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https://issues.apache.org/jira/browse/LUCENE-3664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13174703#comment-13174703
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Simon Willnauer commented on LUCENE-3664:
-----------------------------------------
here are some benchmark results using Java 1.6.0_30
{code}
Task QPS trunkStdDev trunkQPS jit_patchStdDev jit_patch
Pct diff
SloppyPhrase 2.73 0.16 2.72 0.15 -10% -
11%
TermBGroup1M1P 43.89 0.53 44.53 0.50 0% -
3%
TermBGroup1M 30.12 0.59 30.66 0.28 -1% -
4%
TermGroup1M 25.77 0.63 26.26 0.46 -2% -
6%
Term 49.82 2.63 51.23 2.15 -6% -
13%
Fuzzy1 73.03 3.70 75.19 1.73 -4% -
10%
Fuzzy2 48.70 2.29 50.23 0.97 -3% -
10%
Respell 51.05 3.14 52.75 1.51 -5% -
13%
AndHighHigh 11.18 0.36 11.56 0.21 -1% -
8%
OrHighMed 10.70 0.32 11.12 0.26 -1% -
9%
OrHighHigh 6.19 0.21 6.44 0.17 -2% -
10%
Prefix3 53.55 1.84 55.73 1.03 -1% -
9%
Wildcard 22.75 0.49 23.81 0.41 0% -
8%
SpanNear 5.48 0.37 5.79 0.13 -3% -
15%
PKLookup 96.23 2.02 101.66 4.39 0% -
12%
Phrase 6.55 0.61 6.93 0.41 -9% -
23%
AndHighMed 22.81 1.05 24.14 0.38 0% -
12%
IntNRQ 5.75 0.52 6.27 0.38 -6% -
27%
{code}
> Speed up SegementDocsAndPositionsEnum by making it more friendly for JIT
> optimizations
> --------------------------------------------------------------------------------------
>
> Key: LUCENE-3664
> URL: https://issues.apache.org/jira/browse/LUCENE-3664
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/search
> Affects Versions: 4.0
> Reporter: Simon Willnauer
> Priority: Minor
> Fix For: 4.0
>
> Attachments: LUCENE-3664.patch
>
>
> LUCENE-3648 applied some refactoring to make SegmentDocsEnum reuse some code
> and divorce the liveDocs and no-liveDocs case into sep classes to make more
> friendly for jit optimizations. I did the same thing for
> SegmentDocsAndPositions[AndPayloads]Enum removing a couple of hundred lines
> of code abstracting it into a base class. patch follows in a sec...
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