Re: 0.56-1 mouse movement causes audio glitching?

(Bringing it back to the list.)

There has been a performance regression in Pd 0.56-test1 that sounds 
very similar to yours: 
https://github.com/pure-data/pure-data/issues/2654. However, that one 
has been resolved since the final 0.56 release. (I've just tested to 
make sure.)

> If I create a new empty GOP, and put 4 of these buttons in it, and 
> duplicate that GOP 32 times, I start getting glitches when mousing 
> around.
I just made a patch with 64 GOP subpatches, each containing 4 instances 
of your abstraction. Then I tried to quickly move the mouse over the 
canvas. Here are my results:

Pd 0.56-1: [iemlib/dsp~] reports an average load of 7-10% and occasional 
peak loads of up to 28%.

Pd 0.55-2: [iemlib/dsp~] reports an average load of 0.5-1% and 
occasional peaks of up to 3%.

In both cases, the average idle load (with DSP turned on) is 0.5-1%.

(Tested on a Windows 10 laptop with an AMD Ryzen 7 PRO 5850U.)

So there is indeed a noticable performance regression! Please open a 
ticket on GitHub!

Christof

On 11.09.2025 00:56, Brady Sharp wrote:
> So yes, I've got LOTS of GOP's, and GOP's within GOP's, probably up to 
> 3 layers deep in some places.
> I've eliminated the input streaming factor and just added a [osc~ 440] 
> going direct to [dac~] within the patch.
>
> In PD-0.56-1:
> Running iem/dsp~, it shows a 38%-ish CPU load, and a 35%-ish Mean CPU 
> Load when idle.
> As I mouse over the canvas, it goes crazy, like 190% Peak, 85% Mean, 
> adn audio glitches, until I stop moving the mouse, or move off the canvas.
> But the oddest part is, I can freely drag around these multi-layer 
> GOP's, and there are no audio glitches and the DSP metering stays the 
> same.
> It's only when moving the mouse without dragging anything that it has 
> the issue.
>
> In PD-0.55-1:
> DSP peaks around 40%-ish, with a mean of about 36%-ish, no matter what 
> I do with the mouse.  Audio stays consistent.
>
> Going back to PD-0.56-1:
> I put in the [osc~ 440] into the [dac~] again, and just started 
> deleting swaths of my GOP abstractions.
> Picture these as modular guitar effects.  Lets say I loosely have 
> about 32 of them (with vastly different DSP requirements, but I really 
> don't think that's the issue). These are GOP's within GOP's, mostly 2 
> levels deep for the most part.
> I have to reduce them to about 6 before I stop getting dropouts while 
> moving the mouse.
>
> After starting from scratch with a new patch with just an 
> [osc~]->[dac~], I think I've found an abstraction that triggers it.  
> It's basically a Midi Assign button.  It IS a very small GOP 
> abstraction, and of course I've got probably 120 of them in my 
> performance patch.  Basically [asnbtn 5] creates a button labelled 
> "5." on the GOP,  that can be used to assign a midi command to an 
> effect parameter.  There really isn't much to it.  there is no audio 
> DSP on it at all, just message routing.  If I create a new empty GOP, 
> and put 4 of these buttons in it, and duplicate that GOP 32 times, I 
> start getting glitches when mousing around.
>
> Again, ONLY in pd-0.56-1.
>
> Abstraction is attached for reference.
>
> If this is appropriate to post to the github, I'm happy to, I'm just 
> making sure it's nothing exclusive to my PC.
> I'm happy for more testing suggestions if there are any.
>
> Thanks,
>
> Brady
>
>
> On Wed, Sep 10, 2025 at 2:27 PM Christof Ressi 
> <[email protected]> wrote:
>
>     Hi,
>
>>     Only starting in 0.56-1, whenever I move my mouse cursor, I'm
>>     getting audio glitching that corresponds to the mouse movement as
>>     it moves across the PD Canvas.
>     Does it only happen if the canvas contains many objects or many
>     GOPs? Or does it also happen with an empty canvas?
>
>     What's the CPU usage of the "pd" process and the "wish" process
>     when you're moving the mouse?
>
>     Christof
>
>     On 10.09.2025 19:29, Brady Sharp wrote:
>>     Hi Folks,
>>
>>     Only starting in 0.56-1, whenever I move my mouse cursor, I'm
>>     getting audio glitching that corresponds to the mouse movement as
>>     it moves across the PD Canvas.
>>     Ironically, this is just when hovering the mouse over the canvas
>>     and moving it.  If I pick up a GOP subpatch and drag it, the
>>     audio glitching goes away! If I move the mouse outside of the PD
>>     Canvas, it also goes away.
>>     I'm running on an old Core 2 duo 6300 laptop (8gb RAM) with a
>>     reasonably complicated patch (takes about 10 seconds to load),
>>     but adding any other apps in the background doesn't seem to
>>     affect it in any way.
>>     Increasing audio delay or audio block size settings has no effect
>>     either.  PD's DPS block size always stays at 64.  I tried
>>     recreating the preferences file as well.
>>     Ruled out a USB Mouse and a USB Hub and all MIDI devices as
>>     well.  Those don't seem to matter.
>>
>>     Running latest Manjaro with XFCE desktop (X11) with pd 0.56-1,
>>     and using Pipewire (JACK)
>>
>>     0.55-1 still works great and has none of these symptoms under the
>>     same conditions.
>>     Both versions are compiled, ie. not using the pd packaged with
>>     Manjaro.
>>
>>     Because of the behavior above, it leads me to think something has
>>     changed with either PD or TCL...
>>
>>     Any thoughts?
>>
>>     Thanks in advance!
>>
>>
>>     -- 
>>     Brady Sharp
>>     [email protected]
>>     bradysharp.com <http://bradysharp.com>
>>
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> -- 
> Brady Sharp
> [email protected]
> bradysharp.com <http://bradysharp.com>

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