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https://issues.apache.org/jira/browse/LUCENE-1410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-1410:
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Attachment: LUCENE-1410.patch
Very rough patch with some non-committable optimizations.
The biggest issue was that we were not using the buik-read API when scoring,
because the doc IDs are deltas and because we had to take deletions into
account. I hacked around this (and other issues)...
I ran some perf tests, described at
http://chbits.blogspot.com/2010/08/lucene-performance-with-pfordelta-codec.html
The results are encouraging! FOR/PFOR gets sizable gains for certain queries.
> PFOR implementation
> -------------------
>
> Key: LUCENE-1410
> URL: https://issues.apache.org/jira/browse/LUCENE-1410
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Index
> Reporter: Paul Elschot
> Priority: Minor
> Attachments: autogen.tgz, for-summary.txt,
> LUCENE-1410-codecs.tar.bz2, LUCENE-1410.patch, LUCENE-1410.patch,
> 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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