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https://issues.apache.org/jira/browse/SOLR-14765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17700365#comment-17700365
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Mikhail Khludnev commented on SOLR-14765:
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this might be related, but I'm unable to reproduce on my laptop
java.lang.AssertionError: expected:<19> but was:<10> at
org.apache.solr.search.TestMainQueryCaching.testConcurrentMatchAllDocsInitialization(TestMainQueryCaching.java:485)
https://jenkins.thetaphi.de/job/Solr-main-Windows/2484/testReport/junit/org.apache.solr.search/TestMainQueryCaching/testConcurrentMatchAllDocsInitialization/
> 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: 9.0
> Reporter: Michael Gibney
> Assignee: Michael Gibney
> Priority: Major
> Fix For: 9.1
>
> Attachments: SOLR-16585-reproducer.patch
>
> Time Spent: 14h
> 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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