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https://issues.apache.org/jira/browse/LUCENE-871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12520234
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Mark Miller commented on LUCENE-871:
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Pretty sure you still want this guys patch. It avoids a slow StringBuffer and
has a fail fast check before switching each char against a rather large list.
In the case that there are not that many accents it is much faster, and in
either case the replacement of StringBuffer is much faster. Probably
complements 969.
> ISOLatin1AccentFilter a bit slow
> --------------------------------
>
> Key: LUCENE-871
> URL: https://issues.apache.org/jira/browse/LUCENE-871
> Project: Lucene - Java
> Issue Type: Bug
> Components: Analysis
> Affects Versions: 1.9, 2.0.0, 2.0.1, 2.1, 2.2
> Reporter: Ian Boston
> Fix For: 2.3
>
> Attachments: fasterisoremove1.patch, fasterisoremove2.patch,
> ISOLatin1AccentFilter.java.patch
>
>
> The ISOLatin1AccentFilter is a bit slow giving 300+ ms responses when used in
> a highligher for output responses.
> Patch to follow
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