Michael Braun created LUCENE-8127:
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Summary: BooleanQuery with needsScores=false, rewriteNoScoring
improvement
Key: LUCENE-8127
URL: https://issues.apache.org/jira/browse/LUCENE-8127
Project: Lucene - Core
Issue Type: Improvement
Reporter: Michael Braun
In the case needsScores=false, createWeight calls rewriteNoScoring before
creating a new BooleanWeight. This in all cases creates a new BooleanQuery,
even when it's not necessary (aka there are no MUST clauses).
The rewriteNoScoring method could check for something as simple as if
(clauseSets.get(Occur.MUST).size() > 0) before creating a brand new
BooleanQuery.
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