In addition to what Grum999 said, if Krita is still too laggy for you, i.e. after reducing the Stabilizer to None, Basic or Weighted, there are only a few tiny things you can do to improve it. Mostly cosmetic, but if you like, you can try these Ideas to improve your Kritas performance.
What you could possibly try is to switch between OpenGL and DirectX to see which option responds more smoothly/faster for you, and then use the faster one. Furthermore, before starting Krita, you could close every application that is not absolutely necessary for your Krita session with a click on the “X” and not just minimize it, you should also close programs that reside in the notification area of the taskbar if they are dispensable for painting.
If you want to optimize even more, I would need information for a possible next tip, possibly one could still improve a little something. For this, I would have to question how much free space is left on the SSD? And if you could post a screenshot of your performance settings, the first tab will do. As I said, a possible tip, it may be that everything already fits with you.
Michelist