Re: 2.9.4 speed

[David Bateman]

Shai Ayal wrote:

> Hi all,
>
> With all your help I was able to install 2.9.4, using Quentin's SRPMS for
> ufsparse and glpk and applying a patch to the makefile as detailed in a
> previous email to the list by Ismail.
>
> I am testing it against 2.1.72. both versions were configured with the 
> same
> options and use the same blas/atlas/fftw and compilers.
>
> I have a some code which constructs a 201^2x201^2 sparse matrix and 
> inverts
> it. While the inversion speed is comparable for both versions, The part
> which constructs the I,J,S vectors which I later turn into the sparse
> matrix by s=sparse(I,J,S) takes almost twice as much time in 2.9.4 (12
> seconds compared to 6 seconds). This part has a lot of loops, vector
> concatenations etc...
>
> Does this sound familiar to anyone, or should I investigate further?
A little bit more break-down in where the slow-up is happening would help...

D.


> Shai
>
>
>
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David Bateman                                address@hidden
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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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