[dlsspy]

It's not obvious to me what that does. Does that only service one of the 100 clients or one of their 10,000 pings each? Or both?

[luikore]

It's one at a time. But, since the server only performs a one-shot task without the "hang on and wait 30 seconds"-like long connections, and, the default socket backlog of TcpServer is > 100, so every client gets served within the delay of (0~99)*6ms.

In short, every round is fully served, and the concurrency level is 100.