libev是libevent之后的一个事件驱动的编程框架，其接口和libevent基本类似。据官方介绍，其性能比libevent还要高，bug比libevent还少。-A full-featured and high-performance (see benchmark) event loop that is loosely modelled after libevent, but without its limitations and bugs. It is used in GNU Virtu