Andrew Palumbo created MAHOUT-1875:
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             Summary: 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
             Fix For: 0.13.0


In {{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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