Roblox Studio just doesn't run well/isn't optimized for me

In Blender, I can select TONS and tons of objects before I even lose FPS.
In Roblox.


I select this one building, yes it has good amount of parts. And it slows down roblox a TON!
My graphics and quality is at the highest but this doesn’t make a difference I think
I normally run at 140 FPS, when I select a building like this, I drop to 27.

Am I doing something wrong? Or is it Roblox? If so, is there a fix?

This is probably due to the selection beta. Go to beta settings to disable the beta.

Doesn’t seem to be that sadly.