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Posted to issues@lucene.apache.org by "David Smiley (Jira)" <ji...@apache.org> on 2021/01/14 05:13:00 UTC
[jira] [Commented] (SOLR-14765) optimize DocList creation by
skipping sort for sort-irrelevant cases
[ https://issues.apache.org/jira/browse/SOLR-14765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17264604#comment-17264604 ]
David Smiley commented on SOLR-14765:
-------------------------------------
Cool optimization! I'd be happy to review code in & around SolrIndexSearcher, as it relates to my crusade to eliminate Filter, so I'm rather familiar with the matters.
> 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
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 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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