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https://issues.apache.org/jira/browse/LUCENE-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Han Jiang updated LUCENE-3892:
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Attachment: LUCENE-3892_pfor.patch
Ah, just cannot wait for a performance optimization!
This version should now pass all tests below:
ant test-core -Dtests.postingsformat=PFor
It fixes: 1) trailing forced exceptions will be ignored and encoded as normal
value; 2) IntBuffer is maintained at IndexInput/Output level; 3) Former
nocommit issues such as BlockTreeTerms* and code licence.
The patch also contains a minimal change with the help of Robert's patch:
https://issues.apache.org/jira/secure/attachment/12530685/LUCENE-4102.patch.
Hope Dawid will commit the complete version into trunk soon!
I'll try to optimize these codes later.
> Add a useful intblock postings format (eg, FOR, PFOR, PFORDelta,
> Simple9/16/64, etc.)
> -------------------------------------------------------------------------------------
>
> Key: LUCENE-3892
> URL: https://issues.apache.org/jira/browse/LUCENE-3892
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Michael McCandless
> Labels: gsoc2012, lucene-gsoc-12
> Fix For: 4.1
>
> Attachments: LUCENE-3892_pfor.patch, LUCENE-3892_pfor.patch,
> LUCENE-3892_settings.patch, LUCENE-3892_settings.patch
>
>
> On the flex branch we explored a number of possible intblock
> encodings, but for whatever reason never brought them to completion.
> There are still a number of issues opened with patches in different
> states.
> Initial results (based on prototype) were excellent (see
> http://blog.mikemccandless.com/2010/08/lucene-performance-with-pfordelta-codec.html
> ).
> I think this would make a good GSoC project.
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