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https://issues.apache.org/jira/browse/MAHOUT-1148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Dunning resolved MAHOUT-1148.
---------------------------------

    Resolution: Fixed

OK.  That was a silly last minute change that went with the wrong polarity.
                
> QR Decomposition is too slow
> ----------------------------
>
>                 Key: MAHOUT-1148
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1148
>             Project: Mahout
>          Issue Type: Bug
>            Reporter: Ted Dunning
>
> A user reported that QR decomposition is too slow.  I coded up a replacement 
> that can be 10x faster under certain cases and the new version is also tested.

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