libev is a high-performance event loop/event model with lots of features.
(see benchmark at http://libev.schmorp.de/bench.html)
ABOUT
 Homepage: http://software.schmorp.de/pkg/libev
 Mailinglist: libev@lists.schmorp.de
 http://lists.schmorp.de/cgi-bin/mailman/listinfo/libev
 Library Documentation: http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod
 Libev is modelled (very losely) after libevent and the Event perl
 module, but is faster, scales better and is more correct, and also more
 featureful. And also smaller. Yay.
 Some of the specialties of libev not commonly found elsewhere are:
 
 - extensive and detailed, readable documentation (not doxygen garbage).
 - fully supports fork, can detect fork in various ways and automatically
 re-arms kernel mechanisms that do not support fork.
 - highly optimised select, poll, epoll, kqueue and event ports backends.
 - filesystem object (path) watching (with optional linux inotify support).
 - wallclock-based times (using absolute time, cron-like).
 - relative timers/timeouts (handle time jumps).
 - fast intra-thread communication between multiple
 event loops (with optional fast linux eventfd backend).
 - extremely easy to embed.
 - very small codebase, no bloated library.
 - fully extensible by being able to plug into the event loop,
 integrate other event loops, integrate other event loop users.
 - very little memory use (small watchers, small event loop data).
 - optional C++ interface allowing method and function callbacks
 at no extra memory or runtime overhead.
 - optional Perl interface with similar characteristics (capable
 of running Glib/Gtk2 on libev, interfaces with Net::SNMP and
 libadns).
 - support for other languages (multiple C++ interfaces, D, Ruby,
 Python) available from third-parties.
 Examples of programs that embed libev: the EV perl module,
 rxvt-unicode, gvpe (GNU Virtual Private Ethernet), the Deliantra MMORPG
 server (http://www.deliantra.net/), Rubinius (a next-generation Ruby
 VM), the Ebb web server, the Rev event toolkit.
CONTRIBUTORS
 libev was written and designed by Marc Lehmann and Emanuele Giaquinta.
 The following people sent in patches or made other noteworthy
 contributions to the design (for minor patches, see the Changes
 file. If I forgot to include you, please shout at me, it was an
 accident):
 W.C.A. Wijngaards
 Christopher Layne
 Chris Brody