• ulan's avatar
    Optimize MarkCompactCollector::ClearNonLiveReferences. · ed357f96
    ulan authored
    This splits the work to be done for dead and life maps
    and avoids unnecessary operations in the hot loop.
    
    Results for v8.infinite_scroll:
    
    Before:
    nonlive_refs
      len: 93
      min: 0.0
      max: 6.3
      avg: 1.35268817204
      [0,5[: 91
      [5,10[: 2
    
    After:
    nonlive_refs
      len: 91
      min: 0.0
      max: 4.2
      avg: 0.968131868132
      [0,5[: 91
    
    BUG=chromium:554488
    LOG=no
    
    Review URL: https://codereview.chromium.org/1441633002
    
    Cr-Commit-Position: refs/heads/master@{#32042}
    ed357f96
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