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https://issues.apache.org/jira/browse/MATH-1389?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Emmanuel Bourg resolved MATH-1389.
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Resolution: Fixed
Fix Version/s: 3.7
4.0
I applied the patch on the 4.x and 3.x branches (with a minor optimization for
the instantiation of the sub matrix). Thank you very much Christoph!
> 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
> Fix For: 4.0, 3.7
>
> Attachments: 0001-faster-getSubMatrix-for-Array2DRowRealMatrix.patch,
> MatrixBenchmark.java, RuntimeTestGetSubMatrix.java
>
>
> 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 time was 16 times faster.
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