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git_commit commit 1cac2be874c5f1b1b70bdaea8891f5e5b76a84e2
Author: Nikolas Klauser <nikolasklauser@berlin.de>
Date: Tue Aug 5 09:49:40 2025 +0200

[libc++] Optimize copy construction and assignment of __tree (#151304)

```
----------------------------------------------------------------------------------------------------------
Benchmark old new
----------------------------------------------------------------------------------------------------------
std::map<int, int>::ctor(const&)/0 15.5 ns 14.9 ns
std::map<int, int>::ctor(const&)/32 474 ns 321 ns
std::map<int, int>::ctor(const&)/1024 24591 ns 11101 ns
std::map<int, int>::ctor(const&)/8192 236153 ns 98868 ns
std::map<std::string, int>::ctor(const&)/0 15.2 ns 14.9 ns
std::map<std::string, int>::ctor(const&)/32 2673 ns 2340 ns
std::map<std::string, int>::ctor(const&)/1024 115354 ns 86088 ns
std::map<std::string, int>::ctor(const&)/8192 1298510 ns 626876 ns
std::map<int, int>::operator=(const&) (into cleared Container)/0 16.5 ns 16.1 ns
std::map<int, int>::operator=(const&) (into cleared Container)/32 548 ns 323 ns
std::map<int, int>::operator=(const&) (into cleared Container)/1024 28418 ns 11026 ns
std::map<int, int>::operator=(const&) (into cleared Container)/8192 281827 ns 97113 ns
std::map<int, int>::operator=(const&) (into populated Container)/0 2.42 ns 1.85 ns
std::map<int, int>::operator=(const&) (into populated Container)/32 369 ns 73.0 ns
std::map<int, int>::operator=(const&) (into populated Container)/1024 24078 ns 2322 ns
std::map<int, int>::operator=(const&) (into populated Container)/8192 266537 ns 22963 ns
std::map<std::string, int>::operator=(const&) (into cleared Container)/0 16.6 ns 16.2 ns
std::map<std::string, int>::operator=(const&) (into cleared Container)/32 2614 ns 1622 ns
std::map<std::string, int>::operator=(const&) (into cleared Container)/1024 116826 ns 63281 ns
std::map<std::string, int>::operator=(const&) (into cleared Container)/8192 1316655 ns 649177 ns
std::map<std::string, int>::operator=(const&) (into populated Container)/0 2.42 ns 1.89 ns
std::map<std::string, int>::operator=(const&) (into populated Container)/32 1264 ns 581 ns
std::map<std::string, int>::operator=(const&) (into populated Container)/1024 238826 ns 39943 ns
std::map<std::string, int>::operator=(const&) (into populated Container)/8192 2412327 ns 379456 ns
```

Fixes #77658
Fixes #62571
Filter

ldionne-old-macbook-results test results

Run Order Start Time Duration
Current 547428 2025-12-16T16:40:01 0:00:00
Previous 547427 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 1 0
Performance Improvements 2 0
Added Tests 0 16
Unchanged Tests 77 64
Total Tests 80

Performance Regressions - execution_time Δ Previous Current σ Δ (B) σ (B)
748_flightdm_r 1.65% 8.962 9.110 - 0.00% -

Performance Improvements - execution_time Δ Previous Current σ Δ (B) σ (B)
734_vpr_r -2.84% 15.535 15.094 - 0.00% -
737_gmsh_r -2.76% 13.494 13.122 - 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
736_ocio_r
737_gmsh_r
748_flightdm_r
750_sealcrypto_r
753_ns3_r
766_femflow_r


Report Time: 0.06s
Name Current %
706_stockfish_r 22.283 -
707_ntest_r 18.014 -
709_cactus_r 19.736 -
710_omnetpp_r 8.525 -
721_gcc_r 13.034 -
723_llvm_r 11.484 -
727_cppcheck_r 25.200 -
729_abc_r 18.745 -
731_astcenc_r 10.141 -
734_vpr_r 15.094 -2.84%
736_ocio_r 16.358 -
737_gmsh_r 13.122 -2.76%
748_flightdm_r 9.110 1.65%
750_sealcrypto_r 18.456 -
753_ns3_r 10.675 -
766_femflow_r 12.844 -
Geometric Mean 14.451 -