They would have to be very small. The speed of light doesn't change, just because they are thinking faster. But if they are small, they are far more limited in

They would have to be very small. The speed of light doesn't change, just because they are thinking faster. But if they are small, they are far more limited in how complex they can be, then they have fewer atoms to work with. If they are small, then they have issues seeing light, which needs a certain size detector. And you can't just increase the frequency of light (to get smaller photons), because higher frequency light ionizes atoms and damages chemical bonds (or does right through). > exotic thrusters The speed of thermal conduction in a material isn't any faster either. So again, you would need something very small.