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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-1875) Use faster shallowCopy for dense matices in blockify drm/package.blockify(..)
Date Tue, 27 Dec 2016 10:27:58 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-1875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15780120#comment-15780120
] 

ASF GitHub Bot commented on MAHOUT-1875:
----------------------------------------

GitHub user smarthi opened a pull request:

    https://github.com/apache/mahout/pull/264

    MAHOUT-1875: Use faster shallowCopy for dense matices in blockify drm…

    …/package.blockify(..)

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/smarthi/mahout MAHOUT-1875

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/mahout/pull/264.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #264
    
----
commit 79fc120cea343d7a7a9ce4483117a58b48a71d1e
Author: smarthi <smarthi@apache.org>
Date:   2016-12-27T10:26:04Z

    MAHOUT-1875: Use faster shallowCopy for dense matices in blockify drm/package.blockify(..)

----


> Use faster shallowCopy for dense matices in blockify drm/package.blockify(..)
> -----------------------------------------------------------------------------
>
>                 Key: MAHOUT-1875
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1875
>             Project: Mahout
>          Issue Type: Improvement
>    Affects Versions: 0.12.2
>            Reporter: Andrew Palumbo
>            Assignee: Suneel Marthi
>             Fix For: 0.13.0
>
>
> In {{sparkbindings.drm/package.blockify(...)}}, after testing the density of an incoming
block, use {{DenseMatrix(blockAsArrayOfDoubles, true)}} to shallow copy the backing vector
array into the {{DenseMatrix}}.  



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