Ok. What you wrote would adapt to select and nonblocking sockets in LuaSocket pretty easily, FWIW. Using epoll / kqueue (directly or via libev/libevent) scales

Ok. What you wrote would adapt to select and nonblocking sockets in LuaSocket pretty easily, FWIW. Using epoll / kqueue (directly or via libev/libevent) scales better, but you're blocking on the sleep, so it wouldn't matter.