1.1.f [ii] Latency
UDP is faster (lower latency, better use of network pipe) than TCP (with the exception of applications that only confine to small writes). UDP is preferred if you’re transmitting some sort of real time data or just blasting packets over the network that don’t need reliable delivery.
Adam, Paul (2014-07-12). All-in-One CCIE V5 Written Exam Guide (Kindle Locations 1174-1175). . Kindle Edition.