)]}'
{
  "commit": "79a23c435c4862d0c7af3c2740662104c77171dc",
  "tree": "d21b31c76dee2e7d9a06a65a21eaad5e0c6615f8",
  "parents": [
    "ca3dc15d4ca3bb1b092928b456ea844637693b61"
  ],
  "author": {
    "name": "Thomas Van Lenten",
    "email": "thomasvl@google.com",
    "time": "Thu Mar 17 10:04:21 2016 -0400"
  },
  "committer": {
    "name": "Thomas Van Lenten",
    "email": "thomasvl@google.com",
    "time": "Thu Mar 17 10:04:21 2016 -0400"
  },
  "message": "Shrink ObjC overhead (generated size and some runtime sizes)\n\nNOTE: This is a binary breaking change as structure sizes have changed size\nand/or order.\n\n- Drop capturing field options, no other options were captured and other mobile\n  targeted languages don\u0027t try to capture this sort information (saved 8\n  bytes for every field defined (in static data and again in field descriptor\n  instance size data).\n- No longer generate/compile in the messages/enums in descriptor.proto. If\n  developers need it, they should generate it and compile it in. Reduced the\n  overhead of the core library.\n- Compute the number of has_bits actually needs to avoid over reserving.\n- Let the boolean single fields store via a has_bit to avoid storage, makes\n  the common cases of the instance size smaller.\n- Reorder some flags and down size the enums to contain the bits needed.\n- Reorder the items in the structures to manually ensure they are are packed\n  better (especially when generating 64bit code - 8 bytes for every field,\n  16 bytes for every extension, instance sizes 8 bytes also).\n- Split off the structure initialization so when the default is zero, the\n  generated static storage doesn\u0027t need to reserve the space. This is batched\n  at the message level, so all the fields for the message have to have zero\n  defaults to get the saves. By definition all proto3 syntax  files fall into\n  this case but it also saves space for the proto2 that use the standard\n  defaults. (saves 8 bytes of static data for every field that had a zero\n  default)\n- Don\u0027t track the enums defined by a message. Nothing in the runtime needs it\n  and it was just generation and runtime overhead. (saves 8 bytes per enum)\n- Ensure EnumDescriptors are started up threadsafe in all cases.\n- Split some of the Descriptor initialization into multiple methods so the\n  generated code isn\u0027t padded with lots of zero/nil args.\n- Change how oneof info is feed to the runtime enabling us to generate less\n  static data (8 bytes saved per oneof for 64bit).\n- Change how enum value informat is capture to pack the data and only decode\n  it if it ends up being needed. Avoids padding issues causing bloat of 64bit,\n  and removes the needs for extra pointers in addition to the data (just the\n  data and one pointer now).\n",
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