If you want to keep the easy thread-per-connection model even with 1M connections you might have a look at Erlang - it takes the best of both worlds (threads an

If you want to keep the easy thread-per-connection model even with 1M connections you might have a look at Erlang - it takes the best of both worlds (threads and async IO) via its processes (so you get a process-per-connection). I read somewhere that the overhead of a process is just about 300 bytes.