[jira] [Commented] (LUCENE-3719) FVH: slow performance on very large queries

["Koji Sekiguchi (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-3719?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13195913#comment-13195913 ] 

Koji Sekiguchi commented on LUCENE-3719:
----------------------------------------

Thanks Igor for reporting the issue and providing the patch!
                
> FVH: slow performance on very large queries
> -------------------------------------------
>
>                 Key: LUCENE-3719
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3719
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: modules/highlighter
>    Affects Versions: 3.5, 4.0
>            Reporter: Igor Motov
>            Assignee: Koji Sekiguchi
>            Priority: Minor
>             Fix For: 3.6, 4.0
>
>         Attachments: LUCENE-3719.patch
>
>
> The change from HashSet to ArrayList for flatQueries in LUCENE-3019 resulted in very significant slowdown in some of our e-discovery queries after upgrade from 3.4.0 to 3.5.0. Our queries sometime contain tens of thousands of terms. As a result, major portion of execution time for such queries is now spent in the flatQueries.contains( sourceQuery ) method calls.

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