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https://issues.apache.org/jira/browse/LUCENE-2098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12845785#action_12845785
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Uwe Schindler commented on LUCENE-2098:
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bq. Why did this cause Solr to slowdown...? Did Solr previously have a more
efficient impl and then they cutover to Lucene's?
Solr used another Filter in 1.3.
> make BaseCharFilter more efficient in performance
> -------------------------------------------------
>
> Key: LUCENE-2098
> URL: https://issues.apache.org/jira/browse/LUCENE-2098
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Analysis
> Affects Versions: 3.1
> Reporter: Koji Sekiguchi
> Priority: Minor
> Attachments: LUCENE-2098.patch
>
>
> Performance degradation in Solr 1.4 was reported. See:
> http://www.lucidimagination.com/search/document/43c4bdaf5c9ec98d/html_stripping_slower_in_solr_1_4
> The inefficiency has been pointed out in BaseCharFilter javadoc by Mike:
> {panel}
> NOTE: This class is not particularly efficient. For example, a new class
> instance is created for every call to addOffCorrectMap(int, int), which is
> then appended to a private list.
> {panel}
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