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| git_commit |
commit 46e88169284aadb06fafcbe18ff440ff0fdebfa3 Author: Connector Switch <c8ef@outlook.com> Date: Mon Oct 20 19:37:33 2025 +0800 [libcxx] Optimize std::generate for segmented iterators (#163006) Part of #102817. This patch attempts to optimize the performance of `std::generate` for segmented iterators. Below are the benchmark numbers from `libcxx\test\benchmarks\algorithms\modifying\generate.bench.cpp`. Test cases that use segmented iterators have also been added. - before ``` std::generate(deque<int>)/32 194 ns 193 ns 3733333 std::generate(deque<int>)/50 276 ns 276 ns 2488889 std::generate(deque<int>)/1024 5096 ns 5022 ns 112000 std::generate(deque<int>)/8192 40806 ns 40806 ns 17231 ``` - after ``` std::generate(deque<int>)/32 106 ns 105 ns 6400000 std::generate(deque<int>)/50 139 ns 138 ns 4977778 std::generate(deque<int>)/1024 2713 ns 2699 ns 248889 std::generate(deque<int>)/8192 18983 ns 19252 ns 37333 ``` --------- Co-authored-by: A. Jiang <de34@live.cn> |
Filter
ldionne-old-macbook-results test results
| Run | Order | Start Time | Duration |
|---|---|---|---|
| Current | 556536 | 2025-12-16T16:40:01 | 0:00:00 |
| Previous | 556797 | 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 | 1 | 0 |
| Added Tests | 0 | 16 |
| Unchanged Tests | 77 | 64 |
| Total Tests | 80 |
| Performance Regressions - execution_time | Δ | Previous | Current | σ | Δ (B) | σ (B) |
|---|---|---|---|---|---|---|
| 753_ns3_r | 1.53% | 10.099 | 10.254 | - | 0.00% | - |
| 727_cppcheck_r | 1.52% | 24.846 | 25.222 | - | 0.00% | - |
| Performance Improvements - execution_time | Δ | Previous | Current | σ | Δ (B) | σ (B) |
|---|---|---|---|---|---|---|
| 710_omnetpp_r | -1.21% | 8.512 | 8.409 | - | 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: 0.06s