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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3830) MappingCharFilter could be improved by switching to an FST.
Date Fri, 04 May 2012 15:50:49 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13268469#comment-13268469
] 

Michael McCandless commented on LUCENE-3830:
--------------------------------------------

bq. Shouldnt this be done when you build the NormalizeCharMap instead?

Duh, yes!  I'll fix.
                
> 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, 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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