If I’m understanding the computations involved correctly, it’s probably a question of microseconds before the solution is found. The solving algorithm they teach humans is really very simple if you can effortlessly remember all the color-positions at once, and maybe they’ve got something even more direct for computers.
My guess is that the limiting factor here is not the calculation, or even the robot cube-twisting devices, but the physical integrity of the cube itself. Pretty soon someone will invent a titanium cube bathed in ultra-low viscosity lubricants and the record will go down to 0.002s or something. (Which will be verified after the fire from the paper stickers igniting is put out.)
