Github user robbinspg commented on the pull request:
https://github.com/apache/spark/pull/12397#issuecomment-211247119
I haven't ran any explicit performance tests for this. Do we have any
specific to this area?
Using the static final boolean is allowing the jit to eliminate the dead
code path. I discussed an alternative implementation with @nongli in
https://github.com/apache/spark/pull/10628#issuecomment-205993243 and the
if(...) implementation was deemed ok.
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