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| 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 02:40:14 +0000 (UTC) |
| User-agent: | Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:47.0) Gecko/20100101 Firefox/47.0 |
Follow-up Comment #14, bug #48085 (project octave):
OK. Again I got essentially the same numbers in octave 4.0.2 and 4.1.0:
octave:1> lutest_vp2
Simple left division
Elapsed time is 1.48758 seconds.
LU decomposition
c=P*B
Elapsed time is 0.0369399 seconds.
y=L\c
Elapsed time is 0.62088 seconds.
x=U\y
Elapsed time is 0.619237 seconds.
It really looks like the issue with the openblas library.
Do you use the same library for all your octave binaries?
Dmitri.
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