"]) as f64;
}
"canada" => {
let g = &r["features"][0]["geometry"];
acc += (r["type"].as_str().unwrap().len() + g["type"].as_str().unwrap().len() + size(&g["coordinates"])) as f64;
}
"jeopardy" => {
for q in r.as_array().unwrap().iter() {
acc += if q["round"].as_str().unwrap() == "Final Jeopardy!" { 1.0 } else { 0.0 };
acc += q["category"].as_str().unwrap().len() as f64;
}
}
_ => {}
}
acc
}
};
}
pick_value!(pick_serde, serde_json::Value);
pick_value!(pick_sonic, sonic_rs::Value);
pick_value!(pick_simd, simd_json::BorrowedValue<'_>);
// into structs that declare only the fields the selection uses, the same data as nlohmann/json's from_json() structs in
// bench_all.cpp (nsel); unknown keys are skipped; Count counts the elements of an array or the members of an object
// (nlohmann's count_only)
mod sel {
use serde::de::{Deserializer, IgnoredAny, MapAccess, SeqAccess, Visitor};
use serde::Deserialize;
use std::collections::BTreeMap;
pub struct Count(pub usize);
impl<'de> Deserialize<'de> for Count {
fn deserialize<D: Deserializer<'de>>(d: D) -> Result<Count, D::Error> {
struct V;
impl<'de> Visitor<'de> for V {
type Value = Count;
fn expecting(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
f.write_str("an array or an object")
}
fn visit_seq<A: SeqAccess<'de>>(self, mut a: A) -> Result<Count, A::Error> {
let mut n = 0;
while a.next_element::<IgnoredAny>()?.is_some() {
n += 1;
}
Ok(Count(n))
}
fn visit_map<A: MapAccess<'de>>(self, mut a: A) -> Result<Count, A::Error> {
let mut n = 0;
while a.next_entry::<IgnoredAny, IgnoredAny>()?.is_some() {
n += 1;
}
Ok(Count(n))
}
}
d.deserialize_any(V)
}
}
#[derive(Deserialize)]
pub struct User {
pub screen_name: String,
}
#[derive(Deserialize)]
pub struct Status {
pub id: u64,
pub user: User,
pub retweet_count: i64,
}
#[derive(Deserialize)]
pub struct Twitter {
pub statuses: Vec<Status>,
}
#[derive(Deserialize)]
pub struct Performance {
pub id: u64,
#[serde(rename = "eventId")]
pub event_id: u64,
#[serde(rename = "seatCategories")]
pub seat_categories: Count,
}
#[derive(Deserialize)]
pub struct Citm {
pub events: BTreeMap<String, Count>,
pub performances: Vec<Performance>,
}
#[derive(Deserialize)]
pub struct Geometry {
#[serde(rename = "type")]
pub type_: String,
pub coordinates: Count,
}
#[derive(Deserialize)]
pub struct Feature {
pub geometry: Geometry,
}
#[derive(Deserialize)]
pub struct Canada {
#[serde(rename = "type")]
pub type_: String,
pub features: Vec<Feature>,
}
#[derive(Deserialize)]
pub struct Question {
pub category: String,
pub round: String,
}
}
trait De {
fn de<T: DeserializeOwned>(s: &[u8]) -> Option<T>;
}
struct SerdeJson;
struct SerdeJsonStr; // checks UTF-8 with std::str::from_utf8 first, then reads from the &str
struct SonicRs;
struct SimdJson;
impl De for SerdeJson {
fn de<T: DeserializeOwned>(s: &[u8]) -> Option<T> {
serde_json::from_slice(s).ok()
}
}
impl De for SerdeJsonStr {
fn de<T: DeserializeOwned>(s: &[u8]) -> Option<T> {
serde_json::from_str(std::str::from_utf8(s).ok()?).ok()
}
}
impl De for SonicRs {
fn de<T: DeserializeOwned>(s: &[u8]) -> Option<T> {
sonic_rs::from_slice(s).ok()
}
}
impl De for SimdJson {
fn de<T: DeserializeOwned>(s: &[u8]) -> Option<T> {
let mut b = s.to_vec();
simd_json::serde::from_slice(&mut b).ok()
}
}
fn pick_structs<D: De>(name: &str, s: &[u8]) -> Option<f64> {
fn status(acc: &mut f64, x: &sel::Status) {
*acc += x.id as f64;
*acc += x.user.screen_name.len() as f64;
*acc += x.retweet_count as f64;
}
let mut acc = 0.0;
match name {
"twitter" => {
let t: sel::Twitter = D::de(s)?;
for x in &t.statuses {
status(&mut acc, x);
}
}
"status" => {
let x: sel::Status = D::de(s)?;
status(&mut acc, &x);
}
"citm_catalog" => {
let c: sel::Citm = D::de(s)?;
for p in &c.performances {
acc += (p.id + p.event_id + p.seat_categories.0 as u64) as f64;
}
acc += c.events.len() as f64;
}
"canada" => {
let c: sel::Canada = D::de(s)?;
let g = &c.features[0].geometry;
acc += (c.type_.len() + g.type_.len() + g.coordinates.0) as f64;
}
"jeopardy" => {
let q: Vec<sel::Question> = D::de(s)?;
for x in &q {
acc += if x.round == "Final Jeopardy!" { 1.0 } else { 0.0 };
acc += x.category.len() as f64;
}
}
_ => {}
}
Some(acc)
}
// ---- edit: the same edits as bench_all.cpp, then write compact JSON
fn edit_serde(name: &str, r: &mut serde_json::Value) {
fn status(s: &mut serde_json::Value) {
let o = s.as_object_mut().unwrap();
let rc = o["retweet_count"].as_i64().unwrap();
o.insert("retweet_count".to_string(), (rc + 1).into());
o.remove("entities");
o.insert("seen".to_string(), true.into());
}
match name {
"twitter" => {
for s in r["statuses"].as_array_mut().unwrap() {
status(s);
}
}
"status" => status(r),
"citm_catalog" => {
for p in r["performances"].as_array_mut().unwrap() {
let o = p.as_object_mut().unwrap();
let start = o["start"].as_i64().unwrap();
o.insert("start".to_string(), (start + 1).into());
o.remove("seatMapImage");
o.insert("seen".to_string(), true.into());
}
}
"canada" => {
r["features"][0]["properties"]["name"] = "Kanada".into();
for f in r["features"].as_array_mut().unwrap() {
f["geometry"]["coordinates"][0].as_array_mut().unwrap().push(serde_json::json!([0.5, 0.25]));
}
}
"jeopardy" => {
for q in r.as_array_mut().unwrap() {
let o = q.as_object_mut().unwrap();
o.insert("value".to_string(), serde_json::Value::Null);
o.remove("air_date");
o.insert("seen".to_string(), true.into());
}
}
_ => {}
}
}
fn edit_sonic(name: &str, r: &mut sonic_rs::Value) {
fn status(s: &mut sonic_rs::Value) {
let o = s.as_object_mut().unwrap();
let rc = o.get(&"retweet_count").unwrap().as_i64().unwrap();
o.insert("retweet_count", rc + 1);
o.remove(&"entities");
o.insert("seen", true);
}
match name {
"twitter" => {
for s in r.get_mut("statuses").unwrap().as_array_mut().unwrap().iter_mut() {
status(s);
}
}
"status" => status(r),
"citm_catalog" => {
for p in r.get_mut("performances").unwrap().as_array_mut().unwrap().iter_mut() {
let o = p.as_object_mut().unwrap();
let start = o.get(&"start").unwrap().as_i64().unwrap();
o.insert("start", start + 1);
o.remove(&"seatMapImage");
o.insert("seen", true);
}
}
"canada" => {
let fs = r.get_mut("features").unwrap().as_array_mut().unwrap();
