When a definite-length CBOR array opens and the input is contiguous, read
the integers, floats, booleans, and nulls that follow in a tight loop
instead of going through parse_cbor_internal's container logic and
parse_cbor_value's dispatch for every element. The loop stops at any other
kind of value and when fewer than 9 bytes are left; those values are read
by the general path exactly as before. Non-contiguous inputs are not
affected (tag dispatch on the bulk-scan capability).
Also pass a member empty string as the number source to number_float
instead of constructing a std::string for every float.
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Niels Lohmann
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