Optimization reminder for all of you.
Blendshapes take a significant amount of time to compulte so make sure to not have them on high vertices meshes.
They get computet on any value >0 so all of your 100% boob sliders and arm shrinkers suck up my FPS. Don't do that.

In the attached table you can see e.g. Nefer&Negev performing 40&66% worse with everything merged or Imeris gains 265% by just disabling blendshapes.

tldr: DON'T MERGE YOUR FACE TO YOUR BODY
tldr 2: DON'T HAVE USELESS BLENDSHAPES ON YOUR BODY