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Robert Muir commented on LUCENE-4100: ------------------------------------- Well that's why i wrote the "note: " :) Technically the better code would be: {code} if (indexOptions = DOCS_ONLY) { return 1; // tf values are omitted } ... {code} And yes when frequencies are present, according to the docs its allowed to return -1 here, but that was solely motivated by PreFlexCodec: (Lucene 3.x indexes). What actually returns -1 here for this case? We will never have maxScore working as long as we have such complexity: lets remove the problem. I faced this same issue in LUCENE-7997 and i think its easier to just enforce that docCount and sumDocFreq are always present, and that sumTotalTermFreq, and totalTermFreq are always present when term freqs are stored. > 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, 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