libev vs libevent

libev is a high-performance event loop/event model library written in C. It allows asynchronous events and callbacks to be registered and handled efficiently in applications. libev supports various event notification interfaces like timers, signals, sockets, pipes, and more.

libevent is an event notification library for developing high performance network servers. It provides APIs for event scheduling that allow callbacks when I/O events occur or after a time delay.