[ 源代码： fast-float ]
软件包：libfast-float-dev（3.9.0-1）
Implementation of the C++ from_chars functions for float and double types
The fast_float library provides fast header-only implementations for the C++ from_chars functions for float and double types. These functions convert ASCII strings representing decimal valuesinto binary types. This library provides exact rounding (including round to even). These fast_float functions run many times faster than comparable number-parsing functions from existing C++ standard libraries.