[jira] [Resolved] (LUCENE-7419) performance bug in tokenstream.end()

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-7419?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless resolved LUCENE-7419.
----------------------------------------
    Resolution: Fixed

OK I backported to 5.5.x branch so next release we do here will have it.

> performance bug in tokenstream.end()
> ------------------------------------
>
>                 Key: LUCENE-7419
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7419
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Robert Muir
>            Priority: Blocker
>             Fix For: master (7.0), 5.5.5, 6.2
>
>         Attachments: LUCENE-7419.patch
>
>
> TokenStream.end() calls getAttribute(), which is pretty costly to do per-stream.
> It does its current hack, because in the ctor of TokenStream is "too early".
> Instead, we can just add a variant of clear(), called end() to AttributeImpl. For most attributes it defers to clear, but for PosIncAtt it can handle the special case.



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