I honestly don't know the cause, and haven't really checked on numbers. I mostly work on my four year old laptop, and test by running patches I know (solitude is a good test of heavy CPU usage, it won't run on a machine less than 1.6GHz, from my experience).
As for drawing operations like anti-aliasing, those would not show up in the 'pd' process, but rather the 'pd-gui' process, since that's the Tk part.
Are you seeing the CPU increase in the 'pd' process? How are you measuring this?
.hc
On May 4, 2012, at 9:31 AM, katja wrote:
Hello,
I've installed Pd-extended 0.43 versions (Linux and OSX) from the autobuilds several times in the past year. The latest builds seem to work fine in many aspects, but they are still so CPU-hungry: ~ 50% more than Pd-extended 0.42. How come?
A while ago, the new PortAudio version was blamed (http://www.mail-archive.com/pd-list@iem.at/msg50357.html). Indeed, using Jack solves the load difference for OSX.
But on Debian I also observe a 50% load increase for the new Pd-extended. No matter if ALSA or Jack is used. Does anyone have similar observations with Linux builds?
BTW, I'm happy with Tk 8.5's antialiased font! Initially, I feared that antialiasing was responsible for increased load on Debian, but disabling GUI updates did not make noticeable difference. It seems that antialiasing is done rather efficiently, the performance drop must be somewhere else.
Katja
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