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From Cédrik LIME (JIRA) <j...@apache.org>
Subject [jira] Commented: (LUCENE-1183) TRStringDistance uses way too much memory (with patch)
Date Thu, 21 Feb 2008 13:59:19 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12571044#action_12571044
] 

Cédrik LIME commented on LUCENE-1183:
-------------------------------------

You caught me while I was finalizing a patch for FuzzyTermEnum... :-) I'll add it to this
bug report in the next few minutes.

> TRStringDistance uses way too much memory (with patch)
> ------------------------------------------------------
>
>                 Key: LUCENE-1183
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1183
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/*
>    Affects Versions: 1.9, 2.0.0, 2.1, 2.2, 2.3
>            Reporter: Cédrik LIME
>         Attachments: TRStringDistance.java, TRStringDistance.patch
>
>   Original Estimate: 0.17h
>  Remaining Estimate: 0.17h
>
> The implementation of TRStringDistance is based on version 2.1 of org.apache.commons.lang.StringUtils#getLevenshteinDistance(String,
String), which uses an un-optimized implementation of the Levenshtein Distance algorithm (it
uses way too much memory). Please see Bug 38911 (http://issues.apache.org/bugzilla/show_bug.cgi?id=38911)
for more information.
> The commons-lang implementation has been heavily optimized as of version 2.2 (3x speed-up).
I have reported the new implementation to TRStringDistance.

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