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https://issues.apache.org/jira/browse/LUCENE-7419?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir updated LUCENE-7419:
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Attachment: LUCENE-7419.patch
Here is one solution. There may be other ways to fix this.
> 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
> 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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