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https://issues.apache.org/jira/browse/MAHOUT-497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12907450#action_12907450
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Hudson commented on MAHOUT-497:
-------------------------------
Integrated in Mahout-Quality #263 (See
[https://hudson.apache.org/hudson/job/Mahout-Quality/263/])
> Matrix get/set causes allocation (?!)
> -------------------------------------
>
> Key: MAHOUT-497
> URL: https://issues.apache.org/jira/browse/MAHOUT-497
> Project: Mahout
> Issue Type: Bug
> Reporter: Ted Dunning
> Fix For: 0.4
>
>
> Matrix get and set check the array bounds. But checking the array bounds
> calls size. But size allocates a small integer
> array.
> This is evil and KILLs performance.
> The first fix is to avoid this in SGD based classifiers. Second will be a
> real change to the matrix routines to avoid the allocation.
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