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From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-7051) Remove the "estimate match count" optimization from point queries
Date Mon, 29 Feb 2016 10:08:18 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-7051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15171692#comment-15171692
] 

Adrien Grand commented on LUCENE-7051:
--------------------------------------

I'll watch http://home.apache.org/~mikemccand/lucenebench/IntNRQ.html in the coming days to
make sure the nightly benchmarks agree this optimization was not necessary.

> Remove the "estimate match count" optimization from point queries
> -----------------------------------------------------------------
>
>                 Key: LUCENE-7051
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7051
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>             Fix For: 6.0
>
>         Attachments: LUCENE-7051.patch
>
>
> Point queries try to estimate the number of matches in the visitor so that the doc id
set that they build does not have to do it by itself. However, this is incorrect in the multi-valued
case and does not seem to buy much (if any) in terms of performance?



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