)]}'
{
  "commit": "66c43f9931f20a40897a406455e0f591c619b62c",
  "tree": "1cb3bdebdd19d0bb580b76d62d006673f3faba0f",
  "parents": [
    "9b38c456f3f0c0f934d08230f339772e1f9ff9aa"
  ],
  "author": {
    "name": "Protobuf Team Bot",
    "email": "protobuf-github-bot@google.com",
    "time": "Wed Oct 14 19:55:03 2026 -0700"
  },
  "committer": {
    "name": "Copybara-Service",
    "email": "copybara-worker@google.com",
    "time": "Wed Oct 14 20:00:12 2026 -0700"
  },
  "message": "Shrink upb_MiniTableExtension by removing sub member\n\nRemove the `sub` union member from `struct upb_MiniTableExtension` so\nthat extensions without sub-messages or closed enums do not pay for\nunused sub storage. When an extension has a sub, it is stored in trailing\n`upb_MiniTableSubInternal` storage directly after the\n`upb_MiniTableExtension`, described by the new internal\n`upb_MiniTableExtensionWithSub` type.\n\nDetails:\n\n*   The MiniDescriptor decoder computes the trailing sub offset\n    (`submsg_ofs`) for the target platform\u0027s pointer size. The minitable\n    generator emits it via `UPB_SIZE(ofs32, ofs64)`, so 32-bit builds get the\n    correct offset. The decoder writes the sub only when building for the\n    native platform.\n*   The minitable generator declares `\u003cext\u003e_obj` as either\n    `upb_MiniTableExtensionWithSub` or a bare `upb_MiniTableExtension`, and\n    emits a `UPB_STATIC_ASSERT` that the sub\u0027s offset in\n    `upb_MiniTableExtensionWithSub` matches `submsg_ofs` on every platform.\n*   Add `_upb_MiniTableField_Sub()`, which locates a field\u0027s sub from\n    `submsg_ofs`, and use it everywhere that calculation was duplicated\n    (MiniTable sub getters, extension sub setters, `upb_MiniTable_SetSub*()`,\n    and the MiniDescriptor decoder).\n*   Add `_upb_MiniTableField_HasSub()` for the \"sub-message or closed enum\"\n    check used to decide whether a field has a sub.\n*   `upb_FieldDef` builds extension MiniTables with\n    `_upb_MiniTableExtension_Build()` instead of duplicating the\n    \"has sub\" logic and the allocation size.\n\nPiperOrigin-RevId: 999800168\n",
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