After barely having the program open for a minute, my PNG model begins to lag behind when I'm actually speaking. I don't know what causes this. I've played around with the settings attempting to fix it, run in admin mode, everything, and PNGtuber Plus itself is not pulling a lot of CPU power.

I'm having a similar issue. Additionally, when this is going on, it introduces some noise/static to my audio. This immediately stops after closing PNGtuber Plus. It isn't an immediate issue, but seems to creep in eventually.

Pngtuberplus is pretty inefficient with memory usage. That could be why. I have a high resolution png model that, when loaded, uses about 7-8GB of memory.

I pulled the github repo last night and dug into it, and there's definitely a lot of caching going on that is unnecessary. Was able to cut the memory usage significantly playing around.

(Though to be entirely fair, the software full on doesn't claim to be efficient there. The memory usage is only going to become starkly clear if you've got dozens of high resolution pngs. And if you do like what I do when making these, and export all your layers to be the same image size (so that when you import your image files you don't need to move anything), all that empty space that doesn't show up in the file size of a compressed png matters in video memory texture size.)

That's a shame! I don't even think my images are that HIGH RESOLUTION, but I guess thats the price when it comes to making multiple costumes. Hopefully that caching issue is fixed with another update.

Weird, I used to use it almost every stream without issue.  My model was pretty basic, though.  I did find that if I left it open overnight, it would usually be locked up the next day and I'd have to kill it and re-open it lol.