Hi Thomas,
here is what I found on my P4, 1.8GHz, Win2k:
Pd out of the box: DSP OFF: 10.1 % noise~: 10.7 % zeroes: 72.1 %
Pd compiled with Intel C++ compiler and optimizations for P4 turned on (/O3 /G7 /QaxW): DSP OFF: 6.8 % noise~: 8.1 % zeroes: 7.9 %
Note: the rather hight values with DSP turned off are caused by the asio support!
It seems the Intel compiler somehow fixes this problem. You can get Pd compiled with this compiler from http://www.akustische-kunst.org/puredata/experimental/
BTW, I still think that CPU usage is too high. Some patches using 25% in a 400MHz P2 use 20% on the 1.8GHz P4. This is not really what I expected...
Olaf
Thomas Musil schrieb:
Hi list,
Please try this benchmark-patch with 6 "hip~" Filters on a P4 (attached: test-hip~.pd). I ran this patch under w2k with a Pentium 4 / 2Ghz.
results: with white noise input, 6 hip~ take 0.1 % with zero-signal they eat about 31 % (denormalization of P4).
Question: could somebody try this patch under win_XP and/or under Linux and report his experience ?
my workaround was: adding a -200 dB noise to each filter.
i found some hints under:
http://music.calarts.edu/~majordom/music-dsp/2001-may/msg00470.html
Thomas Musil
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