Comment 7 for bug 2004145

I did some testing in DigitalOcean's nyc3 region. I did see a difference in performance between 18.04 and 20.04, though not as large as the reporter, with 20.04 being 30-50% slower than 18.04. Experimenting with different combinations I found that if the iperf3 receiver is on a host running the 5.15.0-69-generic kernel I see lower throughput, regardless of whether the sender is running 5.15.0-69-generic or 4.15.0-208-generic. This also holds true if I install 5.15.0-69-generic in 18.04. So it seems the regression is in receive throughput.