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https://issues.apache.org/jira/browse/SOLR-1850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hoss Man updated SOLR-1850:
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Fix Version/s: 4.0
Correcting Fix Version based on CHANGES.txt, see this thread for more details...
http://mail-archives.apache.org/mod_mbox/lucene-dev/201005.mbox/%[email protected]%3e
> KeepWordFilter can be slow at query time if wordlist is large
> -------------------------------------------------------------
>
> Key: SOLR-1850
> URL: https://issues.apache.org/jira/browse/SOLR-1850
> Project: Solr
> Issue Type: Improvement
> Components: Schema and Analysis
> Affects Versions: 1.4
> Reporter: John Wang
> Fix For: 3.1, 4.0
>
>
> In the case when "Set<String> words" is large, constructing a KeepWordFilter
> at query time is very costly because of the construction (copy) of the set,
> e.g.:
> this.words = new CharArraySet(words, ignoreCase);
> This call does an addAll on the set, and is done for each query, and is the
> same work.
> Suggestion: overload the constructor and expose the CharArraySet, e.g.:
> public KeepWordFilter(TokenStream in, CharArraySet words ) {
> super(in);
> this.words = words;
> this.termAtt = (TermAttribute)addAttribute(TermAttribute.class);
> }
> This allows the ability to have CharArraySet to be constructed once staticly
> for the application instead at query time.
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