Lag

[Harry-Potter66]

Hey I started using RNote for doing past papers, and its doing a pretty good job, except after a while there is lag and it takes at least 5 second sfor the ink to start working again, its quite irritating especially when you're solving maths or something similar, as you tend to write fast, and without breaks. I want to know how I can fix this, is this happening because of a large pdf size?

Great app tho, thanks a lot for the service!

[flxzt]

can you please provide all information requested in the bug report template? Thank you.

[Harry-Potter66]

Yes I apologise, i assumed this wont be termed as a bug. Describe the bug
Randomly after a few writings, app appears to lag, and have to wait at least 5-7 seconds before being to enter more writings.

Console Output
I'm not too sure what exactly I should input, I apologise again.

Desktop (please complete the following information):

• OS: Windows 11
• App Version: Rnote v0.10.2
• Installation Source: Installed through .exe file
• Input Source: External Graphics tablet - Huion

Additional context
Lag doesn't immediately start after app is opened and writing is input, it starts about 2-3 mins after writing is started.

I hope this is sufficient.

[Harry-Potter66]

Just an update, this is occuring for normal documents as well, as in ones with blank pages, and I wrote on them.

[Doublonmousse]

Can I ask what hardware you're running rnote on ? I've noticed rnote pen input can sometimes lag when using it after waking a windows device from sleep.

Also lag is much more noticeable on device with a cpu that's more limited as rnote is not currently fully gpu accelerated (so there is some cpu usage, maybe showing cpu usage would be useful to debug this).

[Kimiblock]

I'm also experiencing this on Arch Linux, Intel Alder Lake graphics.

GTK 4.15, GSK_RENDERER={gl,ngl,vulkan} does not affect the laggy situation.

When scrolling with touchpad in a new document, it barely reaches 50 frames per second: