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https://issues.apache.org/jira/browse/LUCENE-871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12521340
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Dawid Weiss commented on LUCENE-871:
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I guess it's a matter of just writing down two versions and comparing them
against each other. :)
Yonik: I don't think lookupswitch is O(1) -- my belief is that lookupswitch is
a binary search through the key set
http://java.sun.com/docs/books/jvms/second_edition/html/Compiling.doc.html#14942.
I guess you could _make_ it O(1) with perfect hashing, for example, but if I
were to guess it's not the reality. It's a good question though -- I'll have a
look at SUN's JVM sources in a spare moment.
> 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
> Assignee: Michael McCandless
> Fix For: 2.3
>
> Attachments: fasterisoremove1.patch, fasterisoremove2.patch,
> ISOLatin1AccentFilter.java.patch, LUCENE-871.take4.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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