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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