)]}'
{
  "commit": "848d62464cf951be9a2bb66c3cb80f42e72f89b5",
  "tree": "d7a50090d1ab07f2e2825cca4d8c903a664c59fc",
  "parents": [
    "f2186f9c463f786e355c792d31edd00b5697ac45"
  ],
  "author": {
    "name": "Natalie Chouinard",
    "email": "chouinard@google.com",
    "time": "Mon Sep 21 12:17:08 2026 -0700"
  },
  "committer": {
    "name": "dawn-scoped@luci-project-accounts.iam.gserviceaccount.com",
    "email": "dawn-scoped@luci-project-accounts.iam.gserviceaccount.com",
    "time": "Mon Sep 21 12:17:08 2026 -0700"
  },
  "message": "[litert-lm] Disable shader caches\n\nThe current LiteRT-LM benchmark exhibits bimodal performance in Init\nExecutor on the Linux GTX 1660, suspected to be due to host GPU driver\nshader caches persisting between runs. Although testing the SPIR-V\ndriver compilation is not particularly relevant for us to measure, it\u0027s\nso much larger than the tint compilation time that any change to tint\u0027s\ncompilation time affecting Init Executor time would be lost. Still\nunlikely we would catch it with this perf test since it\u0027s \u003c10% of Init,\nbut worth monitoring in a more deterministic way anyways. This change\nshould make a clean cold start to the full shader compilation for all\nplatforms currently tested, plus preemptively on Mesa.\n\nBug: 562993169\nChange-Id: Ia4f2025adc3af9b19e36a76ab95ab511c6d39aee\nCq-Include-Trybots: luci.dawn.try:dawn-try-linux-x64-nvidia-gtx1660-rel,dawn-try-mac-arm64-apple-m2-rel\nInclude-Ci-Only-Tests: ci:dawn-linux-x64-nvidia-gtx1660-rel,ci:dawn-mac-arm64-apple-m2-rel|litert_lm_benchmark\nReviewed-on: https://dawn-review.googlesource.com/c/dawn/+/343075\nCommit-Queue: Natalie Chouinard \u003cchouinard@google.com\u003e\nReviewed-by: dan sinclair \u003cdsinclair@chromium.org\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "c8562780597c1e7f0831b2ee1bb3f95bfdac9a7b",
      "old_mode": 33261,
      "old_path": "scripts/run_litert_lm_benchmark.py",
      "new_id": "8c49a36c517bcda11161bf5e5524cc7886308d0c",
      "new_mode": 33261,
      "new_path": "scripts/run_litert_lm_benchmark.py"
    }
  ]
}