I actually thought Tokamak-particles would be faster too, but judging from some quick speed tests they aren't much faster than a regular rigidbody.
So throwing 2000 particles into the simulation brings the simulation to it's knees and I think a particlesystem should be able to handle alot more particles than that.
So throwing 2000 particles into the simulation brings the simulation to it's knees and I think a particlesystem should be able to handle alot more particles than that.