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https://issues.apache.org/jira/browse/TEZ-3349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15390245#comment-15390245
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Gopal V commented on TEZ-3349:
------------------------------
The movabs + cmp is a type check - I'm guessing for a JIT inline cache,
checking for the impl.
Doing that once per IndexedSortable::swap() seems to be excessive.
> Tez: PipelinedSorter - remove interface calls from the inner loop
> -----------------------------------------------------------------
>
> Key: TEZ-3349
> URL: https://issues.apache.org/jira/browse/TEZ-3349
> Project: Apache Tez
> Issue Type: Sub-task
> Reporter: Gopal V
> Attachments: movabs-check.png
>
>
> IndexedSortable is responsible for a huge degradation in sort performance in
> PipelinedSorter.
> With the TezRawComparator in place, the interface dispatch within indexed
> sortable is significantly affecting the speed of the sort impl.
> !movabs-check.png!
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