More cause that could lag Krita at O.S. level, from the top of my head:
- using Wayland
- using the packaged version, especially on rolling package system (eg. Arch, Krita require on Linux a patched Qt; the one bundled on *.appimage is optimised. Arch by delivering the latest Qt 1h after release often add more bugs to packaged Krita by distro maintainers)
- Using Snap/Flatpack: rarely well packaged and generated by script without testing. Not sure how the Qt version and environement is tuned for optimal Krita. Here again, as dev said on the blog, only the appimage is adviced for Linux users.
- Running the free/libre driver for Nvidia
- The optimus/bumbleebee system is also problematic.
It’s a real slalom 