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https://issues.apache.org/jira/browse/MAHOUT-1148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13571796#comment-13571796
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Ted Dunning commented on MAHOUT-1148:
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Well, Jake predicted a speedup. But this is a big difference.
> 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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