fs[0].get_mut("properties").unwrap().as_object_mut().unwrap().insert("name", "Kanada");
for f in fs.iter_mut() {
let ring = f.get_mut("geometry").unwrap().get_mut("coordinates").unwrap().get_mut(0).unwrap();
ring.as_array_mut().unwrap().push(sonic_rs::json!([0.5, 0.25]));
}
}
"jeopardy" => {
for q in r.as_array_mut().unwrap().iter_mut() {
let o = q.as_object_mut().unwrap();
o.insert("value", sonic_rs::Value::new_null());
o.remove(&"air_date");
o.insert("seen", true);
}
}
_ => {}
}
}
macro_rules! edit_simd {
($fname:ident, $t:ty) => {
fn $fname(name: &str, r: &mut $t) {
fn status(s: &mut $t) {
let o = s.as_object_mut().unwrap();
let rc = o.get("retweet_count").unwrap().as_i64().unwrap();
o.insert("retweet_count".into(), (rc + 1).into());
o.remove("entities");
o.insert("seen".into(), true.into());
}
match name {
"twitter" => {
for s in r.as_object_mut().unwrap().get_mut("statuses").unwrap().as_array_mut().unwrap().iter_mut() {
status(s);
}
}
"status" => status(r),
"citm_catalog" => {
for p in r.as_object_mut().unwrap().get_mut("performances").unwrap().as_array_mut().unwrap().iter_mut() {
let o = p.as_object_mut().unwrap();
let start = o.get("start").unwrap().as_i64().unwrap();
o.insert("start".into(), (start + 1).into());
o.remove("seatMapImage");
o.insert("seen".into(), true.into());
}
}
"canada" => {
let fs = r.as_object_mut().unwrap().get_mut("features").unwrap().as_array_mut().unwrap();
fs[0].as_object_mut().unwrap().get_mut("properties").unwrap().as_object_mut().unwrap().insert("name".into(), "Kanada".into());
for f in fs.iter_mut() {
let g = f.as_object_mut().unwrap().get_mut("geometry").unwrap().as_object_mut().unwrap();
let ring = &mut g.get_mut("coordinates").unwrap().as_array_mut().unwrap()[0];
ring.as_array_mut().unwrap().push(vec![<$t>::from(0.5), <$t>::from(0.25)].into());
}
}
"jeopardy" => {
for q in r.as_array_mut().unwrap().iter_mut() {
let o = q.as_object_mut().unwrap();
o.insert("value".into(), <$t>::Static(simd_json::StaticNode::Null));
o.remove("air_date");
o.insert("seen".into(), true.into());
}
}
_ => {}
}
}
};
}
edit_simd!(edit_simd_owned, simd_json::OwnedValue);
edit_simd!(edit_simd_borrowed, simd_json::BorrowedValue<'_>);
// ---- driver
struct Res {
st: Stats,
acc: f64,
want: bool,
out: Vec<u8>,
}
impl Res {
fn new(want: bool) -> Res {
Res { st: Stats::default(), acc: 0.0, want, out: Vec::new() }
}
}
fn emit(r: &mut Res, o: Vec<u8>) -> bool {
r.acc = o.len() as f64;
if r.want {
r.out = o;
}
true
}
struct Variant<'a> {
name: &'static str,
f: Box<dyn Fn(&[u8], &mut Res) -> bool + 'a>,
any_order: bool, // sum: visits objects in another order than the document's
}
fn v<'a>(name: &'static str, f: impl Fn(&[u8], &mut Res) -> bool + 'a) -> Variant<'a> {
Variant { name, f: Box::new(f), any_order: false }
}
fn v_any<'a>(name: &'static str, f: impl Fn(&[u8], &mut Res) -> bool + 'a) -> Variant<'a> {
Variant { name, f: Box::new(f), any_order: true }
}
fn run(var: &Variant, s: &[u8], r: &mut Res) -> bool {
catch_unwind(AssertUnwindSafe(|| (var.f)(s, r))).unwrap_or(false)
}
static mut SINK: f64 = 0.0;
fn sink(x: f64) {
unsafe { std::ptr::write_volatile(std::ptr::addr_of_mut!(SINK), x) }
}
// the input contract of bench_all.cpp: at least 64 bytes of spare capacity
fn padded(s: &[u8]) -> Vec<u8> {
let mut r = Vec::with_capacity(s.len() + 64);
r.extend_from_slice(s);
r
}
// the minified inputs (twitter_min, citm_catalog_min): the whitespace outside strings removed, the bytes inside strings
// untouched (the same function as strip_ws in bench_all.cpp)
fn strip_ws(s: &[u8]) -> Vec<u8> {
let mut r = Vec::with_capacity(s.len());
let mut in_string = false;
let mut i = 0;
while i < s.len() {
let ch = s[i];
if in_string {
r.push(ch);
if ch == b'\\' && i + 1 < s.len() {
i += 1;
r.push(s[i]);
} else if ch == b'"' {
in_string = false;
}
} else if ch != b' ' && ch != b'\n' && ch != b'\r' && ch != b'\t' {
r.push(ch);
in_string = ch == b'"';
}
i += 1;
}
r
}
// malformed inputs derived from a valid document, as in bench_all.cpp (0xFF in a string value, not a key)
// (what, text, is the 0xFF probe)
fn malformed(s: &[u8]) -> Vec<(&'static str, Vec<u8>, bool)> {
let (mut first_close, mut mid_quote, mut last_quote) = (None, None, None);
let mut in_string = false;
let mut stack: Vec<u8> = Vec::new();
let mut prev = 0u8;
let mut i = 0;
while i < s.len() {
let ch = s[i];
if in_string {
if ch == b'\\' {
i += 1;
} else if ch == b'"' {
in_string = false;
}
} else if ch == b'"' {
in_string = true;
let value = prev == b':' || (stack.last() == Some(&b'[') && (prev == b'[' || prev == b','));
if value {
last_quote = Some(i);
if mid_quote.is_none() && i >= s.len() / 2 {
mid_quote = Some(i);
}
}
prev = b'"';
} else if ch == b'{' || ch == b'[' {
stack.push(ch);
prev = ch;
} else if ch == b'}' || ch == b']' {
if ch == b'}' && first_close.is_none() {
first_close = Some(i);
}
stack.pop();
prev = ch;
} else if ch == b':' || ch == b',' {
prev = ch;
}
i += 1;
}
let mut t = s.to_vec();
while matches!(t.last(), Some(b' ' | b'\n' | b'\r' | b'\t')) {
t.pop();
}
let mut trailing = t.clone();
trailing.extend_from_slice(b" ]x"); // after the value
t.pop();
let mut out = vec![("truncated input", padded(&t), false), ("trailing garbage", padded(&trailing), false)];
let mut t = s.to_vec();
if let Some(c) = first_close {
t.insert(c, b',');
out.push(("a stray comma before '}'", padded(&t), false));
} else {
// a file without objects (--files): the comma goes before the last ']'
let c = (0..t.len()).rev().find(|&i| t[i] == b']').unwrap();
t.insert(c, b',');
out.push(("a stray comma before ']'", padded(&t), false));
}
// a file without string values (--files) gets no UTF-8 probe
if let Some(q) = mid_quote.or(last_quote) {
let mut t = s.to_vec();
t.insert(q + 1, 0xFF);
out.push(("invalid UTF-8 (0xFF in a string)", padded(&t), true));
}
out
}
fn same_text(out: &[u8], expected: &serde_json::Value) -> bool {
serde_json::from_slice::<serde_json::Value>(out).map(|v| v == *expected).unwrap_or(false)
}
fn main() {
let args: Vec<String> = std::env::args().collect();
// --files <dir>: every *.json file of the directory instead of the files below, without select and edit;
