No, there is no need to “sleep” for 1 ms. The driver is very good at managing resources between graphics and compute. When I’m running my sims calling ~5 ms kernels constantly the display still updates with virtually no lag. If I start doing something that requires a lot of graphical updates, like dragging a window around the simulation slows to ~50% performance but everything is still running fine.
It is only extremely long kernel calls that start to create visual lag problems on the display.
My sims mostly run on a headless box anyway. The system with the display is just for development.