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Posted to dev@mahout.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2013/06/09 23:07:20 UTC

[jira] [Commented] (MAHOUT-1251) Optimize MinHashMapper

    [ https://issues.apache.org/jira/browse/MAHOUT-1251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13679160#comment-13679160 ] 

Hudson commented on MAHOUT-1251:
--------------------------------

Integrated in Mahout-Quality #2067 (See [https://builds.apache.org/job/Mahout-Quality/2067/])
    MAHOUT-1251 Optimize MinHashMapper (Revision 1491279)

     Result = FAILURE
ssc : 
Files : 
* /mahout/trunk/CHANGELOG
* /mahout/trunk/core/src/main/java/org/apache/mahout/clustering/minhash/MinHashDriver.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/clustering/minhash/MinHashMapper.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/clustering/minhash/MinHashReducer.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/clustering/minhash/MinhashOptionCreator.java
* /mahout/trunk/core/src/test/java/org/apache/mahout/clustering/minhash/TestMinHashClustering.java

                
> Optimize MinHashMapper
> ----------------------
>
>                 Key: MAHOUT-1251
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1251
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Clustering
>            Reporter: Sebastian Schelter
>            Assignee: Sebastian Schelter
>             Fix For: 0.8
>
>
> Remove unnecessary actions from MinHashMapper:
> It does a unnecessary string comparison per non-zero element of each input vector and it unnecessarily clones the input vector for each keyGroup

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