rapidyaml  0.6.0
parse and emit YAML, and do it fast
rapidyaml

You should also be aware that the Charconv utilities facilities in c4core are extremely fast, and generally outperform the fastest equivalent facilities in the standard library by a significant margin; refer to the documentation of Charconv utilities for further details. For example:

xtoa,int64_t
g++12, linux Visual Studio 2019
table