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From: | Tatsuro MATSUOKA |
Subject: | [Octave-bug-tracker] [bug #48085] Slow solving simultaneous equations by LU decomposition for octave 4 on windows |
Date: | Sun, 19 Jun 2016 04:07:41 +0000 (UTC) |
User-agent: | Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.84 Safari/537.36 |
Follow-up Comment #11, bug #48085 (project octave): I have built octave-3.8.2 on native windows using the same LAPACK (3.5.0) and openblas (0.2.18) that are used for 4.0.2 and 4.1.0+. And execute Simple left division Elapsed time is 0.0590401 seconds. LU decomposition c=P*B Elapsed time is 0 seconds. y=L\c Elapsed time is 0.002002 seconds. x=U\y Elapsed time is 0.00100088 seconds. Elapsed time for y=L\c and x=U\y on 3.8.2 is faster that those on octave 4 also on windows. Thus this issue is not related to the LAPACK and blas version and seems to be platform independent except for slowness of all left division on 4.1.0+ on windows. I propose that 1. I will make a new file of bug tracker for slowness all left division on 4.1.0+ on windows and 2. this tracker are kept for slow left division by triangular matrix on octave 4 (platform independent.) The titles proposed are 1. Slowness of left division on 4.1.0+ on windows 2. Slowness of left division by triangular matrix on octave ver. 4 respectively. I hope that someone improve the title because my English is poor. _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?48085> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/
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