[jira] [Created] (SOLR-14765) optimize DocList creation by skipping sort for sort-irrelevant cases

["Michael Gibney (Jira)" <ji...@apache.org>]

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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