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https://issues.apache.org/jira/browse/TEZ-3349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17191063#comment-17191063
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László Bodor commented on TEZ-3349:
-----------------------------------
[~gopalv]: do you think this still applies (JDK8, JDK11)? maybe I can do some
performance tests with a copied version of QuickSort, where the interface is
casted to SortSpan before looping: [^TEZ-3349.WIP.patch]
> 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 Vijayaraghavan
> Assignee: László Bodor
> Priority: Major
> Attachments: TEZ-3349.WIP.patch, 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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