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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1410) PFOR implementation
Date Fri, 02 Apr 2010 17:12:27 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12852868#action_12852868
] 

Michael McCandless commented on LUCENE-1410:
--------------------------------------------

Thanks for sharing these thorough results Renaud!

Curious that PFOR/FOR don't do well during searching...  have you tried profiling?  Maybe
something silly is going one.

One issue is MUST mixed with other clauses -- the scoring for such a query will do alot of
seeking, which for block based codecs will be costly.  But it's still strange you don't see
speedups for single term query.  Have you tried only SHOULD clauses?

> PFOR implementation
> -------------------
>
>                 Key: LUCENE-1410
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1410
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Other
>            Reporter: Paul Elschot
>            Priority: Minor
>         Attachments: autogen.tgz, for-summary.txt, LUCENE-1410-codecs.tar.bz2, LUCENE-1410b.patch,
LUCENE-1410c.patch, LUCENE-1410d.patch, LUCENE-1410e.patch, TermQueryTests.tgz, TestPFor2.java,
TestPFor2.java, TestPFor2.java
>
>   Original Estimate: 21840h
>  Remaining Estimate: 21840h
>
> Implementation of Patched Frame of Reference.

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