// --conformance <dir>: every validate variant on every *.json file of the directory (JSONTestSuite), no timing
let files = args.len() > 1 && args[1] == "--files";
let conformance = args.len() > 1 && args[1] == "--conformance";
let a = if files || conformance { 2 } else { 1 };
if args.len() <= a {
eprintln!("usage: {0} <json_test_data dir> [rounds] [document] [use case]\n {0} --files <dir> [rounds] [document] [use case]\n {0} --conformance <dir>", args[0]);
std::process::exit(1);
}
let t = format!("{}/", args[a]);
let rounds: usize = args.get(a + 1).map(|r| r.parse().unwrap()).unwrap_or(30).max(1);
let only: String = args.get(a + 2).cloned().unwrap_or_default();
let only_uc: String = if conformance { "validate".to_string() } else { args.get(a + 3).cloned().unwrap_or_default() };
// (file, text, batch, the document whose select and edit apply)
let mut docs: Vec<(String, Vec<u8>, usize, String)> = Vec::new();
if files || conformance {
let mut paths: Vec<std::path::PathBuf> = std::fs::read_dir(&t).unwrap().map(|e| e.unwrap().path()).filter(|p| p.extension().map_or(false, |x| x == "json")).collect();
paths.sort();
for p in paths {
// small files are timed in batches of about 500 KB of input, as status is
let text = padded(&std::fs::read(&p).unwrap());
let name = if conformance { p.file_name() } else { p.file_stem() }.unwrap().to_string_lossy().to_string();
let batch = (500000 / text.len().max(1)).max(1);
docs.push((name.clone(), text, batch, name));
}
} else {
for f in ["nativejson-benchmark/twitter.json", "nativejson-benchmark/citm_catalog.json", "nativejson-benchmark/canada.json", "jeopardy/jeopardy.json"] {
let name = f.split('/').nth(1).unwrap().trim_end_matches(".json").to_string();
docs.push((name.clone(), padded(&std::fs::read(format!("{}{}", t, f)).unwrap()), 1, name));
}
let tw: serde_json::Value = serde_json::from_slice(&docs[0].1).unwrap();
docs.push(("status".to_string(), padded(serde_json::to_string(&tw["statuses"][0]).unwrap().as_bytes()), 200, "status".to_string()));
let (tw_min, citm_min) = (padded(&strip_ws(&docs[0].1)), padded(&strip_ws(&docs[1].1)));
docs.push(("twitter_min".to_string(), tw_min, 1, "twitter".to_string()));
docs.push(("citm_catalog_min".to_string(), citm_min, 1, "citm_catalog".to_string()));
}
std::panic::set_hook(Box::new(|_| {})); // a panic is a failed call, reported by the checks
let simd_reused = RefCell::new((simd_json::Buffers::default(), Vec::<u8>::new()));
let mut excluded_total = 0;
for (file, s, batch, base) in &docs {
if !only.is_empty() && *file != only {
continue;
}
let (file, name) = (file.as_str(), base.as_str());
let s = s.as_slice();
let bad = if conformance { Vec::new() } else { malformed(s) };
for uc in ["validate", "sum", "select", "edit", "minify", "write"] {
if (!only_uc.is_empty() && uc != only_uc) || (files && (uc == "select" || uc == "edit")) {
continue;
}
// write: each library's document, parsed once outside the timer
let mut wbuf: Vec<u8>;
let (w_serde, w_sonic, w_simd) = if uc == "write" {
wbuf = s.to_vec();
(
Some(serde_json::from_slice::<serde_json::Value>(s).unwrap()),
Some(sonic_rs::from_slice::<sonic_rs::Value>(s).unwrap()),
Some(simd_json::to_borrowed_value(&mut wbuf).unwrap()),
)
} else {
(None, None, None)
};
let reuse = &simd_reused;
let all: Vec<Variant> = match uc {
"validate" => vec![
v("serde_json: IgnoredAny", |s, _| serde_json::from_slice::<IgnoredAny>(s).is_ok()),
v("serde_json: from_utf8 + IgnoredAny", |s, _| std::str::from_utf8(s).ok().map_or(false, |t| serde_json::from_str::<IgnoredAny>(t).is_ok())),
v("serde_json: Value", |s, _| serde_json::from_slice::<serde_json::Value>(s).is_ok()),
v("sonic-rs: IgnoredAny", |s, _| sonic_rs::from_slice::<IgnoredAny>(s).is_ok()),
v("sonic-rs: Value", |s, _| sonic_rs::from_slice::<sonic_rs::Value>(s).is_ok()),
v("simd-json: tape (copy)", |s, _| { let mut b = s.to_vec(); simd_json::to_tape(&mut b).is_ok() }),
v("simd-json: borrowed (copy)", |s, _| { let mut b = s.to_vec(); let ok = simd_json::to_borrowed_value(&mut b).is_ok(); ok }),
v("simd-json: tape (reused)", move |s, _| {
let mut g = reuse.borrow_mut();
let (ref mut bufs, ref mut b) = *g;
b.clear();
b.extend_from_slice(s);
simd_json::to_tape_with_buffers(b, bufs).is_ok()
}),
],
"sum" => vec![
v("serde_json: visitor", |s, r| sum_serde(s, &mut r.st)),
v_any("serde_json: Value", |s, r| serde_json::from_slice::<serde_json::Value>(s).map(|x| walk_serde(&x, &mut r.st)).is_ok()),
v("sonic-rs: visitor", |s, r| sum_sonic(s, &mut r.st)),
v("sonic-rs: Value", |s, r| sonic_rs::from_slice::<sonic_rs::Value>(s).map(|x| walk_sonic(&x, &mut r.st)).is_ok()),
v("simd-json: visitor (copy)", |s, r| sum_simd(s, &mut r.st)),
v_any("simd-json: borrowed (copy)", |s, r| { let mut b = s.to_vec(); simd_json::to_borrowed_value(&mut b).map(|x| walk_simd(&x, &mut r.st)).is_ok() }),
v_any("simd-json: borrowed (reused)", move |s, r| {
let mut g = reuse.borrow_mut();
let (ref mut bufs, ref mut b) = *g;
b.clear();
b.extend_from_slice(s);
simd_json::to_borrowed_value_with_buffers(b, bufs).map(|x| walk_simd(&x, &mut r.st)).is_ok()
}),
],
"select" => vec![
v("serde_json: structs", move |s, r| pick_structs::<SerdeJson>(name, s).map(|a| r.acc = a).is_some()),
v("serde_json: from_utf8 + structs", move |s, r| pick_structs::<SerdeJsonStr>(name, s).map(|a| r.acc = a).is_some()),
v("serde_json: Value", move |s, r| serde_json::from_slice::<serde_json::Value>(s).map(|x| r.acc = pick_serde(name, &x)).is_ok()),
v("sonic-rs: structs", move |s, r| pick_structs::<SonicRs>(name, s).map(|a| r.acc = a).is_some()),
v("sonic-rs: Value", move |s, r| sonic_rs::from_slice::<sonic_rs::Value>(s).map(|x| r.acc = pick_sonic(name, &x)).is_ok()),
v("simd-json: structs (copy)", move |s, r| pick_structs::<SimdJson>(name, s).map(|a| r.acc = a).is_some()),
v("simd-json: borrowed (copy)", move |s, r| { let mut b = s.to_vec(); let ok = simd_json::to_borrowed_value(&mut b).map(|x| r.acc = pick_simd(name, &x)).is_ok(); ok }),
],
"edit" => vec![
v("serde_json: Value", move |s, r| match serde_json::from_slice::<serde_json::Value>(s) {
Ok(mut x) => { edit_serde(name, &mut x); emit(r, serde_json::to_vec(&x).unwrap()) }
Err(_) => false,
}),
v("sonic-rs: Value", move |s, r| match sonic_rs::from_slice::<sonic_rs::Value>(s) {
