Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/1043#issuecomment-134603166
I think you currently pay quite a performance price for implementing the
compare methods in such a ways that they delegate to the `ByteComparator` and
`FloatComparator`. In order to call those, every single byte or float need to
be boxed.
That can be avoided if the method directly implements the array comparisons
on the primitive types.
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