Libevent is a nice library for handling and dispatching events, as well as doing nonblocking I/O. This is fine, except that it is basically single-threaded -- which means that if you have multiple CPUs or a CPU with hyperthreading, you're really under-utilizing the CPU resources available to your server application because your event pump is running in a single thread and therefore can only use one CPU core at a time.
The solution is to create one libevent event queues (AKA event_base) per active connection, each with its own event pump thread. This project does exactly that, giving you everything you need to write high-performance, multi-threaded, libevent-based socket servers.
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