)]}'
{
  "commit": "d797a87a4091af6ae0063e3c8291429c15318bdc",
  "tree": "87b93832afc3f0e1a27baf549d9837e8783b0c78",
  "parents": [
    "41675682dc9df836bf15845064cfe1087619c79d"
  ],
  "author": {
    "name": "Sameer Agarwal",
    "email": "sameeragarwal@google.com",
    "time": "Thu Apr 02 13:57:56 2020 -0700"
  },
  "committer": {
    "name": "Sameer Agarwal",
    "email": "sameeragarwal@google.com",
    "time": "Thu Apr 02 14:12:20 2020 -0700"
  },
  "message": "Use Ridders\u0027 method in GradientChecker.\n\nUsing Ridders\u0027 method gives orders of magnitude more accuracy compared\nto central differences. This will make things slower, but this is\nprimarily a testing/debugging feature and the speed hit is not a\nconcern. This should also reduce the false positive rates when users\nenable check_gradients. This is reflected the increased sensitivity of\nthe tests for GradientChecker.\n\nhttps://github.com/ceres-solver/ceres-solver/issues/554\n\nChange-Id: I6b871c72df55be1c31175ba062cf3c1e94e4b662\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "411a67f866b3aad32a90c6fbb4672e65d89bce12",
      "old_mode": 33188,
      "old_path": "internal/ceres/gradient_checker.cc",
      "new_id": "ef56666970da00e3cfad06982a1ea997eff330d7",
      "new_mode": 33188,
      "new_path": "internal/ceres/gradient_checker.cc"
    },
    {
      "type": "modify",
      "old_id": "cd194a7dd3ccb36da2cd45b3111abe3491cd33c9",
      "old_mode": 33188,
      "old_path": "internal/ceres/gradient_checker_test.cc",
      "new_id": "b2dd35ef61cfccab31f2af62cd41cc166320c4fb",
      "new_mode": 33188,
      "new_path": "internal/ceres/gradient_checker_test.cc"
    }
  ]
}