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https://issues.apache.org/jira/browse/MATH-952?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Neidhart resolved MATH-952.
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Resolution: Not A Problem
Not really a problem. Array2DRowRealMatrix should only be used for small
(64x64) matrices, thus the benefit of System.arraycopy is not as big as first
imagined.
> Array2DRowMatrix#copySubMatrix could be improved for performance
> ----------------------------------------------------------------
>
> Key: MATH-952
> URL: https://issues.apache.org/jira/browse/MATH-952
> Project: Commons Math
> Issue Type: Improvement
> Reporter: Thomas Neidhart
> Priority: Minor
>
> Currently, the 2 copySubMatrix methods are inherited from AbstractRealMatrix
> where the copy is done element by element. In the case of an Array2DRowMatrix
> this can be significantly improved by using System.arraycopy similar as the
> setSubMatrix method already does.
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