lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-4100) Maxscore - Efficient Scoring
Date Tue, 24 Oct 2017 08:44:00 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-4100?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Adrien Grand updated LUCENE-4100:
---------------------------------
    Attachment: LUCENE-4100.patch

Here is an updated patch:
 * Scorer.maxScore() is now abstract
 * SimScorer.maxScore takes a float maxFreq that can be used to better bound the max score
(but nothing smart is done about it yet, I'd like to reserve it to follow-ups)
 * TopDocs.totalHits is no longer -1 when needsTotalHitCount is false, it is now an approximation.

> 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-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message