If your Davinci Resolve became very slow after upgrading to version 19, here the solution for it under 1 minute. It was very frustrating for me until I have figured out what is the problem. Enjoy the new amazing speed of Davinci Resolve 19. Editing Kohya GUI Ultimate FLUX LoRA training tutorial at the moment.
...
https://www.youtube.com/watch?v=-WnHqhb6ys8