[PD] readanysf~ CPU load

Maurizio Umberto Puxeddu mauriziopuxeddu at yahoo.it
Thu May 15 17:01:57 CEST 2003


Probably it has nothing to do with this object.
I think there are some dark sides of Pure Data CPU usage.

When I measured those numbers I had my current main patch loaded.
In that situation I'm pretty sure that starting/stopping readanysf~ on a
mp3 made a 40% different in the CPU load.

I shut down PD, loaded only the readanysf~ patch started a ogg and got a
normal CPU usage (<5%).

I launched it again with my main patch loaded and starting readanysf~
causes a stable 45-50% of CPU usage *increase* (in fact my patch
components were almost all [switch~]ed off so the CPU usage was nearly 0
without readanysf~ anyway).

In past I noticed also other strange behaviours of PD (like its CPU
usage not getting down when turning off relevant section of the synth)
but this beats them all.

Is there something more about PD that I need to know?

Thanks,

Maurizio Umberto Puxeddu.

On Thu, 2003-05-15 at 14:03, Frank Barknecht wrote:

> > > On my P3 800 playing an mp3 or ogg takes ~40% CPU.
> > > Alsaplayer is about ~5% on the same machine.
> > 
> > strange.  on my p3 600 mhz machine, an mp3 or ogg takes only 1-5% 
> > 
> > did you compile libmad and ogg with nasm support?
> 
> I also have normal cpu-load, even less than with alsaplayer...
> ciao






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