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https://issues.apache.org/jira/browse/MAHOUT-1574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14020710#comment-14020710
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Hudson commented on MAHOUT-1574:
--------------------------------
FAILURE: Integrated in Mahout-Quality #2638 (See
[https://builds.apache.org/job/Mahout-Quality/2638/])
MAHOUT-1574 - Fixed regression in argument checking. (tdunning: rev
63b765abb305cca6d726f54549a92018754a6348)
* math/src/main/java/org/apache/mahout/math/SparseRowMatrix.java
> SparseRowMatrix needs performance improvement for times()
> ---------------------------------------------------------
>
> Key: MAHOUT-1574
> URL: https://issues.apache.org/jira/browse/MAHOUT-1574
> Project: Mahout
> Issue Type: Bug
> Reporter: Ted Dunning
> Assignee: Ted Dunning
>
> According to ssc,
> > * SparseRowMatrix with sequential vectors times SparseRowMatrix with
> > sequential vectors is totally broken, it uses three nested loops and uses
> > get(row, col) on the matrices, which internally uses binary search...
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