100% CPU when deleting layers

[cgidesign]

One last test idea from my side:

Go into Krita settings → configure Krita
Disable Canvas Graphics Acceleration

Close and restart Krita
Make a new document with the properties shown below

Ad a few layers and paint random content

Then delete a layer, do an undo etc.
On my notebook (a faster one with 10th gen intel cpu) it takes maybe a 10th of a second to delete a layer.

And one more suggestion:
We don’t know what the state of your Krita is (plugins, brush bundles, custom settings etc.). Before testing you might like to reset your Krita to its default state (like it was when you installed it).

Tutorial for this is here:

How to reset Krita to its default state

Sometimes users want to reset their Krita to a state like it was when they installed it. No custom brushes, no custom shortcuts, no custom plugins, no custom UI, etc. Often they assume reinstalling would do this. But this is not the case. Reinstalling Krita will take over all the custom settings made before the reinstall. Here is one way to get back to a clean default Krita on Windows (example on Windows 11 but works similar for Windows 10). Please note, you need to handle files in a directory…