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Posted to issues@commons.apache.org by "Wilhelm Burger (JIRA)" <ji...@apache.org> on 2016/11/26 09:48:58 UTC
[jira] [Commented] (MATH-1390) LUDecomposition slow on larger
matrices
[ https://issues.apache.org/jira/browse/MATH-1390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15697660#comment-15697660 ]
Wilhelm Burger commented on MATH-1390:
--------------------------------------
A proposed fix has been placed here: https://github.com/WilhelmBurger/commons-math/tree/wilbur
--Wilhelm
> LUDecomposition slow on larger matrices
> ---------------------------------------
>
> Key: MATH-1390
> URL: https://issues.apache.org/jira/browse/MATH-1390
> Project: Commons Math
> Issue Type: Improvement
> Affects Versions: 4.0, 3.7
> Reporter: Wilhelm Burger
> Priority: Minor
> Labels: performance
> Fix For: 4.0, 3.7
>
> Original Estimate: 6h
> Remaining Estimate: 6h
>
> Commons-math LUDecomposition runs ca. 10 times slower than the original (referenced) JAMA implementation for a matrix of size 1600 x 1600, slowdown is noticable above size 750 x 750, regardless of matrix type.
> It is suggested to revert to the proven (and fast) JAMA implementation and overhaul the LUDecomposition class (and related classes) in the 'linear' package.
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