Ok(mut x) => { edit_sonic(name, &mut x); emit(r, sonic_rs::to_vec(&x).unwrap()) }
Err(_) => false,
}),
v("simd-json: owned (copy)", move |s, r| { let mut b = s.to_vec(); match simd_json::to_owned_value(&mut b) {
Ok(mut x) => { edit_simd_owned(name, &mut x); emit(r, simd_json::to_vec(&x).unwrap()) }
Err(_) => false,
}}),
v("simd-json: borrowed (copy)", move |s, r| { let mut b = s.to_vec(); let ok = match simd_json::to_borrowed_value(&mut b) {
Ok(mut x) => { edit_simd_borrowed(name, &mut x); emit(r, simd_json::to_vec(&x).unwrap()) }
Err(_) => false,
}; ok }),
],
"minify" => vec![
v("serde_json: Value", |s, r| serde_json::from_slice::<serde_json::Value>(s).map(|x| emit(r, serde_json::to_vec(&x).unwrap())).unwrap_or(false)),
v("sonic-rs: Value", |s, r| sonic_rs::from_slice::<sonic_rs::Value>(s).map(|x| emit(r, sonic_rs::to_vec(&x).unwrap())).unwrap_or(false)),
v("simd-json: borrowed (copy)", |s, r| { let mut b = s.to_vec(); simd_json::to_borrowed_value(&mut b).map(|x| emit(r, simd_json::to_vec(&x).unwrap())).unwrap_or(false) }),
],
_ => {
let (a, b, c) = (w_serde.as_ref().unwrap(), w_sonic.as_ref().unwrap(), w_simd.as_ref().unwrap());
vec![
v("serde_json: Value", move |_, r| emit(r, serde_json::to_vec(a).unwrap())),
v("sonic-rs: Value", move |_, r| emit(r, sonic_rs::to_vec(b).unwrap())),
v("simd-json: borrowed", move |_, r| emit(r, simd_json::to_vec(c).unwrap())),
]
}
};
// the reference result: serde_json's visitor (sum, document order), Value (select, edit, minify, write)
let mut ref_st = Stats::default();
let mut ref_acc = 0.0;
let mut ref_json = serde_json::Value::Null;
match uc {
"sum" => {
sum_serde(s, &mut ref_st);
println!("check {:<13} {:<9} reference: nodes {} str {} num {:.16e}", file, uc, ref_st.nodes, ref_st.str_, ref_st.num);
}
"select" => {
ref_acc = pick_serde(name, &serde_json::from_slice(s).unwrap());
println!("check {:<13} {:<9} reference: {:.16e}", file, uc, ref_acc);
}
"validate" => {}
_ => {
ref_json = serde_json::from_slice(s).unwrap();
if uc == "edit" {
edit_serde(name, &mut ref_json);
}
}
}
if conformance {
// CONF_VARIANT=<name>: only this variant (a stack overflow aborts the process, see conformance.sh)
let only_var = std::env::var("CONF_VARIANT").unwrap_or_default();
for var in all.iter().filter(|v| only_var.is_empty() || v.name == only_var) {
let mut r = Res::new(true);
let verdict = match catch_unwind(AssertUnwindSafe(|| (var.f)(s, &mut r))) {
Ok(true) => "accepted",
Ok(false) => "rejected",
Err(_) => "crashed",
};
println!("conformance: {} | {} | {}", file, var.name, verdict);
}
continue;
}
let n_all = all.len();
let mut vs: Vec<Variant> = Vec::new();
let mut levels: Vec<&str> = Vec::new();
for var in all {
let mut r = Res::new(true);
let mut why = String::new();
let mut panicked = false;
if !catch_unwind(AssertUnwindSafe(|| (var.f)(s, &mut r))).unwrap_or_else(|_| {
panicked = true;
false
}) {
why = if panicked { "crashes on the valid input" } else { "rejects the valid input" }.to_string();
} else if uc == "sum"
&& !(r.st.nodes == ref_st.nodes
&& r.st.str_ == ref_st.str_
&& if var.any_order { (r.st.num - ref_st.num).abs() <= 1e-9 * ref_st.num.abs() } else { r.st.num == ref_st.num })
{
why = format!("wrong result (nodes {} str {} num {:.16e})", r.st.nodes, r.st.str_, r.st.num);
} else if uc == "select" && r.acc != ref_acc {
why = format!("wrong result ({:.16e})", r.acc);
} else if (uc == "edit" || uc == "minify" || uc == "write") && !same_text(&r.out, &ref_json) {
why = "the output does not read back as the expected document".to_string();
}
if why.is_empty() {
// the validation level from the malformed-input probes, as in bench_all.cpp
let mut level = "n/a";
if uc != "write" {
let (mut structural, mut utf8) = (false, false);
let mut notes: Vec<String> = Vec::new();
for (what, b, is_utf8) in &bad {
let mut rb = Res::new(true);
match catch_unwind(AssertUnwindSafe(|| (var.f)(b, &mut rb))) {
Ok(false) => continue,
Ok(true) => {
notes.push(format!("accepts {}", what));
if *is_utf8 { utf8 = true } else { structural = true }
}
Err(_) => {
notes.push(format!("crashes on {}", what));
structural = true;
}
}
}
level = if structural { "partial" } else if utf8 { "no UTF-8" } else { "full" };
if !notes.is_empty() {
println!("level: {} {} | {} | {} | {}", file, uc, var.name, level, notes.join("; "));
}
}
vs.push(var);
levels.push(level);
} else {
excluded_total += 1;
println!("excluded: {} {} | {} | {}", file, uc, var.name, why);
}
}
println!("check {:<13} {:<9} {} of {} variants give the right result", file, uc, vs.len(), n_all);
if vs.is_empty() {
continue;
}
let r = if s.len() > 10_000_000 { rounds.min((rounds / 5).max(3)) } else { rounds };
let mut best = vec![f64::MAX; vs.len()];
// a new order of the variants in every round (as in bench_all.cpp): a Fisher-Yates shuffle with xorshift64
let mut order: Vec<usize> = (0..vs.len()).collect();
let mut rng: u64 = 12345;
for i in 0..r {
if i > 0 {
for j in (1..order.len()).rev() {
rng ^= rng << 13;
rng ^= rng >> 7;
rng ^= rng << 17;
order.swap(j, (rng % (j as u64 + 1)) as usize);
}
}
for &k in &order {
let var = &vs[k];
let mut res = Res::new(false);
run(var, s, &mut res); // untimed: the previous variant's leftovers are cleaned up here
sink(res.st.num + res.acc);
let t0 = Instant::now();
for _ in 0..*batch {
let mut rt = Res::new(false);
let ok = run(var, s, &mut rt);
sink(if ok { rt.st.num + rt.acc } else { -1.0 });
}
let ns = t0.elapsed().as_nanos() as f64 / *batch as f64;
best[k] = best[k].min(ns);
}
}
print!("{:<13} {:<9}", file, uc);
for (k, var) in vs.iter().enumerate() {
print!(" | {} [{}] {:.1}us ({:.2}x)", var.name, levels[k], best[k] / 1e3, best[k] / best[0]);
}
println!();
}
}
println!("done: {} variant(s) excluded", excluded_total);
}
tests/benchmarks/json_view/others/summarize.py
Executable
+229
View File
@@ -0,0 +1,229 @@
#!/usr/bin/env python3
# __ _____ _____ _____
# __| | __| | | | JSON for Modern C++ (supporting code)
# | | |__ | | | | | | version 3.12.0
# |_____|_____|_____|_|___| https://github.com/nlohmann/json
#
# SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
# SPDX-License-Identifier: MIT
"""Summarize runs of bench_all and bench_rs by use case.
