Re: octave-speed

[Paul Kienzle]

Performance for vector operations is on par with matlab.  Performance 
for loops takes a 10x hit.
You can develop the algorithm in Octave and code the bits that require 
loops in C++.

Look through the list archives for links to work on an octave compiler.

- Paul


On Feb 4, 2005, at 9:34 AM, Rafael Rodríguez Velilla wrote:

> Hello all,
>
>   I'm new to octave and I'm planning to use it to simulate DSP 
> algorithms.
>
>   Speed is a matter of concern in my simulations. I have made a stupid 
> test to compare octave's performance with Matlab's performance:
>
> m=1:100000;
> n=8;
> for i=1:99999
>   n=sqrt(sqrt(m(i)*m(i+1))*n);
> endfor
> n
>
> In the same computer it takes 10 seconds to run under linux-octave but 
> less than a second under Matlab.
>
> I have compiled octave 2.1.64 with shared libraries with gcc3.2...
> ... is there a way to improve its performance?
> For example by compiling it with CPPFLAGS=-march=i686???
>
> I have read that maybe using ATLAS improves the performance.
>
> Any hints on how to compile it to run faster?
>
>
>
> -------------------------------------------------------------
> Octave is freely available under the terms of the GNU GPL.
>
> Octave's home on the web:  http://www.octave.org
> How to fund new projects:  http://www.octave.org/funding.html
> Subscription information:  http://www.octave.org/archive.html
> -------------------------------------------------------------



-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------