Re: Octave very slow on Cygwin

[Paul Laub]

Reiner, 

As John Eaton said in another response to your question, the problem
is with the setjmp / longjmp exception handling of cygwin gcc version
3.3 and more recent. One workaround is to build Octave using cygwin
gcc 3.2. That's what I did and it solved the slowness problem. Finding
gcc 3.2, however, is more of a challenge. The official cygwin site
does not offer it (last I checked). However, there is another site
where you can get it. See this posting --

http://www.octave.org/mailing-lists/help-octave/2004/2419

The site is 

http://ptolemy.eecs.berkeley.edu/ptolemyII/ptII3.0/cygwin.htm

It's worth the hassle of recreating the cygwin environment with gcc
3.2 and then building Octave from the sources.

Paul Laub 


On Wed, 16 Mar 2005 22:22:01 +0100, Reiner Suikat <address@hidden> wrote:
> Hello everybody,
> I have just installed octave-2.1.67 and the current octave-forge froms
> source on a fresh Cygwin installation running on a Windows XP-2 system. I
> did this because I wanted some of the more recent functions compared to the
> old 2.1.50 windows binaries available on Sourceforge.
> Now to my surprise I find that the old 2.1.50 windows binary is much faster
> than the new installation, at least by a factor of 3-5, on anything having a
> lot of loops in it.
> Does anyone have an explanation for this or know how I can get faster code
> in Cygwin?
> 
> Greetings
> Reiner
> 
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-------------------------------------------------------------
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
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