[GRASS-dev] GRASS inefficiency and FFTW

[stefano de paoli]

Hi Glynn,

> > 
> > Is this an example of the fact that Free Software
> is primarly about
> > freedom than about efficiency?
> 
> Yes; hence the term "Free Software" rather than
> "Efficient Software".
> 
> Of course, the two aren't mutually exclusive.


That's exactly what I meant.
So, maybe my conclusion was not necessarily wrong.

I'm safe :-) Maybe I don't have to throw away my
analysis. 

 
> FFTW itself is free software, and it has
> substantially better
> performance than the old NR FFT implementation (or
> just about any
> other implementation in existence, AFAICT). The
> inefficiency is a
> consequence of implementing a "minimal" change
> (preserving the
> existing fft() interface) rather than an "ideal" one
> (modifying the
> callers to use a more appropriate interface).


Someone else in this thread suggested that the minimal
Vs the ideal change might be due to the "development
cost". 
As far as I know you did the change. Was the minimal
change really a choice of development cost or
something else?
 

Stefano




> -- 
> Glynn Clements <glynn at gclements.plus.com>
> 



	

	
		
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