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@ -53,12 +53,16 @@ int main() {
} }
``` ```
Like the C++17 standard, the `fast_float::from_chars` functions take an optional last argument of Like the C++17 standard, the `fast_float::from_chars` functions take an optional last argument of
the type `fast_float::chars_format`. It is a bitset value: we check whether the type `fast_float::chars_format`. It is a bitset value: we check whether
`fmt & fast_float::chars_format::fixed` and `fmt & fast_float::chars_format::scientific` are set `fmt & fast_float::chars_format::fixed` and `fmt & fast_float::chars_format::scientific` are set
to determine whether we allow the fixed point and scientific notation respectively. to determine whether we allow the fixed point and scientific notation respectively.
The default is `fast_float::chars_format::general` which allows both `fixed` and `scientific`. The default is `fast_float::chars_format::general` which allows both `fixed` and `scientific`.
We support Visual Studio, macOS, Linux, freeBSD.
## How fast is it? ## How fast is it?
It can parse random floating-point numbers at a speed of 1 GB/s on some systems. We find that it is often twice as fast as the best available competitor, and many times faster than many standard-library implementations. It can parse random floating-point numbers at a speed of 1 GB/s on some systems. We find that it is often twice as fast as the best available competitor, and many times faster than many standard-library implementations.
@ -72,6 +76,8 @@ abseil : 521.66 MB/s (+/- 3.2 %) 24.86 Min
fastfloat : 1061.86 MB/s (+/- 3.8 %) 50.61 Mint/s fastfloat : 1061.86 MB/s (+/- 3.8 %) 50.61 Mint/s
``` ```
See https://github.com/lemire/simple_fastfloat_benchmark for our benchmarking code.
## Using as a CMake dependency ## Using as a CMake dependency
This library is header-only by design. The CMake file provides the `fast_float` target This library is header-only by design. The CMake file provides the `fast_float` target