GitHub - jart/json.cpp: JSON for Classic C++

json.cpp is a baroque JSON parsing / serialization library for C++. This project is a reaction against https://github.com/nlohmann/json/ which provides a modern C++ library for JSON. Our alternative: Goes 2x-3x faster. With gcc -O3 13.2 on Ubuntu 24.04 using an AMD Ryzen Threadripper PRO 7995WX this library was able to parse the complicated JSON example in json_test.cpp 3x faster than nlohmann's l