How can I measure the performance and TCP RTT of my server code?

Question

I created a basic TCP server that reads incoming binary data in protocol buffer format, and writes a binary msg as response. I would like to benchmark the the roundtrip time

Answer 1

As a very simple highlevel tool netcat comes to mind ... so something like time (nc hostname 1234 < input.binary | head -c 100) assuming the response is 100 bytes long.