Github user patmcdonough commented on the pull request:
https://github.com/apache/spark/pull/377#issuecomment-42990416
FYI @pwendell, @tdas, @sryza - just now circling back to this and finding
it hasn't made it's way in to 1.0.
It is probably better suited for the next release if it missed the perf
testing.
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