[jira] [Updated] (LUCENE-4688) Reuse TermsEnum in BlockTreeTermsReader

["Uwe Schindler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-4688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Uwe Schindler updated LUCENE-4688:
----------------------------------

    Fix Version/s:     (was: 4.3)
                   4.4
    
> Reuse TermsEnum in BlockTreeTermsReader
> ---------------------------------------
>
>                 Key: LUCENE-4688
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4688
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/codecs
>    Affects Versions: 4.0, 4.1
>            Reporter: Simon Willnauer
>             Fix For: 4.4
>
>         Attachments: LUCENE-4688.patch
>
>
> Opening a TermsEnum comes with a significant cost at this point if done frequently like primary key lookups or if many segments are present. Currently we don't reuse it at all and create a lot of objects even if the enum is just used for a single seekExact (ie. TermQuery). Stressing the Terms#iterator(reuse) call shows significant gains with reuse...

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