[wtallis]

> I gave a counterexample of just how high performance TCP is picking some arbitrary notion of "high performance".

You gave a vacuous example of a measurement of packets going nowhere. When zero work gets done, you might as well call it infinitely fast.

[nh2]

No, the example exercises the full TCP protocol including all its logic.

There have been plenty of examples of protocols where that is far from infinitely fast and does not scale even on localhost, e.g. with OpenVPN or any protocol that requires full acknowledgements from the other side before sending more.