Github user greghogan commented on the issue:
https://github.com/apache/flink/pull/1517
+1 with just a few superficial comments.
Reading back through the discussion I see that there are many ideas for
future performance enhancements. If not already suggested I'd like to consider
skipping staging for fixed length records.
I'm missing why we can't update in place with smaller records. The
deserializer is responsible for detecting the end of the record and we wouldn't
need to change the pointer value when replacing with a smaller record.
CombineHint.NONE can be implemented in a new PR since this looks to be
ready as-is.
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