Yeah, loved doing that exact same thing too :-) Turtling was incredibly fascinating in SC for some reason. Especially once you built the Tier 4 infinite power generator from one of the races.

And yes, I tried it couple years ago and unfortunately I don't think it's that well optimized for multi-core CPUs, the game was massively slowing down for me, but my i7 was at like 50% usage at most.