Github user andrewor14 commented on the pull request:
https://github.com/apache/incubator-spark/pull/624#issuecomment-35792355
@pwendell I did a couple of tests locally and found a very slight speed-up
with the latest commit, which replaces the usages of ```isEmpty``` and
```size``` with ```length```. More details are included in the commit message
but I think this is ready for merge.
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