)]}'
{
  "commit": "dfb0ee822def4aee38b2b26beafb37bebbbda199",
  "tree": "edd85783e6da3cbce9a27e2d53bdd7e8eeb1ae86",
  "parents": [
    "a9842c9f87fe99af484acfb708065ee120ed44a0"
  ],
  "author": {
    "name": "Abseil Team",
    "email": "absl-team@google.com",
    "time": "Sat Oct 24 03:31:43 2026 -0700"
  },
  "committer": {
    "name": "Copybara-Service",
    "email": "copybara-worker@google.com",
    "time": "Tue Nov 10 22:28:24 2026 -0800"
  },
  "message": "Split immutable flag metadata out of mutable FlagImpl state.\n\nNearly half of each 56-byte `absl::flags_internal::FlagImpl` in writable data consists of compile-time metadata that never changes at runtime, including the flag name, type operation handler, help source, and initial default value. Keeping those immutable fields inside each `absl::Flag` instance forces every process that mutates nearby variables on the same page to fault private copies of static metadata.\n\nExtract the immutable metadata into a `FlagMeta` descriptor and leave only the descriptor pointer, mutex storage, initialization control, interned file ID, and atomic state byte in writable data. Separating constant metadata shrinks `FlagImpl` from 56 bytes to 32 bytes and scalar flags from 64 bytes to 40 bytes in writable data, preparing the descriptor layout for pointer-free read-only encodings in follow-up changes.\n\nPiperOrigin-RevId: 1006216333\n",
  "tree_diff": [
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      "new_path": "absl/flags/commandlineflag_test.cc"
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}