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Posted to dev@mahout.apache.org by "Sebastian Schelter (JIRA)" <ji...@apache.org> on 2014/03/03 17:31:22 UTC

[jira] [Commented] (MAHOUT-1429) Parallelize YtransposeY in ImplicitFeedbackAlternatingLeastSquaresSolver

    [ https://issues.apache.org/jira/browse/MAHOUT-1429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13918224#comment-13918224 ] 

Sebastian Schelter commented on MAHOUT-1429:
--------------------------------------------

Very nice, did you conduct some kind of benchmark to see what benefit your changes give to the user?

> Parallelize YtransposeY in ImplicitFeedbackAlternatingLeastSquaresSolver
> ------------------------------------------------------------------------
>
>                 Key: MAHOUT-1429
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1429
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Collaborative Filtering
>    Affects Versions: 0.9
>            Reporter: Adam Ilardi
>            Priority: Minor
>              Labels: newbie, patch, performance
>         Attachments: MAHOUT-1429.patch
>
>
> I wrote a simple patch to do the calculation in parallel. It could be better but it gets the job done. Is there some other (Matrix transpose dot matrix) code in mahout that is already parallel? I will reuse that if it exists.  



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