This can be toggled by some special key combination. It completely disables rendering even tho there is still a window. This will increase FPS and make simulations faster. If we need to wait for something we wait less
You could turn off the "Basic rendering" thingy in the renderer options... But honestly I don't think that would increase simulation time itself. Each tick has a set amount of minimum time to be displayed, so even if you had a super-powerful computer everything wouldn't just be a blur.
The devs would need to introduce an "Incubation" mode, to increase tick speed... Or someone could maybe make a mod or script for it.