Michael McCandless created LUCENE-7519:
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Summary: 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), 6.3
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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