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From "Paul Elschot (JIRA)" <>
Subject [jira] Commented: (LUCENE-730) Restore top level disjunction performance
Date Mon, 16 Apr 2007 21:02:15 GMT


Paul Elschot commented on LUCENE-730:

Further to Yonik's answer, I have not done any tests with prohibited scorers comparing BooleanScorer
and BooleanScorer2.

It is quite possible that using skipTo() on any prohibited scorer (via BooleanScorer2) is
generally faster than using BooleanScorer. Prohibited clauses in queries are quite seldom,
so it is going to be difficult to find out whether a smaller value than 32 would be generally

> Restore top level disjunction performance
> -----------------------------------------
>                 Key: LUCENE-730
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Paul Elschot
>            Priority: Minor
>         Attachments: TopLevelDisjunction20061127.patch
> This patch restores the performance of top level disjunctions. 
> The introduction of BooleanScorer2 had impacted this as reported
> on java-user on 21 Nov 2006 by Stanislav Jordanov.

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