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https://issues.apache.org/jira/browse/LUCENE-10481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17510809#comment-17510809
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Mike Drob commented on LUCENE-10481:
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I _think_ the use case would be to collect facets over only the top N documents
that match a query and if we're doing that search without a TopDocsCollector?
I'm not entirely certain what the motivation was.
Our use case that is significantly improved by this was a boolean query with
several filter clauses where we only want the facet counts and don't care about
the documents themselves.
> FacetsCollector does not need scores when not keeping them
> ----------------------------------------------------------
>
> Key: LUCENE-10481
> URL: https://issues.apache.org/jira/browse/LUCENE-10481
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
> Reporter: Mike Drob
> Priority: Major
> Time Spent: 20m
> Remaining Estimate: 0h
>
> FacetsCollector currently always specifies ScoreMode.COMPLETE, we could get
> better performance by not requesting scores when we don't need them.
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