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


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:
>             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,
> 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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