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https://issues.apache.org/jira/browse/PHOENIX-1509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14241416#comment-14241416
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Andrew Purtell commented on PHOENIX-1509:
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bq. whereas FAST_DIFF also finds common bits in the value part of the KV
Only if the value is exactly the same as the value of the previous key IIRC.
Prefix tree encoding is promising but even late into the 0.98 release series
we are turning up data corruption bugs. To be fair, they were read side bugs,
and there are no known issues now.
> Investigate changing default encoding to PREFIX_encoding instead of FAST_DIFF
> -----------------------------------------------------------------------------
>
> Key: PHOENIX-1509
> URL: https://issues.apache.org/jira/browse/PHOENIX-1509
> Project: Phoenix
> Issue Type: Test
> Reporter: James Taylor
>
> [~lhofhansl] mentioned to me a performance evaluation that found
> PREFIX_ENCODING to be much less CPU intensive than FAST_DIFF (which is the
> default for Phoenix tables). We should perf test this ourselves and change
> the default if the results look good.
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