4 ms·

This is interesting, but I would have thought that gigabit ethernet would have higher latency than 100 megabit, because with spread-spectrum communication, late

This is interesting, but I would have thought that gigabit ethernet would have higher latency than 100 megabit, because with spread-spectrum communication, latency tends to go up as bandwidth goes up. So ethernet must use a more discrete encoding. I started looking up info related to this, but I'd be curious to hear opinions first. I'm having trouble finding what the potential bandwidth for ethernet would be if it went to spread-spectrum, and how much that might increase latency.

CodesInChaos 7y ago
For 512-byte packets transmission over 100Mbit takes ~50us by itself, so the OP's target latency is difficult to reach on 100Mbit, even under ideal circumstances. Though I don't think most of the difference the OP found is caused by the linkspeed difference, but the hardware or driver being better after the swap.