Re: speed of octave

[frank wang]

My problem with the speed is that I tried to convert my current
project into octave a few month ago and it works. The only problem is
it becomes very slow, so I could not convince a bunch of matlab
co-worker to use octave. I tried this example just to see whether
there any improvement during the time.

For your information, I have tried the similar cone in Python and
Python is about 4 time slower than matlab.

>From my opinion, octave lacking an usefull debugger and the speed
issue really prevent companies to use this nice software for any big
project.

Thanks

Frank

On 9/7/07, John W. Eaton <address@hidden> wrote:
> On  7-Sep-2007, Don Roberts wrote:
>
> | I also ran into an order of magnitude speed difference between
> | Matlab and Octave on a section of >vectorized< (Matlab-style rather
> | than for-loop style code), but don't think it speaks badly of
> | Octave.  The issue does appear to be Matlab's just-in-time
> | >compiler<.  It's been several months and I don't have the exact
> | code handy, but it was an element-wise comparison of two vectors
> | followed by a reduction.  Unfortunately, it's not an
> | apples-to-apples comparison.  Matlab (7.04) was running under XP on
> | a 2.x GHz Pentium and Octave (2.1.73) under Linux under a 2.4 GHz
> | PowerPC.  Re-writing the function as linked-in C gave negligible
> | speed-up for Matlab, but the expected 10X speed-up for Octave.
>
> If you were able to do this, then how about contributing the code so
> everyone can benefit from the improvement?
>
> jwe
>