Github user markhamstra commented on the pull request:
https://github.com/apache/spark/pull/525#issuecomment-41299187
Did you actually find any benefit to adding this option? Previously, I
tried the same thing that you are doing in this PR (just a few lines earlier in
the file, right after the javacOptions), ran several duplicate incremental
builds from various starting states, differing in whether withNameHashing was
turned on or not, and I never found any clear advantage in terms of compile
time in that small sample.
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