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https://issues.apache.org/jira/browse/LUCENE-7519?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless resolved LUCENE-7519.
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Resolution: Fixed
Fix Version/s: (was: 6.3)
> Optimize computing browse-only facets for taxonomy and sorted set methods
> -------------------------------------------------------------------------
>
> Key: LUCENE-7519
> URL: https://issues.apache.org/jira/browse/LUCENE-7519
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: master (7.0)
>
> Attachments: LUCENE-7519.patch
>
>
> For the "browse facets" use case, where logically you run
> {{MatchAllDocsQuery}} and then compute facet hits, we can optimize this case
> for both {{SortedSetDocValuesFacets}} and {{FastTaxonomyFacetCounts}} so that
> we don't use the query DISI at all and rather just pull from the doc values
> iterator using {{nextDoc}}.
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