)]}'
{
  "log": [
    {
      "commit": "e1402125e8363b49e176c6072893d1c110a05d2f",
      "tree": "44ec055be78cdcb8086a598cbf791f8c4627e157",
      "parents": [
        "86decb6a3e3ebba8c3c67bfd25c12d9a85794f65"
      ],
      "author": {
        "name": "David Srbecky",
        "email": "dsrbecky@google.com",
        "time": "Wed Jun 13 18:20:45 2018 +0100"
      },
      "committer": {
        "name": "David Srbecky",
        "email": "dsrbecky@google.com",
        "time": "Thu Jun 14 12:31:44 2018 +0100"
      },
      "message": "Move some helper methods to DexRegisterLocation.\n\nTest: test-art-host-gtest-stack_map_test\nChange-Id: I0abab008159db023d531df69214cd3bb8c0639bd\n"
    },
    {
      "commit": "6de8833fb64e59301eada4005ed04da995796170",
      "tree": "9f5b731ae1c0428cf5dcae4105936a7a165a43c9",
      "parents": [
        "d97e0828958fd14a962e37af2865bc2e628547ce"
      ],
      "author": {
        "name": "David Srbecky",
        "email": "dsrbecky@google.com",
        "time": "Sun Jun 03 12:00:11 2018 +0100"
      },
      "committer": {
        "name": "David Srbecky",
        "email": "dsrbecky@google.com",
        "time": "Thu Jun 07 12:00:18 2018 +0100"
      },
      "message": "Delta-compress register maps in stack maps.\n\nThe register maps tend to be similar from stack map to stack map,\nso instead of encoding them again, store only the modified ones.\n\nThe dex register bitmap stores the delta now - if register has\nbeen modified since the previous stack map, the bit will be set.\n\nThe decoding logic scans backwards through stack maps until it\neventfully finds the most recent value of each register.\n\nThis CL saves ~2.5% of .oat file size (~10% of stackmap size).\n\nDue to the scan, this makes dex register decoding slower by factor\nof 2.5, but that still beats the old algorithm before refactoring.\n\nTest: test-art-host-gtest-stack_map_test\nChange-Id: Id5217a329eb757954e0c9447f38b05ec34118f84\n"
    },
    {
      "commit": "71ec1cc0665cdb9d39f4fd284d68962020417a53",
      "tree": "8d19b11ab3e04213c46b1b12ae94dbf54b305bfb",
      "parents": [
        "03f16e4de1e3289414888fe0a5104205a781bd2f"
      ],
      "author": {
        "name": "David Srbecky",
        "email": "dsrbecky@google.com",
        "time": "Fri May 18 15:57:25 2018 +0100"
      },
      "committer": {
        "name": "David Srbecky",
        "email": "dsrbecky@google.com",
        "time": "Fri Jun 01 13:26:46 2018 +0100"
      },
      "message": "Rewrite dex register map encoding in stackmaps.\n\nSimplify code by encoding dex register maps using BitTables.\nThe overall design is unchanged (bitmask+indices+catalogue).\n\nThis CL saves ~0.4% of .oat file size.\n\nThe dex register map decoding is factor of 3 faster now\n(based on the time to verify the register maps on Arm).\nThis is not too surprising as the old version was O(n^2).\n\nIt also reduces compiler arena memory usage by 11% since the\nBitTableBuilder is more memory efficient, we store less\nintermediate data, and we deduplicate most data on the fly.\n\nTest: test-art-host-gtest-stack_map_test\nChange-Id: Ib703a5ddf7f581280522d589e4a2bfebe53c26a9\n"
    }
  ]
}