Github user SaintBacchus commented on the pull request:
https://github.com/apache/spark/pull/5152#issuecomment-85492976
@srowen Ok, I will take this `RDD` into the transformation of `coalesce`
later.
And about the performance, in our scenario we reused the cached RDD tens of
times.
So if coalescing the partition into one at the same executor without any
network transfer, the performance will obviously be improved. Actually 20% as
we tested.
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