Fastfloat – C++ library 4x faster than strtod

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fast_float

15 1,269 8.7 C++

Fast and exact implementation of the C++ from_chars functions for number types: 4x to 10x faster than strtod, part of GCC 12 and WebKit/Safari
RapidJSON

15 13,852 6.1 C++

A fast JSON parser/generator for C++ with both SAX/DOM style API

The implementation buried inside RapidJSON is also very fast.
https://github.com/Tencent/rapidjson/blob/master/include/rap...

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