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https://issues.apache.org/jira/browse/LUCENE-9632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17244823#comment-17244823
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Michael Sokolov commented on LUCENE-9632:
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I just found a new use for IntroSorter - please don't remove! As for the util
methods, they're not doing any harm? I'd be -0 to migrate JDK impl for those
cases where we can; I mean sure, why not, but on the other hand if it's not
broke, why fix it? The test coverage is a benefit, although we could always
find another way, but like Uwe points out, we wouldn't really be saving any
maintenance costs, since we still need to maintain the core algorithm for the
parallel sorting case.
> Replace our TimSort with JDK TimSort
> ------------------------------------
>
> Key: LUCENE-9632
> URL: https://issues.apache.org/jira/browse/LUCENE-9632
> Project: Lucene - Core
> Issue Type: Improvement
> Affects Versions: master (9.0)
> Reporter: Mike Drob
> Priority: Major
>
> JDK 11 has a TimSort with very similar lineage to our TimSort (written by
> Josh Bloch, based on Tim Peter's python list sort), we should consider
> replacing our fork with a version that we don't have to maintain.
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