Usage: summarize.py LOG... [--rust LOG...] [--json OUT.json]
Every variant carries a validation level from the malformed-input probes: "full" (rejects truncated input, a stray
comma and invalid UTF-8), "no UTF-8" (accepts only the invalid UTF-8), "partial" (accepts or crashes on a structural
error, or crashes on any probe), or "n/a" (write: no input to validate; counts as full). A variant's level is the
worst it got for any file. Prints, for every use case and file,
(a) per library the best "full" variant and, if faster, the best variant at any level, with their ratios to the
best "full" nlohmann json_document variant (variants named "(reused)" or "(reused allocator)" keep a parser,
document or allocator across calls and are never chosen as a library's best; neither are "(copy untimed)"
variants, which copy their input before the timer starts), and in a "reused:" line the library's best reused
variant in the same way,
(b) all variants with their levels and times,
(c) the variants below "full" with what the probes found, and the variants excluded for wrong results.
--json writes {use case: {file: {library: {"best": {"variant", "us", "level"} or null, "best_any": {...},
"best_reused": {...} or null, "best_reused_any": {...} or null, "variants": {variant: {"us", "level"}}, "excluded":
{variant: reason}}}}} for the chart scripts ("best_reused" is the best full reused variant, "best_reused_any" the best
reused variant at any level); variant names there omit the "<library>: " prefix.
Several logs are combined by taking each cell's best time. A variant excluded for one file (or in one log) is excluded
for every file of that use case. The reference values that bench_all and bench_rs print for sum and select are
compared, so both programs are known to have checked against the same numbers.
"""
import json
import re
import sys
USE_CASES = ["validate", "sum", "select", "edit", "minify", "write"]
DOCS = ["twitter", "citm_catalog", "canada", "jeopardy", "status", "twitter_min", "citm_catalog_min"]
OURS = "nlohmann json_document"
RANK = {"full": 0, "n/a": 0, "no UTF-8": 1, "partial": 2}
CELL = re.compile(r"^(.+) \[(full|no UTF-8|partial|n/a)\] ([\d.]+)us(?: \(([\d.]+)x\))?$")
REF = re.compile(r"^check (\S+)\s+(\S+)\s+reference: (.*)$")
def library(name):
return name.split(": ", 1)[0]
def variant(name):
return name.split(": ", 1)[1] if ": " in name else name
def is_reused(name):
return re.search(r"\(reused[ )]", name) is not None
def is_untimed_copy(name):
return "(copy untimed)" in name
def worse(a, b):
return a if a is not None and (b is None or RANK[a] >= RANK[b]) else b
def parse(path, cells, levels, notes, excluded, refs):
for line in open(path, encoding="utf-8"):
line = line.rstrip("\n")
if line.startswith(("excluded: ", "level: ")):
kind, rest = line.split(": ", 1)
fields = rest.split(" | ")
doc, uc = fields[0].split()
name = fields[1]
target = excluded if kind == "excluded" else notes
for why in fields[-1].split("; "):
target.setdefault((uc, name), {}).setdefault(why, set()).add(doc)
if kind == "level":
levels[(uc, name)] = worse(levels.get((uc, name)), fields[2])
continue
m = REF.match(line)
if m:
refs.setdefault((m[1], m[2]), {})[path] = m[3]
continue
if line.startswith(("check", "done", "WARNING")) or " | " not in line:
continue
parts = line.split(" | ")
head = parts[0].split()
if len(head) != 2 or head[1] not in USE_CASES:
continue
for c in parts[1:]:
m = CELL.match(c.strip())
if m:
key = (head[0], head[1], m[1])
if head[0] not in DOCS: # bench_all --files: the documents are the files of a directory
DOCS.append(head[0])
cells[key] = min(cells.get(key, float("inf")), float(m[3]))
levels[(head[1], m[1])] = worse(levels.get((head[1], m[1])), m[2])
def check_refs(refs):
"""The sum and select references of all logs must agree (bench_rs prints Rust's float formatting)."""
def numbers(text):
return [float(x) for x in re.findall(r"[-+]?\d[\d.]*(?:e[-+]?\d+)?", text)]
ok = True
for (doc, uc), by_log in sorted(refs.items()):
values = {tuple(numbers(t)) for t in by_log.values()}
if len(values) > 1:
ok = False
print("WARNING: the %s %s references differ: %s" % (doc, uc, "; ".join("%s: %s" % kv for kv in by_log.items())))
return ok
def is_full(level):
return RANK[level] == 0
def main():
args = sys.argv[1:]
out_json = None
if "--json" in args:
i = args.index("--json")
out_json = args[i + 1]
del args[i:i + 2]
cpp = args[:args.index("--rust")] if "--rust" in args else args
rust = args[args.index("--rust") + 1:] if "--rust" in args else []
if not cpp and not rust:
sys.exit(__doc__)
cells, levels, notes, excluded, refs = {}, {}, {}, {}, {}
for p in cpp + rust:
parse(p, cells, levels, notes, excluded, refs)
check_refs(refs)
result = {}
def docs_of(uc):
return [d for d in DOCS if any(k[0] == d and k[1] == uc for k in cells)]
def cell_of(doc, uc):
return {n: t for (d, u, n), t in cells.items() if d == doc and u == uc and (uc, n) not in excluded}
def show(n, t, ours, uc):
ratio = "%5.2f" % (t / ours) if ours else " -"
return "%-40s %-10s %11.1f us %s" % (variant(n), "[%s]" % levels[(uc, n)], t, ratio)
print("# (a) Per library: the best full variant, and the best at any level if faster (ratio to the best full %s"
" variant; below 1: faster)" % OURS)
for uc in USE_CASES:
if not docs_of(uc):
continue
print("\n== " + uc)
for doc in docs_of(uc):
cell = cell_of(doc, uc)
libs = {}
for n, t in cell.items():
libs.setdefault(library(n), {})[n] = t
entry = result.setdefault(uc, {}).setdefault(doc, {})
rows = []
def pick(vs):
"""the best full variant and the best variant at any level"""
full = {n: t for n, t in vs.items() if is_full(levels[(uc, n)])}
return (min(full.items(), key=lambda x: x[1]) if full else None,
min(vs.items(), key=lambda x: x[1]) if vs else None)
def described(x):
return {"variant": variant(x[0]), "us": x[1], "level": levels[(uc, x[0])]} if x else None
for lib, vs in libs.items():
b, a = pick({n: t for n, t in vs.items() if not is_reused(n) and not is_untimed_copy(n)})
rb, ra = pick({n: t for n, t in vs.items() if is_reused(n)})
entry[lib] = {
"best": described(b),
"best_any": described(a),
"best_reused": described(rb),
"best_reused_any": described(ra),
"variants": {variant(n): {"us": t, "level": levels[(uc, n)]} for n, t in sorted(vs.items(), key=lambda x: x[1])},
}
rows.append((lib, b, a, rb, ra))
for (u, n), whys in excluded.items():
if u == uc:
lib = entry.setdefault(library(n), {"best": None, "best_any": None, "best_reused": None, "best_reused_any": None, "variants": {}})
lib.setdefault("excluded", {})[variant(n)] = "; ".join(sorted(whys))
ours = next((b[1] for lib, b, a, rb, ra in rows if lib == OURS and b), None)
print("%s%s" % (doc, "" if ours else " (no full %s result)" % OURS))
rows.sort(key=lambda r: (r[1] is None, r[1][1] if r[1] else r[2][1] if r[2] else 0))
for lib, b, a, rb, ra in rows:
line = " %-24s %s" % (lib, show(*b, ours, uc) if b else "%-40s %-10s %14s %5s" % ("(none)", "", "", ""))
if a and (not b or a[0] != b[0]):
