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[Octave-bug-tracker] [bug #48085] Slow solving simultaneous equations by

From: Dmitri A. Sergatskov
Subject: [Octave-bug-tracker] [bug #48085] Slow solving simultaneous equations by LU decomposition for octave 4 on windows
Date: Mon, 20 Jun 2016 03:29:05 +0000 (UTC)
User-agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:47.0) Gecko/20100101 Firefox/47.0 
Follow-up Comment #17, bug #48085 (project octave):

I re-run the test on the same computer/same octave binary but
preloading reference blas library:

LD_PRELOAD=/usr/lib64/libblas.so octave-cli

octave:1> lutest_vp2
Simple left division
Elapsed time is 3.4795 seconds.
LU decomposition
c=P*B
Elapsed time is 0.0395591 seconds.
y=L\c
Elapsed time is 14.4594 seconds.
x=U\y
Elapsed time is 15.1527 seconds.

So it looks like your octave 4.1.0 uses reference blas rather than
openblas...

Dmitri.
-- 


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