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Posted to dev@lucene.apache.org by "Jim Ferenczi (JIRA)" <ji...@apache.org> on 2018/07/31 14:32:00 UTC
[jira] [Commented] (LUCENE-8439) DisjunctionMaxScorer should
leverage sub scorers' per-block max scores
[ https://issues.apache.org/jira/browse/LUCENE-8439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16563761#comment-16563761 ]
Jim Ferenczi commented on LUCENE-8439:
--------------------------------------
Here is a patch that uses the same strategy to find blocks than LUCENE-8204.
I ran a benchmark using wikibigall and disjunction max queries on the Low/Med/High terms over the body and title fields.
Results below show a nice speed up with any tiebreaker value (except 1 since we rewrite to a boolean query in this case):
{noformat}
TaskQPS lucene_baseline StdDevQPS lucene_candidate StdDev Pct diff
LowTerm 121.15 (3.3%) 838.54 (33.6%) 592.1% ( 537% - 650%)
MedTerm 25.52 (5.1%) 385.07 (114.0%) 1409.1% (1227% - 1610%)
HighTerm 9.62 (5.6%) 183.10 (162.7%) 1803.6% (1548% - 2089%)
{noformat}
> DisjunctionMaxScorer should leverage sub scorers' per-block max scores
> ----------------------------------------------------------------------
>
> Key: LUCENE-8439
> URL: https://issues.apache.org/jira/browse/LUCENE-8439
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Jim Ferenczi
> Priority: Minor
> Attachments: LUCENE-8439.patch
>
>
> This issue is similar to https://issues.apache.org/jira/browse/LUCENE-8204 but for the DisjunctionMaxScorer.
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