)]}'
{
  "commit": "5a8cd237d4fad99d862aed51fab8cb5345c97013",
  "tree": "4de4d6d357ae7a12826f655ed39b09ce9f9a3c65",
  "parents": [
    "87e5904f5eb6398af6b22eac2802c78934260c48",
    "28266f3021ce80e4e7279cd49ee76b04eedb3f20"
  ],
  "author": {
    "name": "bors",
    "email": "bors@rust-lang.org",
    "time": "Tue Jul 21 03:33:11 2026 +0000"
  },
  "committer": {
    "name": "bors",
    "email": "bors@rust-lang.org",
    "time": "Tue Jul 21 03:33:11 2026 +0000"
  },
  "message": "Auto merge of #159149 - Kobzol:bootstrap-pgo-cargo, r\u003djieyouxu\n\nUse PGO for Cargo\n\n\r\n\r\nI downloaded the built Cargo and compared it with the parent commit locally on `bors` (which is of course not in the PGO training set). The results are quite nice:\r\n\r\n```\r\nBenchmark 1 (26 runs): cargo +babf6ea4aab9ed78ea9400b25b0e7e79a6870f29 test --no-run\r\n  measurement          mean ± σ            min … max           outliers         delta\r\n  wall_time           192ms ± 6.95ms     188ms …  226ms          1 ( 4%)        0%\r\n  peak_rss           96.3MB ±  354KB    95.6MB … 96.9MB          0 ( 0%)        0%\r\n  cpu_cycles          454M  ± 5.92M      448M  …  480M           1 ( 4%)        0%\r\n  instructions        797M  ± 5.68M      796M  …  825M           1 ( 4%)        0%\r\n  cache_references   32.7M  ±  352K     32.0M  … 34.0M           1 ( 4%)        0%\r\n  cache_misses       8.82M  ± 86.9K     8.67M  … 9.10M           1 ( 4%)        0%\r\n  branch_misses      3.76M  ± 41.3K     3.72M  … 3.93M           1 ( 4%)        0%\r\n\r\nBenchmark 2 (28 runs): cargo +b2aa8c0474895b96828df9c09182952caf6f6450 test --no-run\r\n  measurement          mean ± σ            min … max           outliers         delta\r\n  wall_time           185ms ± 7.07ms     175ms …  208ms          1 ( 4%)        ⚡-  3.9% ±  2.0%\r\n  peak_rss           90.9MB ±  207KB    90.4MB … 91.3MB          1 ( 4%)        ⚡-  5.6% ±  0.2%\r\n  cpu_cycles          420M  ± 9.31M      406M  …  440M           0 ( 0%)        ⚡-  7.7% ±  0.9%\r\n  instructions        736M  ± 5.47M      735M  …  764M           1 ( 4%)        ⚡-  7.6% ±  0.4%\r\n  cache_references   26.2M  ±  406K     25.7M  … 28.0M           2 ( 7%)        ⚡- 19.9% ±  0.6%\r\n  cache_misses       6.01M  ± 92.7K     5.85M  … 6.28M           1 ( 4%)        ⚡- 31.8% ±  0.6%\r\n  branch_misses      3.47M  ± 55.9K     3.40M  … 3.69M           1 ( 4%)        ⚡-  7.6% ±  0.7%\r\n```\r\n\r\n~7.5% icount improvement, that\u0027s pretty cool.",
  "tree_diff": []
}