Github user kayousterhout commented on the pull request:
https://github.com/apache/spark/pull/214#issuecomment-61938307
Hi @qqsun8819, as Matei mentioned, Spark now broadcasts RDD objects, so
it's very unlikely for task serialization to become a bottleneck. I closed the
associated JIRA -- would you mind closing this pull request?
Thanks for your work on this and sorry that it didn't end up being needed!
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