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Re:C++ String Conversion: Exploring std:from_chars in C++17 ... by deeringc on Monday October 14, 2024 @06:01AM (#41835965)
There's also the new Ryu algorithm that is being used, which is probably the biggest speed up.

https://github.com/ulfjack/ryu

Re:C++ String Conversion: Exploring std:from_chars in C++17 ... by badmintonbaseba on Monday October 14, 2024 @07:06AM (#41836369)
AFAIK the state of the art now is "dragonbox":

https://github.com/jk-jeon/dragonbox