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https://issues.apache.org/jira/browse/LUCENE-7713?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-7713.
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    Resolution: Fixed

> Optimize TopFieldDocCollector for the sorted case
> -------------------------------------------------
>
>                 Key: LUCENE-7713
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7713
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Priority: Minor
>
> When the sort order is a prefix of the index sort order, 
> {{TopFieldDocCollector}} could skip reading doc values and comparing them 
> against the bottom value after {{numHits}} documents have been collected, and 
> just count matches.



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