Hi! I'm the developer of nvui. You were definitely right about the readme bloat. I've removed the GIFs in favor of videos uploaded to Github and links to them, although the GIFs may be stuck in the history.
12 karma · joined August 30, 2021
:NvuiCursorAnimationDuration 0.1
That'll reduce the duration to 0.1 seconds. The animation also runs at a specified frametime in ms (divide 1000 by FPS), default frametime is 10ms (so 100FPS). You can modify this using
:NvuiCursorFrametime 5, for example, for a 5ms frametime (200FPS).
Also about the dithering, I'm aware that the GIFs look horrible, but that was not how they looked when I recorded them, I don't know if it was Github's compression but they look a lot worse when uploaded.