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deps: don't busy loop in v8 cpu profiler thread #25268

Commits on May 8, 2015

  1. deps: don't busy loop in v8 cpu profiler thread

    Backport 6964a9e0685fa186d9d9b7907be17505e839db1a from upstream v8.
    
    Original commit message:
    
      Make CPU profiler do not hog 100% of CPU.
    
      Tick event processor should not stay in a tight loop
      when there's nothing to do. It can go sleep until next sample event.
    
      LOG=N
      BUG=v8:3967
      Committed: https://crrev.com/6964a9e0685fa186d9d9b7907be17505e839db1a
      Cr-Commit-Position: refs/heads/master@{#28211}
    
    Fixes nodejs#25137
    Related: nodejs#9439, nodejs#8789
    tunniclm committed May 8, 2015
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