line += " | faster: %s" % show(*a, ours, uc)
print(line)
if ra:
line = " %-22s %s" % ("reused:", show(*rb, ours, uc) if rb else "%-40s %-10s %14s %5s" % ("(none)", "", "", ""))
if not rb or ra[0] != rb[0]:
line += " | faster: %s" % show(*ra, ours, uc)
print(line)
print("\n# (b) All variants")
for uc in USE_CASES:
if not docs_of(uc):
continue
print("\n== " + uc)
for doc in docs_of(uc):
cell = cell_of(doc, uc)
ours = min((t for n, t in cell.items() if library(n) == OURS and not is_reused(n) and is_full(levels[(uc, n)])), default=None)
print(doc)
for n, t in sorted(cell.items(), key=lambda x: x[1]):
ratio = "%5.2f" % (t / ours) if ours else " -"
print(" %-66s %-10s %11.1f us %s" % (n, "[%s]" % levels[(uc, n)], t, ratio))
print("\n# (c) Variants below full, and excluded variants")
for uc in USE_CASES:
rows = sorted((n, whys) for (u, n), whys in notes.items() if u == uc)
ex = sorted((n, whys) for (u, n), whys in excluded.items() if u == uc)
if not rows and not ex:
continue
print("\n== " + uc)
for n, whys in rows:
for why, docs in sorted(whys.items()):
print(" %-58s %-10s %s (%s)" % (n, "[%s]" % levels.get((uc, n), "?"), why, ", ".join(d for d in DOCS if d in docs)))
for n, whys in ex:
for why, docs in sorted(whys.items()):
print(" %-58s %-10s %s (%s)" % (n, "excluded", why, ", ".join(d for d in DOCS if d in docs)))
if out_json:
with open(out_json, "w", encoding="utf-8") as f:
json.dump(result, f, indent=2)
f.write("\n")
if __name__ == "__main__":
main()
tests/src/unit-32bit.cpp
+20
View File
@@ -97,3 +97,23 @@ TEST_CASE("CBOR")
}
}
}
TEST_CASE("MessagePack")
{
SECTION("parse errors")
{
SECTION("array/map size equal to the unknown-size sentinel")
{
// on 32-bit platforms an array 32/map 32 length of 0xFFFFFFFF aliases unknown_size()
std::vector<uint8_t> const varr = {0xDD, 0xFF, 0xFF, 0xFF, 0xFF};
std::vector<uint8_t> const vmap = {0xDF, 0xFF, 0xFF, 0xFF, 0xFF};
json _;
CHECK_THROWS_WITH_AS(_ = json::from_msgpack(varr), "[json.exception.out_of_range.408] syntax error while parsing MessagePack size: excessive array size", json::out_of_range&);
CHECK(json::from_msgpack(varr, true, false).is_discarded());
CHECK_THROWS_WITH_AS(_ = json::from_msgpack(vmap), "[json.exception.out_of_range.408] syntax error while parsing MessagePack size: excessive map size", json::out_of_range&);
CHECK(json::from_msgpack(vmap, true, false).is_discarded());
}
}
}
tests/src/unit-allocator.cpp
+22 -3
View File
@@ -1038,6 +1038,14 @@ template<class T>
struct sweep_allocator
{
using value_type = T;
// GCC 4.8's std::map takes these from the allocator instead of from
// std::allocator_traits
using pointer = T*;
using const_pointer = const T*;
using reference = T&;
using const_reference = const T&;
using size_type = std::size_t;
using difference_type = std::ptrdiff_t;
sweep_allocator() = default;
template<class U> sweep_allocator(const sweep_allocator<U>& /*unused*/) noexcept {}
@@ -1071,6 +1079,11 @@ struct sweep_allocator
::new (static_cast<void*>(p)) U(std::forward<Args>(args)...);
}
// libc++ probes whether construct() is usable for const objects (when
// checking for trivial copies); this must not be viable then
template<class U, class... Args>
void construct(const U* /*unused*/, const Args& ... /*unused*/) = delete;
template<class U>
void destroy(U* p) noexcept
{
@@ -1155,9 +1168,14 @@ TEST_CASE("parse() survives a failing allocation at every point (#5985)")
// With iterator debugging (MSVC STL debug builds, also used by clang-cl),
// containers allocate a debug proxy through the allocator inside their
// noexcept move constructors, so failing that allocation terminates the
// program instead of throwing std::bad_alloc. Nothing to check there.
// noexcept default and move constructors, so failing that allocation
// terminates the program instead of throwing std::bad_alloc. Nothing to
// check there.
#if !(defined(_ITERATOR_DEBUG_LEVEL) && _ITERATOR_DEBUG_LEVEL > 0)
// Clang 3.4 and 3.5 leak memory when an element constructor throws
// inside libstdc++'s containers (a std::map copy, a std::vector
// reallocation), without any json value involved.
#if !(defined(__clang__) && !defined(__apple_build_version__) && __clang_major__ == 3 && __clang_minor__ < 6)
SECTION("parser callback")
{
const auto keep_all = [](int /*depth*/, sweep_json::parse_event_t /*event*/, sweep_json& /*parsed*/) noexcept
@@ -1178,7 +1196,6 @@ TEST_CASE("parse() survives a failing allocation at every point (#5985)")
return sweep_json::parse(text, drop_d);
});
}
#endif
SECTION("sax_parse into an existing value")
{
@@ -1192,5 +1209,7 @@ TEST_CASE("parse() survives a failing allocation at every point (#5985)")
return value;
});
}
#endif
#endif
}
#endif
tests/src/unit-binary_writer_sinks.cpp
+9 -1
View File
@@ -50,6 +50,14 @@ std::vector<json> test_values()
large_payloads.push_back(json::binary(std::vector<std::uint8_t>(static_cast<std::size_t>(100 * i), static_cast<std::uint8_t>(i))));
}
// several times vector_sink_window characters in every format: the vector
// sink makes the capacity it grows to writable a window at a time
json many_windows = json::array();
for (std::uint64_t i = 0; i < 30000; ++i)
{
many_windows.push_back((i * 0x9E3779B97F4A7C15u) >> 1u);
}
return
{
json(nullptr), json(true), json(false),
@@ -61,7 +69,7 @@ std::vector<json> test_values()
json::array(), json::object(),
json::array({1, 2, 3}), json({{"a", 1}, {"b", nullptr}}),
json({{"nested", {{"deep", json::array({1, "two", 3.0, nullptr})}}}}),
big_array, big_object, large_payloads,
big_array, big_object, large_payloads, many_windows,
json::binary(std::vector<std::uint8_t>(5000, 0x42))
};
}
tests/src/unit-bjdata.cpp
+33 -11
View File
@@ -78,23 +78,25 @@ TEST_CASE("BJData")
{
SECTION("binary_reader BJData lookup tables")
{
// both lookups are static member functions
// bjd_type_name() is static; is_valid_optimized_type() needs a BJData reader
std::vector<std::uint8_t> const data;
using reader_t = nlohmann::detail::binary_reader<json, decltype(nlohmann::detail::input_adapter(data))>;
// the excluded optimized-type markers must match binary_writer's
// is_bjdata_excluded_type_marker(), which encodes the same 8 markers
// the markers BJData excludes as optimized types must match
// binary_writer's is_bjdata_excluded_type_marker(), which encodes the
// same 8 markers
const reader_t reader(nlohmann::detail::input_adapter(data), json::input_format_t::bjdata);
for (const char marker :
{'[', '{', 'S', 'H', 'T', 'F', 'N', 'Z'
{'[', '{', 'S', 'H', 'T', 'F', 'N', 'Z', 'x'
})
{
CHECK(reader_t::is_bjd_excluded_optimized_type(static_cast<unsigned char>(marker)));
CHECK(!reader.is_valid_optimized_type(static_cast<unsigned char>(marker)));
}
for (const char marker :
{'U', 'i', 'u', 'I', 'm', 'l', 'M', 'L', 'd', 'D', 'C', 'B', 'x'
{'U', 'i', 'u', 'I', 'm', 'l', 'M', 'L', 'd', 'D', 'C', 'B', 'h'
})
{
CHECK(!reader_t::is_bjd_excluded_optimized_type(static_cast<unsigned char>(marker)));
CHECK(reader.is_valid_optimized_type(static_cast<unsigned char>(marker)));
