Earlier quoted context omitted.
I wonder if he was running a database driven site off of his Pi? It wouldn't take many queries per second to kill off something running on a SD card. A static site would probably be able to saturate the Ethernet before the Pi gave up. Even old Pentiums could saturate Fast Ethernet, although the Pi is penalized because the Ethernet runs off of USB so its extra processor intensive. Edit: is blog is back up. It apparent…
I don’t disagree, but I think the PRi 4 no longer suffers from the USB-Ethernet bottleneck (never pushed my 3 and 4 hard enough to notice, to be honest).
Even if it isn't the bottleneck, running the Ethernet over USB means the CPU has to get involved to do all of the Bus Mastering, which cuts into cycles it could be spending on preparing the packets.