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https://issues.apache.org/jira/browse/LUCENE-7811?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-7811:
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Attachment: LUCENE-7811.patch
Patch, I think it's ready.
> Add concurrent version of SortedSetDocValuesFacetCounts
> -------------------------------------------------------
>
> Key: LUCENE-7811
> URL: https://issues.apache.org/jira/browse/LUCENE-7811
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: master (7.0), 6.6
>
> Attachments: LUCENE-7811.patch
>
>
> Counting up facets should take advantage of concurrent hardware if the index
> has multiple segments.
> At first I tried to add an optional {{ExecutorService}} argument to the
> existing single-threaded {{SortedSetDocValuesFacetCounts}} but it was
> difficult, so I just made a new class.
> I also internally refactored {{SortedSetDocValuesFacetCounts}} to share code
> between its {{count}} and {{countAll}} private methods, and switched the
> {{FacetsCollector}} to use {{DocIdSetBuilder}} instead of always using a
> {{FixedBitSet}}.
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