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From "Robert Muir (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3830) MappingCharFilter could be improved by switching to an FST.
Date Sun, 06 May 2012 13:07:50 GMT


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:
>             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,
> 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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