[PD] Variable CPU?

[Thibault Walter]

Hello

I made a little discovery.

It works with pd-extended and with pd-vanilla+GEM. Il have a MacBook Pro
2.66 GHz Intel Core 2 duo, with Mac-OS X 10.5.8.

When I open one of my video-patch (it works with any one of my video or
sound patchs), if I look at the CPU utilisation, I get something like 7 ou
8. Nothing is running, the GEM window is not even created.

If I wait something like 1 or 2 hours without using pd ; or, if I pause my
computer (I close it), wait 30 seconds, and open it, I get something like 0
or 1 as my CPU.

Then, if I use my patch, when I get normally CPU = 70, and with this method
I get CPU = 20. And of course, the performances are absolutely not the same.

In fact, without this method, my MacBook Pro is not very much more powerful
than my old 1.33GHz PowerPC G4.


It works with audio-patchs too.

There is an other method : if I turn dsp on, and then off, I get the same
result. This method can't work with audio-patchs, because when I turn on dsp
I always get high CPU. So I have to turn dsp on before pausing and turning
on my computer. (I don't know if I'm clear...)


Weeell, I realized that it works with my PPC too, but the differences are
not so important.

Has someone any explanation?

excuse me for my english

T