Hi Markus, list,

On 29/03/15 16:08, mr. markuese wrote:

what is the best way to measure needed cpu cycles or MIPS of complex PD-objects like convolve~ oder earplug~? Surely its possible to calculate this from the source code too - for every hint I’ll be glad.

You can't determine CPU cycles without measuring in the real world - lots of issues out of the control of the source code and compiler might affect timing (eg: cache stalls due to OS-controlled switching between cores on a multiprocessor system).

Pd has a load meter patch accessible from the menu, but that measures all of Pd, rahter than specific objects.

I knocked together the attached external, rough usage guide:

  [unmeausred]
    |    |  \

[cputime~] |
| | |
| [measured] [???]] | | | / [cputime~] | / | | | / | [unmeasured] | | CPU time taken by [measured] (in ms, semi-arbitrary maximum 1 minute per block)

[???] might be included in the time, maybe not (depends on the weather)

• you really need to read and understand the order of execution section

of the html manual to make use of this [cputime~] properly.

See the help patch for a more in-depth example measuring multiple things.

Consider it under the same license as Pd.

Claude

http://mathr.co.uk