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https://issues.apache.org/jira/browse/LUCENE-7677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15870024#comment-15870024
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ASF subversion and git services commented on LUCENE-7677:
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Commit 1bfa057d5c9d89b116031baa7493ee422b4cbabb in lucene-solr's branch
refs/heads/branch_6x from [~jpountz]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=1bfa057 ]
LUCENE-7677: Cache compound filters earlier than regular filters.
> Cache compound filters earlier than regular queries
> ---------------------------------------------------
>
> Key: LUCENE-7677
> URL: https://issues.apache.org/jira/browse/LUCENE-7677
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-7677.patch
>
>
> Say you keep reusing a boolean filter that looks like "A OR B" and never use
> the A and B queries out of that boolean query. Currently, after this filter
> has been used 5 times, we would cache both A, B and "A OR B", which means
> that cache entries for A and B would only be built for the purpose of
> building a cache entry for "A OR B", which is wasteful.
> By caching compound queries a bit earlier, we could make it less likely to
> happen since:
> - we only consider queries as consumed if a scorer is pulled
> - once the boolean query is cached, we stop pulling scorers on the A and B
> queries
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