Ponko Learns how to Improve the Framerate when Animating in Blender WiP (Patreon)

Ok 

Step 1: Click your model's body, in object mode, and hit the tiny wrench button in the properties tab. Disable the subsurf modifier in viewport, but not in render.

Step 2: Switch all views to solid mode (so everyone is a hideous grey blob).

Step 3: Now make every other actor and every scene prop except the character you are animating invisible in the viewport.

Geez. I thought switching to solid mode would be the limit of how primitive I can make the models, but each one of them takes  up a bunch of processing power apparently. I wonder if the next step is to make the model invisible and just animate the rig bones lol