As per my comment further up, it might be interesting to spin up a handful of listening processes (eg: 127.0.0.1 through 127.0.0.10), and a handful of clients; and have the clients pick one at random, or something like that. Not so much for &quot;real world testing&quot;, but just as an exercise to see if one can press the system to other limits than open connections&#x2F;address pairs?