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From Erlend GarĂ¥sen (JIRA) <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4542) Make RECURSION_CAP in HunspellStemmer configurable
Date Wed, 18 Sep 2013 11:40:53 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770680#comment-13770680
] 

Erlend GarĂ¥sen commented on LUCENE-4542:
----------------------------------------

Can someone please explain the purpose of recursionCap? So far I understand that it makes
it possible to adjust a so-called recursion depth, but I'm not sure I understand what it really
does. I had some problems with odd suggestions for the Norwegian language, but changing the
recursionCap to 0 did not help.
                
> Make RECURSION_CAP in HunspellStemmer configurable
> --------------------------------------------------
>
>                 Key: LUCENE-4542
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4542
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/analysis
>    Affects Versions: 4.0
>            Reporter: Piotr
>            Assignee: Steve Rowe
>             Fix For: 5.0, 4.4
>
>         Attachments: Lucene-4542-javadoc.patch, LUCENE-4542.patch, LUCENE-4542-with-solr.patch
>
>
> Currently there is 
> private static final int RECURSION_CAP = 2;
> in the code of the class HunspellStemmer. It makes using hunspell with several dictionaries
almost unusable, due to bad performance (f.ex. it costs 36ms to stem long sentence in latvian
for recursion_cap=2 and 5 ms for recursion_cap=1). It would be nice to be able to tune this
number as needed.
> AFAIK this number (2) was chosen arbitrary.
> (it's a first issue in my life, so please forgive me any mistakes done).

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