Re: [glob2-devel] Nicowar changed to gradients, requesting tips on update algorithm

[Bradley Arsenault]

On 1/31/06, Stéphane Magnenat <address@hidden> wrote:
> >>From what I know about CPU's, although my knowledge is not extensive,
> > CPU's work fastest with integers of their word size, meaning a 32 bit
> > gradient would be fastest for most cpus, and a 64 bit gradient would
> > be best on newer 64 bit cpu's, but only insane people use 64/32 bit
> > gradients. The speed operated by 8 or 16 bit gradients on conventional
> > cpus would not be very different.
>
> Well, that is correct for 8/16 bits old CPU and 32 bits pure RISC ones
> (such as PPC or Sparc). With recent CPU, that is not the case any more,
> because the memory bandwidth is the limit and the cache hide the rest.
>
> Steph
>
>
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Memory bandwidth is certainly getting much better, like with the hyper
transport 2000 mghz athalons that came out a year or two ago. I could
see the problem deminishing soon.