Feature request: Measure latency with netperf TCP_RR instead of ping.

[ipochi]

Measuring the latency with ping might be less reliable than netperf and it produces different results.
Also, applications more commonly use TCP and not ICMP packets.

We can use the netperf option TCP_RR (RR=request-response).

The following article says "Generally, we recommend using netperf over ping for latency tests":

https://cloud.google.com/blog/products/networking/using-netperf-and-ping-to-measure-network-latency