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https://issues.apache.org/jira/browse/LUCENE-2094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12797763#action_12797763
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Robert Muir commented on LUCENE-2094:
-------------------------------------
Simon, I think yonik refers to this code in stopfilter itself:
{code}
private StopFilter(Version matchVersion, boolean enablePositionIncrements,
TokenStream input, Set<?> stopWords, boolean ignoreCase){
super(input);
this.stopWords = CharArraySet.unmodifiableSet(new
CharArraySet(matchVersion, stopWords, ignoreCase));
{code}
it seems to me that if you pass a charArraySet to stopfilter, no matter what,
you get an expensive copy with "new"...?
> Prepare CharArraySet for Unicode 4.0
> ------------------------------------
>
> Key: LUCENE-2094
> URL: https://issues.apache.org/jira/browse/LUCENE-2094
> Project: Lucene - Java
> Issue Type: Bug
> Components: Analysis
> Affects Versions: 3.0
> Reporter: Simon Willnauer
> Assignee: Uwe Schindler
> Fix For: 3.1
>
> Attachments: LUCENE-2094.patch, LUCENE-2094.patch, LUCENE-2094.patch,
> LUCENE-2094.patch, LUCENE-2094.patch, LUCENE-2094.patch, LUCENE-2094.txt,
> LUCENE-2094.txt, LUCENE-2094.txt
>
>
> CharArraySet does lowercaseing if created with the correspondent flag. This
> causes that String / char[] with uncode 4 chars which are in the set can not
> be retrieved in "ignorecase" mode.
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