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From "Rob Tompkins (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MATH-1390) LUDecomposition slow on larger matrices
Date Tue, 18 Apr 2017 15:49:41 GMT

     [ https://issues.apache.org/jira/browse/MATH-1390?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rob Tompkins updated MATH-1390:
-------------------------------
    Fix Version/s:     (was: 3.7)

> 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
>
>   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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