Github user andrewor14 commented on the pull request:
https://github.com/apache/spark/pull/9478#issuecomment-160806983
@maropu thanks for running the benchmarks. It seems that the gains are not
really significant enough to warrant all the complexity this patch adds. This
is to a certain extent as expected since network is generally pretty fast, and
Spark tends to bottleneck on CPU rather than I/O or network.
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