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https://issues.apache.org/jira/browse/LUCENE-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13398800#comment-13398800
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Han Jiang commented on LUCENE-3892:
-----------------------------------
And same codes with the wikimediumhard.tasks file.(This is really a hard
testcase, since QPS are so small that we can hardly depend on Pct Diff :) )
{noformat}
Task QPS Base StdDev Base QPS For StdDev For Pct
diff
AndHighMed 10.76 0.21 6.47 0.32 -43% -
-35%
AndHighHigh 2.89 0.08 2.57 0.19 -20% -
-1%
SpanNear 0.60 0.01 0.55 0.01 -11% -
-6%
SloppyPhrase 0.61 0.01 0.57 0.01 -9% -
-3%
PKLookup 87.72 2.61 86.28 1.48 -6% -
3%
Fuzzy1 36.22 1.14 35.90 0.97 -6% -
5%
Phrase 1.22 0.03 1.22 0.08 -9% -
8%
Respell 32.84 0.92 33.55 0.87 -3% -
7%
IntNRQ 3.66 0.35 3.74 0.08 -8% -
15%
Fuzzy2 21.62 0.66 22.10 0.51 -3% -
7%
Prefix3 13.30 0.49 14.09 0.76 -3% -
15%
OrHighMed 3.43 0.16 3.65 0.45 -10% -
25%
OrHighHigh 1.66 0.09 1.79 0.22 -10% -
28%
Wildcard 3.39 0.14 3.74 0.20 0% -
21%
TermBGroup1M1P 1.84 0.03 2.10 0.16 3% -
25%
TermGroup1M 1.14 0.03 1.34 0.10 5% -
29%
TermBGroup1M 1.49 0.05 1.78 0.13 7% -
32%
Term 3.49 0.13 4.38 0.65 2% -
49%
{noformat}
> 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-direct-IntBuffer.patch,
> LUCENE-3892_for.patch, LUCENE-3892_for_byte[].patch,
> LUCENE-3892_for_int[].patch, LUCENE-3892_for_unfold_method.patch,
> LUCENE-3892_pfor.patch, LUCENE-3892_pfor.patch, LUCENE-3892_pfor.patch,
> LUCENE-3892_pfor_unfold_method.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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