Michael Gibney created SOLR-14765:
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Summary: optimize DocList creation by skipping sort for
sort-irrelevant cases
Key: SOLR-14765
URL: https://issues.apache.org/jira/browse/SOLR-14765
Project: Solr
Issue Type: Improvement
Affects Versions: master (9.0)
Reporter: Michael Gibney
When {{rows=0}}, and for {{MatchAllDocsQuery}} and {{ConstantScoreQuery}} (and
possibly others?), it is possible for
{{SolrIndexSearcher.getDocListC(QueryResult, QueryCommand)}} to create a
DocList directly from {{filterCache}} DocSets -- similar to
{{useFilterForSortedQuery}}, but without actually sorting.
This results in significant benefits for high-recall domains, including the
common (and commonly-cached) use-case of {{q=\*:*}} and {{fq}}, facets, etc.
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