}
// every dtype marker must round-trip to its ND-array type name
@@ -3237,14 +3239,34 @@ TEST_CASE("BJData")
#endif
CHECK(json::from_bjdata(vM, true, false).is_discarded());
#if SIZE_MAX != 0xffffffff
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vMX), "[json.exception.out_of_range.408] syntax error while parsing BJData size: excessive ndarray size caused overflow", json::out_of_range&);
#else
// the first dimension is 2^64-1, which is rejected as a count (see below)
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vMX), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
#endif
CHECK(json::from_bjdata(vMX, true, false).is_discarded());
}
SECTION("optimized array: count equal to SIZE_MAX")
{
// the reader marks a container without a count by SIZE_MAX, so
// a count of that value must not be read as "no count"
// (it used to parse as [1])
json _;
#if SIZE_MAX != 0xffffffff
std::vector<uint8_t> const vM = {'[', '#', 'M', 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 'i', 0x01, ']'};
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
CHECK(json::from_bjdata(vM, true, false).is_discarded());
// one less is an ordinary excessive count
std::vector<uint8_t> const vM1 = {'[', '#', 'M', 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 'i', 0x01, ']'};
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM1), "[json.exception.out_of_range.408] excessive array size: 18446744073709551614", json::out_of_range&);
#else
std::vector<uint8_t> const vm = {'[', '#', 'm', 0xFF, 0xFF, 0xFF, 0xFF, 'i', 0x01, ']'};
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vm), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
CHECK(json::from_bjdata(vm, true, false).is_discarded());
std::vector<uint8_t> const vL = {'[', '#', 'L', 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 'i', 0x01, ']'};
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vL), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
CHECK(json::from_bjdata(vL, true, false).is_discarded());
#endif
}
SECTION("optimized array: integer value overflow")
{
#if SIZE_MAX == 0xffffffff
tests/src/unit-class_lexer.cpp
+4 -3
View File
@@ -2222,9 +2222,10 @@ TEST_CASE("serialization of short strings")
{
CAPTURE(s)
const json j = s;
CHECK(j.dump() == "\"" + s + "\"");
CHECK(j.dump(-1, ' ', true) == "\"" + s + "\"");
CHECK(json({{s, s}}).dump() == "{\"" + s + "\":\"" + s + "\"}");
const std::string quoted = "\"" + s + "\""; // NOLINT(performance-inefficient-string-concatenation)
CHECK(j.dump() == quoted);
CHECK(j.dump(-1, ' ', true) == quoted);
CHECK(json({{s, s}}).dump() == "{" + quoted + ":" + quoted + "}"); // NOLINT(performance-inefficient-string-concatenation)
}
// a character that needs an escape
tests/src/unit-custom-object-key-type.cpp
+5 -3
View File
@@ -160,12 +160,12 @@ class strict_key
}
private:
std::string m_value{};
std::string m_value;
};
strict_key make_strict_key(const std::string& key)
{
return strict_key(key.c_str());
return {key.c_str()};
}
template<class Key, class Value, class Compare, class Allocator>
@@ -224,7 +224,9 @@ TEST_CASE("converting a value with keys that cannot be made from a std::string n
}
}
const strict_json converted = value;
// direct-initialization: a copy-initialization makes GCC 4.8 instantiate the
// copy constructor, which needs a range constructor strict_object lacks
const strict_json converted(value);
// at() needs to make a std::string of a key for its error message
const auto member = [](const strict_json & object, const char* name) -> const strict_json &
tests/src/unit-file_input.cpp
+133
View File
@@ -49,6 +49,14 @@ file_ptr open_with(const char* name, const std::string& content)
return {std::fopen(name, "rb"), &std::fclose};
}
// the smallest size setvbuf() accepts for _IOFBF: the Microsoft C runtime
// rejects sizes below 2 as an invalid parameter, which ends the process
#if defined(_WIN32)
constexpr int min_full_buffer = 2;
#else
constexpr int min_full_buffer = 1;
#endif
// The stdio lock is recursive, so whether parsing released it can only be
// seen from another thread: ftrylockfile() fails there while this thread
// holds the lock. ftrylockfile() is POSIX; elsewhere, the check is skipped.
@@ -225,6 +233,131 @@ TEST_CASE("parsing from a FILE*")
check_unlocked(f.get());
}
#if !defined(JSON_NOEXCEPTION)
SECTION("tokens across the edges of the file's buffer")
{
// the adapter reads the buffer of the FILE directly where it can (see
// JSON_FILE_WINDOW): with buffers of 1 to 70 bytes and none, every
// token crosses an edge somewhere; the results, the error messages
// and their positions must be those of the string
const std::vector<std::string> documents =
{
input,
R"({"long": "a string that is longer than the buffer of the file, with \"escapes\" and \u00e4", "n": [123456789012345678901, -0.000123e-45, 1.5E+300, 0, -0]})",
"[\n \"indented\",\n \"caf\xc3\xa9 \xe2\x82\xac \xf0\x9f\x98\x80\",\n {\n \"key\": 1\n }\n]",
R"({"a": [1, 2, 3], "b": "unterminated)",
R"([1, 2, 3, 1e999])",
R"({"a": "invalid escape \x"})",
"[\"invalid UTF-8 \xc3\x28\"]",
"[1, 2, 3] trailing",
R"([truex])",
};
for (const auto& document : documents)
{
std::string expected;
try
{
expected = json::parse(document).dump();
}
catch (const json::exception& e)
{
expected = e.what();
}
const bool expected_accept = json::accept(document);
for (int size = 0; size <= 70; ++size)
{
if (size != 0 && size < min_full_buffer)
{
continue;
}
CAPTURE(document)
CAPTURE(size)
std::vector<char> buffer(static_cast<std::size_t>(size) + 1);
for (int pass = 0; pass < 2; ++pass)
{
const file_ptr f = open_with(name, document);
REQUIRE(f != nullptr);
// size 0: unbuffered
REQUIRE(std::setvbuf(f.get(), size == 0 ? nullptr : buffer.data(), size == 0 ? _IONBF : _IOFBF, static_cast<std::size_t>(size)) == 0);
if (pass == 0)
{
std::string actual;
try
{
actual = json::parse(f.get()).dump();
}
catch (const json::exception& e)
{
actual = e.what();
}
CHECK(actual == expected);
}
else
{
CHECK(json::accept(f.get()) == expected_accept);
}
check_unlocked(f.get());
}
}
}
}
#endif
// the C standard guarantees only one pushed-back character (and the
// Windows C runtime fails further calls to ungetc()), so this is limited
// to the C libraries that keep them in a separate buffer
#if !defined(JSON_NOEXCEPTION) && ((defined(__GLIBC__) && !defined(__UCLIBC__)) || defined(__APPLE__))
SECTION("characters pushed back with ungetc() before parsing")
{
const file_ptr f = open_with(name, "2, 3]");
REQUIRE(f != nullptr);
REQUIRE(std::ungetc(',', f.get()) == ',');
REQUIRE(std::ungetc('1', f.get()) == '1');
REQUIRE(std::ungetc('[', f.get()) == '[');
CHECK(json::parse(f.get()) == json({1, 2, 3}));
}
#endif
SECTION("SAX events across the edges of the file's buffer")
{
const std::string document = R"({"key": "a value that is longer than the buffer", "n": [1, -2.5e3, true, null]})";
std::vector<long> expected;
{
const file_ptr f = open_with(name, document);
REQUIRE(f != nullptr);
