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os None

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git_commit commit 49bced456c50fbb4e06543115b34e15585c7864b
Author: Nikolas Klauser <nikolasklauser@berlin.de>
Date: Thu May 15 10:37:32 2025 +0200

[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
```
Filter

ldionne-old-macbook-results test results

Run Order Start Time Duration
Current 537602 2025-12-16T16:40:01 0:00:00
Previous 537600 2025-12-16T16:40:01 0:00:00
Baseline 485288 2025-12-16T16:40:01 0:00:00


Tests Summary

Status Group # # (B)
Performance Regressions 2 0
Performance Improvements 2 0
Added Tests 0 18
Unchanged Tests 86 72
Total Tests 90

Performance Regressions - execution_time Δ Previous Current σ Δ (B) σ (B)
734_vpr_r 2.90% 15.186 15.627 - 0.00% -
735_gem5_r 1.78% 13.770 14.015 - 0.00% -

Performance Improvements - execution_time Δ Previous Current σ Δ (B) σ (B)
767_nest_r -2.01% 14.361 14.073 - 0.00% -
723_llvm_r -1.12% 11.562 11.432 - 0.00% -

Added Tests - execution_time
706_stockfish_r
707_ntest_r
709_cactus_r
710_omnetpp_r
721_gcc_r
723_llvm_r
727_cppcheck_r
729_abc_r
731_astcenc_r
734_vpr_r
735_gem5_r
736_ocio_r
737_gmsh_r
748_flightdm_r
750_sealcrypto_r
753_ns3_r
766_femflow_r
767_nest_r


Report Time: 0.09s
Name Current %
706_stockfish_r 21.994 -
707_ntest_r 18.407 -
709_cactus_r 19.760 -
710_omnetpp_r 8.492 -
721_gcc_r 12.960 -
723_llvm_r 11.432 -1.12%
727_cppcheck_r 24.476 -
729_abc_r 18.520 -
731_astcenc_r 10.177 -
734_vpr_r 15.627 2.90%
735_gem5_r 14.015 1.78%
736_ocio_r 16.259 -
737_gmsh_r 12.796 -
748_flightdm_r 8.925 -
750_sealcrypto_r 18.355 -
753_ns3_r 10.736 -
766_femflow_r 12.825 -
767_nest_r 14.073 -2.01%
Geometric Mean 14.357 -