===== Overview =====

[[http://monkey.org/~provos/libevent/|libevent]] is a cross platform library that abstracts out the different notification APIs (specifically, /dev/poll, kqueue(2), event ports, select(2), poll(2) and epoll(4)).  It also supports triggering events due to timeouts or signals.  


===== Case Studies =====
  * Used by [[memcached]]
  * Used by [[beanstalkd]]
  

===== Gotchas =====
  * Your struct event objects need to remain valid after you've added them, so be careful about putting them on the stack.  
  * According to the [[libev]] developers, timer support in libevent is not as efficient as [[libev]].  See [[http://libev.schmorp.de/bench.html|these benchmarks]], and [[http://search.cpan.org/src/MLEHMANN/EV-3.31/libev/README|this list]] of other differences.

===== Tips & Tricks =====
  * 

===== Alternatives =====
  * [[libev]], [[liboop]]

===== Other Resources ==== 
  * [[http://www.kegel.com/c10k.html|The C10K problem]] - a collection of information about the different models for handling large numbers of connections.
  * [[http://libev.schmorp.de/bench.html|Comparison]] of [[libev]] and libevent