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https://issues.apache.org/jira/browse/LUCENE-8757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16845598#comment-16845598
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ASF subversion and git services commented on LUCENE-8757:
---------------------------------------------------------

Commit dbfa8454e21bef1eb4ecabef7de6d801cadc2df8 in lucene-solr's branch 
refs/heads/branch_8x from Adrien Grand
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=dbfa845 ]

LUCENE-8757: Fix test bug.


> Better Segment To Thread Mapping Algorithm
> ------------------------------------------
>
>                 Key: LUCENE-8757
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8757
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Atri Sharma
>            Assignee: Simon Willnauer
>            Priority: Major
>             Fix For: master (9.0), 8.2
>
>         Attachments: LUCENE-8757.patch, LUCENE-8757.patch, LUCENE-8757.patch, 
> LUCENE-8757.patch, LUCENE-8757.patch, LUCENE-8757.patch, LUCENE-8757.patch, 
> LUCENE-8757.patch, LUCENE-8757.patch, LUCENE-8757.patch
>
>
> The current segments to threads allocation algorithm always allocates one 
> thread per segment. This is detrimental to performance in case of skew in 
> segment sizes since small segments also get their dedicated thread. This can 
> lead to performance degradation due to context switching overheads.
>  
> A better algorithm which is cognizant of size skew would have better 
> performance for realistic scenarios



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