position_reading_sax sax(f.get());
CHECK(json::sax_parse(f.get(), &sax));
expected = sax.positions();
}
for (int size = min_full_buffer; size <= 20; ++size)
{
CAPTURE(size)
std::vector<char> buffer(static_cast<std::size_t>(size));
const file_ptr f = open_with(name, document);
REQUIRE(f != nullptr);
REQUIRE(std::setvbuf(f.get(), buffer.data(), _IOFBF, buffer.size()) == 0);
position_reading_sax sax(f.get());
CHECK(json::sax_parse(f.get(), &sax));
// the events happen at the same positions of the file
CHECK(sax.positions() == expected);
}
}
SECTION("binary strings across the edges of the file's buffer")
{
const json value = {{"a string that is longer than the buffer of the file", "and a value that is longer, too"}, {"n", {1, 2}}};
const std::vector<std::uint8_t> cbor = json::to_cbor(value);
for (int size = min_full_buffer; size <= 20; ++size)
{
CAPTURE(size)
std::vector<char> buffer(static_cast<std::size_t>(size));
const file_ptr f = open_with(name, std::string(reinterpret_cast<const char*>(cbor.data()), cbor.size()));
REQUIRE(f != nullptr);
REQUIRE(std::setvbuf(f.get(), buffer.data(), _IOFBF, buffer.size()) == 0);
CHECK(json::from_cbor(f.get()) == value);
}
}
SECTION("binary formats read from a FILE*")
{
const json j = {{"string", std::string(300, 'x')}, {"array", {1, 2, 3}}, {"number", 1.5}};
tests/src/unit-json_view.cpp
+37 -3
View File
@@ -105,19 +105,53 @@ template<typename T>
struct failing_allocator
{
using value_type = T;
// GCC 4.8's std::map takes these from the allocator instead of from
// std::allocator_traits
using pointer = T*;
using const_pointer = const T*;
using reference = T&;
using const_reference = const T&;
using size_type = std::size_t;
using difference_type = std::ptrdiff_t;
template<typename U>
struct rebind
{
using other = failing_allocator<U>;
};
failing_allocator() = default;
template<typename U>
explicit failing_allocator(const failing_allocator<U>& /*other*/) noexcept {}
T* allocate(std::size_t /*n*/) // NOLINT(readability-convert-member-functions-to-static)
[[noreturn]] T* allocate(std::size_t /*n*/) // NOLINT(readability-convert-member-functions-to-static)
{
throw std::bad_alloc();
}
void deallocate(T* /*p*/, std::size_t /*n*/) noexcept {} // NOLINT(readability-convert-member-functions-to-static)
// GCC 4.8's std::map calls these on the allocator directly instead of
// going through std::allocator_traits
std::size_t max_size() const noexcept // NOLINT(readability-convert-member-functions-to-static)
{
return (std::numeric_limits<std::size_t>::max)() / sizeof(T);
}
template<typename U, typename... Args>
void construct(U* p, Args&& ... args) // NOLINT(readability-convert-member-functions-to-static)
{
::new (static_cast<void*>(p)) U(std::forward<Args>(args)...);
}
template<typename U>
void destroy(U* p) noexcept // NOLINT(readability-convert-member-functions-to-static)
{
static_cast<void>(p); // unused for trivially destructible types
p->~U();
}
template<typename U>
bool operator==(const failing_allocator<U>& /*other*/) const noexcept
{
@@ -270,7 +304,7 @@ TEST_CASE("json_view")
"\"", "\"abc", "\"\\x\"", "\"\\u12\"", "\"\\ud800\"", "\"\\udc00\"", "\"\x01\"", "\"\xff\"", "\"\xc3\"", "[1]x", "/", "/*", "[\n 1,\n x\n]", // NOLINT(modernize-raw-string-literal)
"1e400", "-1e400", "[1.7976931348623159e308]", "{\"a\":\n{\"b\": [1, 2,\n 3 x]}}",
// (an error after every kind of value: the error is found by replaying the parser)
"[null, true, -1, 1, 1.5, \"s\", {\"a\": 1} 2]", "{\"a\": null, \"b\": -1, \"c\": 1.5, \"d\": \"s\", \"e\": {}, 1}"
R"([null, true, -1, 1, 1.5, "s", {"a": 1} 2])", R"({"a": null, "b": -1, "c": 1.5, "d": "s", "e": {}, 1})"
})
{
CAPTURE(text)
@@ -1556,7 +1590,7 @@ TEST_CASE("json_view values")
CHECK_THROWS_WITH_AS(not_an_object.root().get<view_map>(), json_view_test::message("type_error.302", "", 0, 5, "type must be object, but is array").c_str(), json::type_error&);
#if !defined(JSON_NOEXCEPTION)
// (and one that cannot allocate its nodes)
using failing_map = std::map<std::string, json_view, std::less<std::string>, failing_allocator<std::pair<const std::string, json_view>>>;
using failing_map = std::map<std::string, json_view, std::less<std::string>, failing_allocator<std::pair<const std::string, json_view>>>; // NOLINT(modernize-use-transparent-functors)
const json_document one_member = json_document::parse(R"({"a":1})");
CHECK_THROWS_AS(one_member.root().get<failing_map>(), std::bad_alloc&);
#endif
tests/src/unit-locale-cpp.cpp
+16 -8
View File
@@ -397,6 +397,14 @@ TEST_CASE("locale with a multi-byte decimal point")
// a value the locale-independent paths convert is not affected
CHECK(json::parse("12.5") == 12.5);
// dump() of a long double that takes the snprintf path replaces the
// whole decimal point, not only its first byte (#5993)
CHECK(long_double_json(1.5L).dump() == "1.5");
CHECK(long_double_json(2.0L).dump() == "2.0");
CHECK(long_double_json(-0.25L).dump() == "-0.25");
CHECK(long_double_json::parse(long_double_json(1.5e-7L).dump()) == long_double_json(1.5e-7L));
CHECK(long_double_json::parse(ld.dump()) == expected_long_double);
}
if (!tested)
{
@@ -505,8 +513,8 @@ struct locale_switching_token
{
using value_type = char;
locale_switching_token(std::string text_, const char* switch_to_)
: text(std::move(text_)), switch_to(switch_to_)
locale_switching_token(std::string text_, std::string switch_to_)
: text(std::move(text_)), switch_to(std::move(switch_to_))
{}
std::size_t size() const
@@ -523,13 +531,13 @@ struct locale_switching_token
{
if (!switched)
{
switched = std::setlocale(LC_NUMERIC, switch_to) != nullptr;
switched = std::setlocale(LC_NUMERIC, switch_to.c_str()) != nullptr;
}
return &text[0];
return &text[0]; // NOLINT(readability-container-data-pointer): std::string::data() is const before C++17
}
std::string text;
const char* switch_to;
std::string switch_to;
bool switched = false;
};
@@ -647,7 +655,7 @@ TEST_CASE("convert_float_locale_aware")
// "C" -> comma locale: strtod stops at the '.', so the conversion is repeated
{
locale_switching_token token("1.5", comma_locale.c_str());
locale_switching_token token("1.5", comma_locale);
double value = 0;
nlohmann::detail::convert_float_locale_aware(token, 1, value);
if (token.switched)
@@ -660,7 +668,7 @@ TEST_CASE("convert_float_locale_aware")
// the same for the other floating-point types
REQUIRE(std::setlocale(LC_NUMERIC, "C") != nullptr);
{
locale_switching_token token("2.25", comma_locale.c_str());
locale_switching_token token("2.25", comma_locale);
float value = 0;
nlohmann::detail::convert_float_locale_aware(token, 1, value);
if (token.switched)
@@ -670,7 +678,7 @@ TEST_CASE("convert_float_locale_aware")
}
REQUIRE(std::setlocale(LC_NUMERIC, "C") != nullptr);
{
locale_switching_token token("2.25", comma_locale.c_str());
locale_switching_token token("2.25", comma_locale);
long double value = 0;
nlohmann::detail::convert_float_locale_aware(token, 1, value);
if (token.switched)
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