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From Arne Plöse (JIRA) <j...@apache.org>
Subject [jira] [Created] (MATH-623) Use implementation of JAMA for ArrayRealVector operators
Date Wed, 20 Jul 2011 09:46:58 GMT
Use implementation of JAMA for ArrayRealVector operators
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                 Key: MATH-623
                 URL: https://issues.apache.org/jira/browse/MATH-623
             Project: Commons Math
          Issue Type: Improvement
    Affects Versions: 3.0
            Reporter: Arne Plöse
            Priority: Minor


For instance the add(double[] v) fist clones the array, and then adds all entries of this.data
to the result.
JAMA uses the following approach create a empty result[] the assign the sum of each entry
to the result. this is approximately 10 -20 % faster.
I will provide a patch with some more enhancements/cleanups for this.

in the test look for XXX: 
the first number is the jama time the second the current algorithm.

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