)]}'
{
  "commit": "001659f1e3ce0712df6cd773af3a0af816510ddf",
  "tree": "cd53e946e49d0583fa153157b7d28729de708871",
  "parents": [
    "7a55cd2f657d4a2f233cef74eadf73a24a200cdb"
  ],
  "author": {
    "name": "Vitaly Goldshteyn",
    "email": "goldvitaly@google.com",
    "time": "Wed Oct 21 02:47:29 2026 -0700"
  },
  "committer": {
    "name": "Copybara-Service",
    "email": "copybara-worker@google.com",
    "time": "Wed Oct 21 02:48:03 2026 -0700"
  },
  "message": "Store hasher and allocator offsets in PolicyFunctions instead of accessor function pointers.\n\n`PolicyFunctions` carried two per-instantiation accessor functions, `hash_fn` and `get_char_alloc`, whose only job was to compute the address of the hasher and of the allocator from a `CommonFields\u0026`. Every type-erased growth, rehash, and copy path paid an indirect call for what is a compile-time constant offset, the calls acted as optimization barriers (values had to be moved into callee-saved registers or spilled around them).\n\nReplace the two function pointers with 32 bit offsets computed with `offsetof`.\n\n`sizeof(PolicyFunctions)` shrinks from 72 to 64 bytes (one cache line), `GetRefForEmptyClass` and the per-instantiation accessor functions disappear, and the type-erased code in `raw_hash_set.cc` shrinks by 95 bytes (-0.45%) in optimized builds.\n\nPiperOrigin-RevId: 1003783299\n",
  "tree_diff": [
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