)]}'
{
  "commit": "18d8e6dca7d74c240aabf9f44eea540ae565efb2",
  "tree": "bc2adf2a5842fc9def1856804eb0c9340dd156a4",
  "parents": [
    "9d19a7870add65151ff91bcc26252bb7521065cf"
  ],
  "author": {
    "name": "Takuto Ikuta",
    "email": "tikuta@google.com",
    "time": "Wed Feb 18 22:48:05 2026 +0900"
  },
  "committer": {
    "name": "GN LUCI",
    "email": "gn-scoped@luci-project-accounts.iam.gserviceaccount.com",
    "time": "Wed Feb 18 06:20:13 2026 -0800"
  },
  "message": "[perf] Optimize HeaderChecker BFS using reserve()\n\nThis optimization adds breadcrumbs.reserve() to\nHeaderChecker::IsDependencyOf to reduce the number of rehashes in the\nvisited nodes map during BFS.\n\nPerformance Impact (Chromium \u0027gn gen --check\u0027 on macOS):\n- Baseline (origin/main): 66.5s ± 0.4s\n- With this change: 58.1s ± 0.6s (approx. 13% faster)\n\nBug: 484862257\nChange-Id: I4e011f8539e4b2a9343d25f12898a3bc2ab23a93\nReviewed-on: https://gn-review.googlesource.com/c/gn/+/21080\nReviewed-by: Sylvain Defresne \u003csdefresne@chromium.org\u003e\nCommit-Queue: David Turner \u003cdigit@google.com\u003e\nReviewed-by: David Turner \u003cdigit@google.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "20ed4bc57b3ce6db2c6324f632fcc5a52bb439e8",
      "old_mode": 33188,
      "old_path": "src/gn/header_checker.cc",
      "new_id": "ea76f2f5bb563c32456d9ec9091213cce2af84f4",
      "new_mode": 33188,
      "new_path": "src/gn/header_checker.cc"
    },
    {
      "type": "modify",
      "old_id": "0c88149c66f1347cffe972a8d4a308f6dc53b376",
      "old_mode": 33188,
      "old_path": "src/gn/header_checker.h",
      "new_id": "3f313fbf88fc0ac20e35ed87a2522b0cdb3aad05",
      "new_mode": 33188,
      "new_path": "src/gn/header_checker.h"
    }
  ]
}