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https://issues.apache.org/jira/browse/LUCENE-7330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15329073#comment-15329073
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Adrien Grand commented on LUCENE-7330:
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Nightly benchmarks seem to confirm the speedup is real:
http://people.apache.org/~mikemccand/lucenebench/AndHighHigh.html
> Speed up conjunctions
> ---------------------
>
> Key: LUCENE-7330
> URL: https://issues.apache.org/jira/browse/LUCENE-7330
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-7330.patch
>
>
> I am digging into some performance regressions between 4.x and 5.x which seem
> to be due to how we always run conjunctions with ConjunctionDISI now while
> 4.x had FilteredQuery, which was optimized for the case that there are only
> two clauses or that one of the clause supports random access. I'd like to
> explore the former in this issue.
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