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https://issues.apache.org/jira/browse/SOLR-14765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17182105#comment-17182105
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Mike Drob commented on SOLR-14765:
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I've seen the combination of cursorMark, MatchAllDocs, and sort by score in the
wild before, and I've told people not to do it. It only leads to pain. They
really want to be using export handler in this type of scenario.
I haven't tried it with searchAfter or skipping sort directly.
> 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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