Re: Very slow filter.cc

[David Bateman]

Miroslaw Kwasniak wrote:

> On Mon, Jan 24, 2005 at 10:34:12AM +0100, Michael Creel wrote:
>  
>
> > By any chances, can the differences be due to changes in random number 
> > generators? Can you repeat this loading given data from a file?
> > Michael.
> >    
>
> You can see that only filter time  was reported ;)
>  
>
> > t = cputime;
> > y = filter(b,1,x);
> > cputime - t
> >    
>
> To be sure I repeated with loading data from file
>
> OCTAVE_VERSION = 2.1.63
> ans = 14.030
> OCTAVE_VERSION = 2.1.64
> ans = 4.0900
>
>  

If as you say it is a fresh CVS, then John's changes to make a, b and x 
const and not use the "MArray<T>::operator ()" which calls make_unique 
for y and si are the reason for the speed up.

Regards
David

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David Bateman                                address@hidden
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