SUMMARY STEPS TO REPRODUCE 1. Zoom 2. Paint with a brush 3. OBSERVED RESULT The brush doe not move over the canvas smoothly, it kind of jumps and delays EXPECTED RESULT Painting will be done through smooth brush movement SOFTWARE/OS VERSIONS Windows: 10 X64 macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
Check https://docs.krita.org/en/KritaFAQ.html#krita-is-slow please, to see whether there's something you can do to fix your system. Since you are not giving any information whatsoever, we cannot help you further.