Nikolas Klauser
49bced456c
[libc++] Add basic constant folding for std::format ( #107197 )
...
```
-------------------------------------------------------------------
Benchmark old new
-------------------------------------------------------------------
BM_format_string<char>/1 42.1 ns 7.67 ns
BM_format_string<char>/2 22.3 ns 3.84 ns
BM_format_string<char>/4 10.6 ns 1.92 ns
BM_format_string<char>/8 5.31 ns 0.815 ns
BM_format_string<char>/16 2.79 ns 0.480 ns
BM_format_string<char>/32 1.63 ns 0.550 ns
BM_format_string<char>/64 0.782 ns 0.276 ns
BM_format_string<char>/128 0.397 ns 0.145 ns
BM_format_string<char>/256 0.211 ns 0.066 ns
BM_format_string<char>/512 0.154 ns 0.035 ns
BM_format_string<char>/1024 0.146 ns 0.021 ns
BM_format_string<char>/2048 0.125 ns 0.033 ns
BM_format_string<char>/4096 0.097 ns 0.016 ns
BM_format_string<char>/8192 0.077 ns 0.012 ns
BM_format_string<char>/16384 0.066 ns 0.010 ns
BM_format_string<char>/32768 0.062 ns 0.016 ns
BM_format_string<char>/65536 0.062 ns 0.016 ns
BM_format_string<char>/131072 0.443 ns 0.015 ns
BM_format_string<char>/262144 0.629 ns 0.017 ns
BM_format_string<char>/524288 0.715 ns 0.020 ns
BM_format_string<char>/1048576 0.757 ns 0.020 ns
BM_format_string<wchar_t>/1 38.8 ns 34.0 ns
BM_format_string<wchar_t>/2 19.4 ns 16.9 ns
BM_format_string<wchar_t>/4 9.88 ns 8.45 ns
BM_format_string<wchar_t>/8 6.30 ns 6.47 ns
BM_format_string<wchar_t>/16 3.11 ns 3.21 ns
BM_format_string<wchar_t>/32 1.60 ns 1.63 ns
BM_format_string<wchar_t>/64 0.899 ns 0.925 ns
BM_format_string<wchar_t>/128 0.676 ns 0.693 ns
BM_format_string<wchar_t>/256 0.658 ns 0.685 ns
BM_format_string<wchar_t>/512 0.556 ns 0.531 ns
BM_format_string<wchar_t>/1024 0.428 ns 0.402 ns
BM_format_string<wchar_t>/2048 0.328 ns 0.319 ns
BM_format_string<wchar_t>/4096 0.276 ns 0.274 ns
BM_format_string<wchar_t>/8192 0.252 ns 0.251 ns
BM_format_string<wchar_t>/16384 0.248 ns 0.246 ns
BM_format_string<wchar_t>/32768 0.229 ns 0.232 ns
BM_format_string<wchar_t>/65536 0.248 ns 0.246 ns
BM_format_string<wchar_t>/131072 0.250 ns 0.240 ns
BM_format_string<wchar_t>/262144 3.03 ns 3.03 ns
BM_format_string<wchar_t>/524288 3.14 ns 3.15 ns
BM_format_string<wchar_t>/1048576 3.60 ns 3.61 ns
BM_string_without_formatting<char> 32.2 ns 0.470 ns
BM_string_without_formatting<wchar_t> 38.8 ns 10.2 ns
```
2025-05-15 10:37:32 +02:00
Louis Dionne
6a9279ca40
[libc++] Slight reorganization of the benchmarks ( #119625 )
...
Move various container benchmarks to the same subdirectory, and regroup
some format-related benchmarks.
2024-12-12 08:14:50 -05:00
Louis Dionne
b2d2494731
[libc++] Make benchmarks forward-compatible with the test suite ( #114502 )
...
This patch fixes warnings and errors that come up when running the
benchmarks as part of the test suite. It also adds the necessary Lit
annotations to make it pass in various configurations and increases the
portability of the benchmarks.
2024-11-05 09:08:00 -05:00
Mark de Wever
d54b1cfa38
[libc++][format][1/3] Adds more benchmarks. ( #101803 )
...
This patch is the start of a series to improve the speed of std::format,
std::format_to, std::format_to_n, and std::formatted_size.
This is mostly achieved by changing the __output_buffer class. This new
__output_buffer class also makes it easier to implement buffering for
P3107R5 "Permit an efficient implementation of std::print"
2024-10-06 18:18:57 +02:00
