Github user chouqin commented on the pull request:
https://github.com/apache/spark/pull/2595#issuecomment-57411737
Hi, @mengxr @jkbradley thanks for your comments, I have changed my code
accordingly.
As for performance, I didn't test it on a large dataset, could you give me
some data to test and maybe I can find why we don't get much performance gain?
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