>"A single 24port switch with 1Gbps ports would see 48Gbps so with 64byte packets would see 71M packets, 1518byte packets would drop to 3.9M packets."

This is not correct. An interface doesn't handle more packets per second with smaller packet sizes it handles less, much less. Getting the full 48 Gbps of 24 ports at line rate would only be possible if the packets were full size packets(1500 bytes). The PPS bottleneck with small packets(64 bytes) would mean you would never see line rate on those 24 interfaces as your throughput would fall off a cliff. Network hardware vendors quote PPS using the lower bound of packet size and line rate at full packet size. The PPS bottleneck on a network device is incurred long before the line rate limit is ever reached.