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https://issues.apache.org/jira/browse/LUCENE-1632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12708659#action_12708659
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John Wang commented on LUCENE-1632:
-----------------------------------
I think we have an improvement for ConjuctionScorer as well with about 10%
improvement. We need to clean it up for a patch.
To make this clear, these are not algorithmic changes, there are code tuning
work performed on the same algorithm.
The naming is used to be consistent with the current Lucene class names, e.g.
DocIdSet, DocIdSetIterator.
Feel free to do more code tuning if you feel it would improve performance
further.
> boolean docid set iterator improvement
> --------------------------------------
>
> Key: LUCENE-1632
> URL: https://issues.apache.org/jira/browse/LUCENE-1632
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 2.4
> Reporter: John Wang
> Attachments: Lucene-1632-patch.txt
>
>
> This was first brought up in Lucene-1345. But Lucene-1345 conversation has
> digressed. As per suggested, creating a separate issue to track.
> Added perf comparisons with boolean set iterators with current scorers
> See patch
> System: Ubunto,
> java version "1.6.0_11"
> Intel core2 Duo 2.44ghz
> new milliseconds=470
> new milliseconds=534
> new milliseconds=450
> new milliseconds=443
> new milliseconds=444
> new milliseconds=445
> new milliseconds=449
> new milliseconds=441
> new milliseconds=444
> new milliseconds=445
> new total milliseconds=4565
> old milliseconds=529
> old milliseconds=491
> old milliseconds=428
> old milliseconds=549
> old milliseconds=427
> old milliseconds=424
> old milliseconds=420
> old milliseconds=424
> old milliseconds=423
> old milliseconds=422
> old total milliseconds=4537
> New/Old Time 4565/4537 (100.61715%)
> OrDocIdSetIterator milliseconds=1138
> OrDocIdSetIterator milliseconds=1106
> OrDocIdSetIterator milliseconds=1065
> OrDocIdSetIterator milliseconds=1066
> OrDocIdSetIterator milliseconds=1065
> OrDocIdSetIterator milliseconds=1067
> OrDocIdSetIterator milliseconds=1072
> OrDocIdSetIterator milliseconds=1118
> OrDocIdSetIterator milliseconds=1065
> OrDocIdSetIterator milliseconds=1069
> OrDocIdSetIterator total milliseconds=10831
> DisjunctionMaxScorer milliseconds=1914
> DisjunctionMaxScorer milliseconds=1981
> DisjunctionMaxScorer milliseconds=1861
> DisjunctionMaxScorer milliseconds=1893
> DisjunctionMaxScorer milliseconds=1886
> DisjunctionMaxScorer milliseconds=1885
> DisjunctionMaxScorer milliseconds=1887
> DisjunctionMaxScorer milliseconds=1889
> DisjunctionMaxScorer milliseconds=1891
> DisjunctionMaxScorer milliseconds=1888
> DisjunctionMaxScorer total milliseconds=18975
> Or/DisjunctionMax Time 10831/18975 (57.080368%)
> OrDocIdSetIterator milliseconds=1079
> OrDocIdSetIterator milliseconds=1075
> OrDocIdSetIterator milliseconds=1076
> OrDocIdSetIterator milliseconds=1093
> OrDocIdSetIterator milliseconds=1077
> OrDocIdSetIterator milliseconds=1074
> OrDocIdSetIterator milliseconds=1078
> OrDocIdSetIterator milliseconds=1075
> OrDocIdSetIterator milliseconds=1074
> OrDocIdSetIterator milliseconds=1074
> OrDocIdSetIterator total milliseconds=10775
> DisjunctionSumScorer milliseconds=1398
> DisjunctionSumScorer milliseconds=1322
> DisjunctionSumScorer milliseconds=1320
> DisjunctionSumScorer milliseconds=1305
> DisjunctionSumScorer milliseconds=1304
> DisjunctionSumScorer milliseconds=1301
> DisjunctionSumScorer milliseconds=1304
> DisjunctionSumScorer milliseconds=1300
> DisjunctionSumScorer milliseconds=1301
> DisjunctionSumScorer milliseconds=1317
> DisjunctionSumScorer total milliseconds=13172
> Or/DisjunctionSum Time 10775/13172 (81.80231%)
> AndDocIdSetIterator milliseconds=330
> AndDocIdSetIterator milliseconds=336
> AndDocIdSetIterator milliseconds=298
> AndDocIdSetIterator milliseconds=299
> AndDocIdSetIterator milliseconds=310
> AndDocIdSetIterator milliseconds=298
> AndDocIdSetIterator milliseconds=298
> AndDocIdSetIterator milliseconds=334
> AndDocIdSetIterator milliseconds=298
> AndDocIdSetIterator milliseconds=299
> AndDocIdSetIterator total milliseconds=3100
> ConjunctionScorer milliseconds=332
> ConjunctionScorer milliseconds=307
> ConjunctionScorer milliseconds=302
> ConjunctionScorer milliseconds=350
> ConjunctionScorer milliseconds=300
> ConjunctionScorer milliseconds=304
> ConjunctionScorer milliseconds=305
> ConjunctionScorer milliseconds=303
> ConjunctionScorer milliseconds=303
> ConjunctionScorer milliseconds=299
> ConjunctionScorer total milliseconds=3105
> And/Conjunction Time 3100/3105 (99.83897%)
> main contributors to the patch: Anmol Bhasin & Yasuhiro Matsuda
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