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[Octave-bug-tracker] [bug #45890] Sparse A*x and A+B are a bit slow


From: Mike Miller
Subject: [Octave-bug-tracker] [bug #45890] Sparse A*x and A+B are a bit slow
Date: Wed, 15 Aug 2018 16:46:44 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0

Follow-up Comment #16, bug #45890 (project octave):

I see the same as you:


----------------------------------------------------------------------
GNU Octave Version: 5.0.0 (hg id: 95eb72d50fb0)
GNU Octave License: GNU General Public License
Operating System: Linux 4.17.0-1-amd64 #1 SMP Debian 4.17.8-1 (2018-07-20)
x86_64
----------------------------------------------------------------------
no packages installed.

N=1000000 NNZ=20000000 NRUNS=5
 sparse: 2.631752 (0.058011)
 2*A   : 0.219845 (0.003500)
 A'    : 2.159551 (0.035017)
 A+B   : 0.625339 (0.017899)
 A*x   : 0.229362 (0.007507)
 A'*x  : 2.390337 (0.034360)


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