)]}'
{
  "commit": "2676b64efec12a98aa8f67b1dbdfbf0b9b8ce1bd",
  "tree": "ff64fab3c8f12d097c37b9effba1558d54a494dc",
  "parents": [
    "ce145d2f07f4d78a27b6aacc04150164796be8c6"
  ],
  "author": {
    "name": "Abseil Team",
    "email": "absl-team@google.com",
    "time": "Sat Oct 24 03:30:59 2026 -0700"
  },
  "committer": {
    "name": "Copybara-Service",
    "email": "copybara-worker@google.com",
    "time": "Fri Oct 30 13:39:20 2026 -0700"
  },
  "message": "Move rare flag callbacks and dynamic defaults into process-wide maps.\n\nFew `absl::Flag` instances ever register a mutation callback or override their default value at runtime. Despite that, every `absl::flags_internal::FlagImpl` in writable data reserves an 8-byte callback pointer and mutates its default-value union in place.\n\nStore registered callbacks and dynamic default overrides in process-wide `ThreadSafeMap` instances instead, gated by a 1-bit callback indicator and the existing 2-bit default-kind field so flags without overrides never acquire a map lock. Removing the inline callback pointer shrinks `FlagImpl` from 80 bytes to 72 bytes and scalar flags from 88 bytes to 80 bytes, while keeping the initial default-value union immutable for upcoming descriptor splitting.\n\nPiperOrigin-RevId: 1006216114\n",
  "tree_diff": [
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