libevent and epoll,which is more efficient? [closed]

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I think these are the two eve开发者_如何学JAVAnt-dealing libraries among the best.

These two both have many users,but which is better?

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epoll is offered by Linux. libevent is built on top of epoll. Using epoll alone may thus be more efficient, if you know what you're doing.

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As mentioned by blais, libevent uses epoll internally. Libev (http://software.schmorp.de/pkg/libev.html) is also a good choice (I feel it is better than libevent, but that is just me). As for me, I've used epoll directly in some projects and libev in other projects. I like libev because it also provides timers, signals, periodic timers (cron-like), and stat watchers.

So, which is better? If you want to watch a few socket descriptors then epoll is probably all you need. If you are writing a multi-threaded application then libevent/libev would probably be a better way to go. I don't think you'll see an appreciable speed difference between epoll and libevent/libev.