Github user ggevay commented on the issue:
https://github.com/apache/flink/pull/1517
> 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.
Thanks, I've added this to my notes.
> 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.
A problem would arise in `EntryIterator`: after reading a record, we
wouldn't know where the next record starts. (As it is now, it always starts
right after the previous.)
Thanks @greghogan for pushing this forward. I think I have addressed all
your comments.
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