[PD] pd-gui update rate

Jonathan Wilkes jancsika at yahoo.com
Fri Nov 18 21:16:26 CET 2011

----- Original Message -----
> From: Roman Haefeli <reduzent at gmail.com>
> To: pd-list at iem.at
> Cc: 
> Sent: Friday, November 18, 2011 3:10 PM
> Subject: Re: [PD] pd-gui update rate
> On Fri, 2011-11-18 at 18:53 +0100, András Murányi wrote:
>>  Lame question: Would user-settable GUI refresh rate help with speed
>>  problems or with audio dropouts that some people experience? Or do these
>>  depend on the amount of data transmitted and not on the update frequency?
> I _think_ this depends on the kind of GUI element. If you send thousand
> messages per second to a slider, then it would probably help. But you
> can limit the rate already now, so I personally don't think that a fixed
> refresh rate would urgently be necessary.
> I think arrays can be quite a hog since not only for every pixel you see
> a message from pd to pd-gui was sent, but for every sample. This can be
> quite a lot of messages when you change significant chunks of an array.

You don't even have to change the array-- just displace it in edit mode.  If I 
remember correctly, for every pixel it's displaced pd recalculates the 
relationship between pixels and samples to redraw the array, rather than 
just moving in Tk by tag.  It's ridiculous.


> However, a fixed GUI refresh rate wouldn't help with this.
> Roman
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