I think that limitation would become a major bottleneck long before you reach Dyson sphere size. Internode communication is already the major bottleneck for mod

I think that limitation would become a major bottleneck long before you reach Dyson sphere size. Internode communication is already the major bottleneck for modern supercomputers, which limits the possibly achievable computational speed for every problem except for strictly parallellizable problems that do not require such internode communication.