[PD] lag when starting sub-process

Tue Nov 12 23:15:23 CET 2019

Probably the first Pd startup takes longer than subsequent ones because
there are other competing startup actions that are eating "disk" bandwidth.

cheers
M

On Tue, Nov 12, 2019 at 08:01:25PM +0100, iftah gabbai wrote:
> thank you both for the answers, i am using the nogui tag since im building
> for a headless rpi, i will try to see if the noprefs makes a difference,  i
> have a script that launches pd when my sound.target is reached on the rpi
> and it takes 4-5 seconds only when booting, if i start the script manually
> its almost instantaneous and no lag is present in linux so it might be
> actually related to something else
> 
> best
> 
> On Tue 12. Nov 2019 at 18:09, Miller Puckette <msp at ucsd.edu> wrote:
> 
> > Pd sometimes seems to take several seconds to start up on MacOs.  It once
> > started up very quickly. I haven't figured out if this is a change in MacOs
> > or in Pd.
> >
> > And yes, the owing Pd instance has to wait for the sub-process to get
> > running,
> > so that will freeze it for a few seconds.
> >
> > It migth help to clear out unneeded "libraries" (start the subprocess with
> > -noprefs and explicitly add the ones you want).  Also it will always speed
> > things up to run the sub-process "-no-gui" whenever you don't need to see
> > it.
> >
> > cheers
> > Miller
> >
> > On Tue, Nov 12, 2019 at 03:52:51PM +0100, Christof Ressi wrote:
> > > <html><head></head><body><div style="font-family: Verdana;font-size:
> > 12.0px;"><div>
> > > <div>if the pd~ subprocess blocks (beyond the specified latency), then
> > the parent process blocks as well, so the behavior you describe is
> > expected. It's simply not possible to spawn pd subprocesses in a
> > realtime safe manner (yet).</div>
> > >
> > > <div> 
> > > <div name="quote" style="margin:10px 5px 5px 10px; padding: 10px 0 10px
> > 10px; border-left:2px solid #C3D9E5; word-wrap: break-word;
> > -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">
> > > <div style="margin:0 0 10px 0;"><b>Gesendet:</b> Dienstag, 12.
> > November 2019 um 15:25 Uhr<br/>
> > > <b>Von:</b> "iftah gabbai" <ift.gab at gmail.com><br/>
> > > <b>An:</b> Pd-List <Pd-list at lists.iem.at><br/>
> > > <b>Betreff:</b> [PD] lag when starting sub-process</div>
> > >
> > > <div name="quoted-content">
> > > <div>hey there, im experiencing a lag in my main patch when i start
> > a pd~ sub process. on my i7 quad core 16gb macbook pro its about 4-5
> > seconds until pd is running again and on an rpi 3 its about the same.
> > is this a known thing? and if so, is there a workaround?
> > > <div> </div>
> > >
> > > <div>best</div>
> > > </div>
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> > >
> > >
> >
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