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https://issues.apache.org/jira/browse/LUCENE-4857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13607696#comment-13607696
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Commit Tag Bot commented on LUCENE-4857:
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[branch_4x commit] Simon Willnauer
http://svn.apache.org/viewvc?view=revision&revision=1458863
LUCENE-4857: Don't unnecessarily copy stem override map in StemmerOverrideFilter
> StemmerOverrideFilter should not copy the stem override dictionary in it's
> ctor.
> --------------------------------------------------------------------------------
>
> Key: LUCENE-4857
> URL: https://issues.apache.org/jira/browse/LUCENE-4857
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/analysis
> Affects Versions: 4.0, 4.1, 4.2
> Reporter: Simon Willnauer
> Priority: Minor
> Fix For: 5.0, 4.2.1
>
> Attachments: LUCENE-4857.patch
>
>
> Currently the dictionary is cloned each time the token filter is created
> which is a serious bottleneck if you use this filter with large dictionaries
> and can also lead to OOMs if lots of those filters sit in ThreadLocals and
> new threads are added etc. I think cloning the map should be done in the
> analyzer (which all of our analyzers do btw. but this is the only TF that
> does that) no need to really copy that map.
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