Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/4445
These changes look good to me!
There is in fact a potential performance impact of this change. It would be
cool to get an understanding of the potential performance impact of only using
the HybridMemorySegment now.
We could run something like a Hash Join Performance test with key/value
pairs of String keys (which are the most performance sensitive to serialize /
deserialize with individual byte operations) and see if this has a measurable
impact there.
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