[PD] 0.43+ gui performance problem

Yury Bulka yurkobb at gmail.com
Sun Oct 16 18:36:46 CEST 2011

Thank you for your reply,

Mathieu Bouchard <matju at artengine.ca> writes:

> How much CPU does Pd (both halves of it) really use while it's acting
> slow ? That could be a big hint either way. In the process list («ps»
> or «top»), see whether «pd» has a big %, and see whether «pd-gui» has
> a big %.
I did the following experiment:
 - opened 'top' in a terminal
 - opened pd and created new file
 ...the CPU is mostly idle
 - with dsp turned off I tried to add one object (a non-existing [test]
   one) and move it around
 ...when I move the object (the window is already updating slowly, around 2 fps), the
Xorg process raises to about 70% CPU usage and puredata process remains
at 2-5%. The command «ps -A | egrep -i 'pd|puredata'» gives the

   17 ?        00:00:13 kswapd0
  783 ?        00:00:00 pppd
 1045 ?        00:08:51 mpd
26605 pts/4    00:00:01 puredata
26608 pts/4    00:00:00 pd-watchdog

(I was running it with JACK, but running through ALSA gives the same
results with only additional puredata process).

The same situation with Pd-extended (except the process name:).

I will post my Xorg.log as an attachment...

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