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Re: Octave SLOW
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From: |
udina |
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Subject: |
Re: Octave SLOW |
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Date: |
Tue, 31 Jan 1995 17:26:01 +0100 (MET) |
:~>
:~>Hi,
:~> I am trying Octave 1.1.0, and it seems to be much slower than MATLAB.
:~>I get longer running times on an Alpha with Octave than on a 33MHz
:~>486 PC with Matlab. Any comments?
:~>
Well, at that moment I only can compare matlab 4.0 running in a HP-750
versus octave 1.1.0 running in a HP-735. This second machine is faster
than the first because the clock speed.
I estimate that there is a factor about 2 or 3 (it's a
new machine at home!)
< M A T L A B (tm) > Octave, version 1.1.0.
Version 4.0 ...
...
>> tic; inv(rand(50,50));toc octave:1> tic; inv(rand(50,50));toc
elapsed_time = ans = 0.043408
0.0500
>> tic; inv(rand(100,100));toc octave:2> tic; inv(rand(100,100));toc
elapsed_time = ans = 0.15567
0.2699
>> tic; inv(rand(150,150));toc octave:3> tic; inv(rand(150,150));toc
elapsed_time = ans = 0.45370
0.7833
So it looks like Octave is slower in the overhead part but
not in the numerical part (?) No conclusions from such a primitive and
quick test might be drawn...
Anyway, matlab is in his 4.0 version, and octave in 1.1!!! And it's
free, matlab is horribly expensive for what you get.
BTW: why octave says
warning: tic: ignoring extra arguments
warning: toc: ignoring extra arguments
when I call tic?
Frederic Udina
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