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https://issues.apache.org/jira/browse/LUCENE-6940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15075943#comment-15075943
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ASF subversion and git services commented on LUCENE-6940:
---------------------------------------------------------

Commit 1722443 from [~jpountz] in branch 'dev/trunk'
[ https://svn.apache.org/r1722443 ]

LUCENE-6940: Speed up MUST_NOT clauses.

> Bulk scoring could speed up MUST_NOT clauses
> --------------------------------------------
>
>                 Key: LUCENE-6940
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6940
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>         Attachments: LUCENE-6940.patch, LUCENE-6940.patch
>
>
> Today when you have MUST_NOT clauses, the ReqExclScorer is used and needs to 
> check the excluded clauses on every iteration. I suspect we could speed 
> things up by having a BulkScorer that would advance the excluded clause first 
> and then tell the required clause to bulk score up to the next excluded 
> document.



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