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Niels Lohmann a78e2a6b10 docs: blog post: remeasure on the 3.13.0 candidate and describe the latest performance work (#6041)
* 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>

* 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>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2026-11-10 07:12:46 +01:00

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<title id="nj-blog-heldout">Validating 19 files 3.13.0 was not tuned on: json_document&#x27;s time relative to the fastest other library per file</title>
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