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From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-7268) Remove ArrayUtil.timSort?
Date Sun, 01 May 2016 19:38:12 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-7268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15265905#comment-15265905
] 

Adrien Grand commented on LUCENE-7268:
--------------------------------------

+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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