I am looking for a C++ networking library that emphasizes minimum latency at the expense of all else. I like the design of ZeroMQ, but I'm concerned that it doesn't provide an unreliable transport, just TCP and PGM. I don't need reliability so much as minimum time overhead. Preferably, I would like a library that can do cool tricks like FEC codes or packet duplication to reduce the drop rate without waiting for any retransmissions.
It's possible the TCP overhead won't be a problem after the initial connection delay. I don't have the ability to test-and-measure just yet to find out.