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https://issues.apache.org/jira/browse/LUCENE-7268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15265905#comment-15265905
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Adrien Grand commented on LUCENE-7268:
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+1
I don't think it is expected to have advantages over Arrays.timSort. It'd be
interesting to try to understand why our timSort is slower, maybe it has a
performance bug.
> Remove ArrayUtil.timSort?
> -------------------------
>
> Key: LUCENE-7268
> URL: https://issues.apache.org/jira/browse/LUCENE-7268
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Robert Muir
> Attachments: LUCENE-7268_mods.patch
>
>
> Is there some workload where our timSort is better than the JDK one? Should
> we just remove ours if its slower?
> Not that its a great test, but i switched Polygon2D edge sorting (just the
> one where it says "sort the edges then build a balanced tree from them") from
> Arrays.sort to ArrayUtil.timSort and was surprised when performance was much
> slower for an enormous polygon
> (http://people.apache.org/~mikemccand/geobench/cleveland.poly.txt.gz)
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