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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2010/08/07 15:36:19 UTC
[jira] Reopened: (LUCENE-1183) TRStringDistance uses way too much
memory (with patch)
[ https://issues.apache.org/jira/browse/LUCENE-1183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Muir reopened LUCENE-1183:
---------------------------------
Assignee: Robert Muir (was: Otis Gospodnetic)
these improvements only made it into fuzzyTERMenum but somehow didnt make it into fuzzyTERMSenum on flex branch, and aren't in trunk!
> 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
> Assignee: Robert Muir
> Priority: Minor
> Fix For: 3.0
>
> Attachments: FuzzyTermEnum.patch, 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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