)]}'
{
  "commit": "04938efe4bedec112083c5ceb227ba004f96bd01",
  "tree": "cc66749a6d74384cb9304bf19673042e1a7bc86b",
  "parents": [
    "fa21df8cd969bb257b87c9ef7c0147d8d5ea8725"
  ],
  "author": {
    "name": "Keir Mierle",
    "email": "mierle@gmail.com",
    "time": "Sun Feb 17 12:37:55 2013 -0800"
  },
  "committer": {
    "name": "Keir Mierle",
    "email": "mierle@gmail.com",
    "time": "Mon Feb 18 15:00:30 2013 -0800"
  },
  "message": "Add support for removing parameter and residual blocks.\n\nThis adds support for removing parameter and residual blocks.\nThere are two modes of operation: in the first, removals of\nparemeter blocks are expensive, since each remove requires\nscanning all residual blocks to find ones that depend on the\nremoved parameter. In the other, extra memory is sacrificed to\nmaintain a list of the residuals a parameter block depends on,\nremoving the need to scan. In both cases, removing residual blocks\nis fast.\n\nAs a caveat, any removals destroys the ordering of the parameters,\nso the residuals or jacobian returned from Solver::Solve() is\nmeaningless. There is some debate on the best way to handle this;\nthe details remain for a future change.\n\nThis also adds some overhead, even in the case that fast removals\nare not requested:\n\n- 1 int32 to each residual, to track its position in the program.\n- 1 pointer to each parameter, to store the dependent residuals.\n\nChange-Id: I71dcac8656679329a15ee7fc12c0df07030c12af\n",
  "tree_diff": [
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