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https://issues.apache.org/jira/browse/LUCENE-6309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14341588#comment-14341588
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Michael McCandless commented on LUCENE-6309:
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+1, nice
> disable coord when scores are not needed, or the scoring fn does not use it
> ---------------------------------------------------------------------------
>
> Key: LUCENE-6309
> URL: https://issues.apache.org/jira/browse/LUCENE-6309
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Robert Muir
> Attachments: LUCENE-6309.patch
>
>
> In BooleanWeight when disableCoord is set, things are nicer. coord makes
> things complex (e.g. sometimes requires some crazy scorers in
> BooleanTopLevelScorers) and can block optimizations.
> We should also implicitly disableCoord when scores are not needed, or when
> the Similarity does not use coord().
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