[ https://issues.apache.org/jira/browse/LUCENE-4100?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16203051#comment-16203051 ]
Robert Muir commented on LUCENE-4100: ------------------------------------- Can we avoid the ScoreMode.merge? This seems really, really confusing. In general I don't think we should support such merging in MultiCollector or anywhere else, we should simply throw exception if things are different. I think the enum should be further revisited/simplified: essentially at the minimum it must capture 2 booleans from the user: whether scores are needed, and whether exact total hit count is needed. Perhaps instead of the enum two booleans would be easier for now. I don't understand why we should set the totalHitCount to -1, vs setting to a useful approximation, like google. The user said they didn't need the exact total hit count, so it should be no surprise, and its a hell of a lot more useful than a negative number. > Maxscore - Efficient Scoring > ---------------------------- > > Key: LUCENE-4100 > URL: https://issues.apache.org/jira/browse/LUCENE-4100 > Project: Lucene - Core > Issue Type: Improvement > Components: core/codecs, core/query/scoring, core/search > Affects Versions: 4.0-ALPHA > Reporter: Stefan Pohl > Labels: api-change, gsoc2014, patch, performance > Fix For: 4.9, 6.0 > > Attachments: LUCENE-4100.patch, LUCENE-4100.patch, > contrib_maxscore.tgz, maxscore.patch > > > At Berlin Buzzwords 2012, I will be presenting 'maxscore', an efficient > algorithm first published in the IR domain in 1995 by H. Turtle & J. Flood, > that I find deserves more attention among Lucene users (and developers). > I implemented a proof of concept and did some performance measurements with > example queries and lucenebench, the package of Mike McCandless, resulting in > very significant speedups. > This ticket is to get started the discussion on including the implementation > into Lucene's codebase. Because the technique requires awareness about it > from the Lucene user/developer, it seems best to become a contrib/module > package so that it consciously can be chosen to be used. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org