The fastest S/370 (pre-S/390) machine in the line was, I think, the 3090; these were multiprocessors, but a single processor had a 69 MhZ clock rate. Even if y

The fastest S/370 (pre-S/390) machine in the line was, I think, the 3090; these were multiprocessors, but a single processor had a 69 MhZ clock rate. Even if you assume it retired one instruction per cycle (and I'm not at all sure it did), it wouldn't be a shock for Hercules on an RPi to manage that.