Github user sryza commented on the pull request:

    https://github.com/apache/spark/pull/2440#issuecomment-56132627
  
    Removing this sounds good to me too.  Will upload a patch.  I think a 
measure of how long a task spends in shuffle would be useful though, as it 
helps users understand whether task slowness is caused by their code or the 
framework.  (I've found a similar metric useful when trying to debug MR 
performance issues.)


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