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https://issues.apache.org/jira/browse/LUCENE-3830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269210#comment-13269210
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Robert Muir commented on LUCENE-3830:
-------------------------------------
patch looks good: I guess the bulk read in RollingCharBuffer should help
other things like Kuromoji that use it too?!
> MappingCharFilter could be improved by switching to an FST.
> -----------------------------------------------------------
>
> Key: LUCENE-3830
> URL: https://issues.apache.org/jira/browse/LUCENE-3830
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Dawid Weiss
> Assignee: Michael McCandless
> Priority: Minor
> Labels: gsoc2012, lucene-gsoc-12
> Fix For: 4.0
>
> Attachments: LUCENE-3830.patch, LUCENE-3830.patch, LUCENE-3830.patch,
> PerfTestMappingCharFilter.java
>
>
> MappingCharFilter stores an overly complex tree-like structure for matching
> input patterns. The input is a union of fixed strings mapped to a set of
> fixed strings; an fst matcher would be ideal here and provide both memory and
> speed improvement I bet.
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