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Enhance README with compiler optimization details

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Updated performance recommendations and compiler flags for C++.
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HedgehogInTheCPP 2025-12-26 21:36:32 +03:00 committed by GitHub
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@ -388,7 +388,10 @@ it's very likely because all parsers need to check the first character by itself
macros `FASTFLOAT_ONLY_ROUNDS_TO_NEAREST_SUPPORTED` if you only need `FE_TONEAREST` rounding mode in the parsing; this option macros `FASTFLOAT_ONLY_ROUNDS_TO_NEAREST_SUPPORTED` if you only need `FE_TONEAREST` rounding mode in the parsing; this option
also improves performance a bit and reduces code size. In the high-performance example, I also use the [fmt library](https://github.com/fmtlib/fmt), which also also improves performance a bit and reduces code size. In the high-performance example, I also use the [fmt library](https://github.com/fmtlib/fmt), which also
supports all C++ standards since C++11. I also recommend using `string_view` everywhere if it's possible; it's available supports all C++ standards since C++11. I also recommend using `string_view` everywhere if it's possible; it's available
since C++17, and if you want maximum performance, use the latest compiler with the latest C++ with O3 optimization and LTO! since C++17, and if you want maximum performance, use the latest compiler with the latest C++ with maximum optimization:
```
-O3 -DNDEBUG + LTO
```
```C++ ```C++
#define FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN #define FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN
#define FASTFLOAT_ISNOT_CHECKED_BOUNDS #define FASTFLOAT_ISNOT_CHECKED_BOUNDS