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| hardware | None |
| os | None |
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| git_commit |
commit aca28f10da54526a7955f62f090273b588888b6d Author: Nikolas Klauser <nikolasklauser@berlin.de> Date: Wed Nov 12 15:53:37 2025 +0100 [libc++] Optimize __tree copy/move constructor/assignment with allocator (#163558) This patch applies the same optimization as implemented in #151304 to the overloads taking an allocator as the second argument. Apple M4: ``` Benchmark old new Difference % Difference ----------------------------------------------------------- -------------- -------------- ------------ -------------- std::map<int,_int>::ctor(&&,_different_allocs)/0 14.59 12.78 -1.81 -12.41% std::map<int,_int>::ctor(&&,_different_allocs)/1024 16407.05 6265.11 -10141.94 -61.81% std::map<int,_int>::ctor(&&,_different_allocs)/32 395.99 199.76 -196.23 -49.56% std::map<int,_int>::ctor(&&,_different_allocs)/8192 141478.67 53767.84 -87710.83 -62.00% std::map<int,_int>::ctor(const&,_alloc)/0 12.83 12.71 -0.12 -0.94% std::map<int,_int>::ctor(const&,_alloc)/1024 9979.71 7849.11 -2130.59 -21.35% std::map<int,_int>::ctor(const&,_alloc)/32 283.82 266.05 -17.77 -6.26% std::map<int,_int>::ctor(const&,_alloc)/8192 81418.63 63190.41 -18228.21 -22.39% std::map<std::string,_int>::ctor(&&,_different_allocs)/0 14.58 12.68 -1.90 -13.00% std::map<std::string,_int>::ctor(&&,_different_allocs)/1024 19513.56 7806.04 -11707.52 -60.00% std::map<std::string,_int>::ctor(&&,_different_allocs)/32 477.80 247.28 -230.52 -48.25% std::map<std::string,_int>::ctor(&&,_different_allocs)/8192 504558.78 69592.21 -434966.56 -86.21% std::map<std::string,_int>::ctor(const&,_alloc)/0 12.64 12.60 -0.04 -0.33% std::map<std::string,_int>::ctor(const&,_alloc)/1024 43198.53 37220.54 -5977.99 -13.84% std::map<std::string,_int>::ctor(const&,_alloc)/32 928.39 867.03 -61.36 -6.61% std::map<std::string,_int>::ctor(const&,_alloc)/8192 461313.81 389200.82 -72112.99 -15.63% ``` |
Filter
ldionne-old-macbook-results test results
| Run | Order | Start Time | Duration |
|---|---|---|---|
| Current | 559161 | 2025-12-16T16:40:01 | 0:00:00 |
| Previous | 559134 | 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) |
|---|---|---|---|---|---|---|
| 710_omnetpp_r | 1.42% | 8.386 | 8.504 | - | 0.00% | - |
| Performance Improvements - execution_time | Δ | Previous | Current | σ | Δ (B) | σ (B) |
|---|---|---|---|---|---|---|
| 735_gem5_r | -2.41% | 13.700 | 13.370 | - | 0.00% | - |
| 727_cppcheck_r | -2.31% | 25.065 | 24.486 | - | 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 |
| 735_gem5_r |
| 736_ocio_r |
| 737_gmsh_r |
| 748_flightdm_r |
| 750_sealcrypto_r |
| 753_ns3_r |
| 766_femflow_r |
Report Time: 0.08s