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From "Christoph Dibak (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MATH-1389) Runtime Improvement for getSubMatrix in Array2DRowRealMatrix
Date Wed, 05 Oct 2016 13:15:21 GMT

     [ https://issues.apache.org/jira/browse/MATH-1389?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Christoph Dibak updated MATH-1389:
----------------------------------
    Attachment: 0001-faster-getSubMatrix-for-Array2DRowRealMatrix.patch

> Runtime Improvement for getSubMatrix in Array2DRowRealMatrix
> ------------------------------------------------------------
>
>                 Key: MATH-1389
>                 URL: https://issues.apache.org/jira/browse/MATH-1389
>             Project: Commons Math
>          Issue Type: Improvement
>            Reporter: Christoph Dibak
>            Priority: Trivial
>         Attachments: 0001-faster-getSubMatrix-for-Array2DRowRealMatrix.patch
>
>   Original Estimate: 0.3h
>  Remaining Estimate: 0.3h
>
> Using System.arraycopy() for creating sub-matrices in the getSubMatrix() method of Array2DRowRealMatrix
improves the runtime.  Tested for a matrix with dimension 50x50, the execution was 16 times
faster.



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