This module provides an interface to libev (the
http://software.schmorp.de/pkg/libev.html manpage). While the documentation
below is comprehensive, one might also consult the documentation of libev
itself (the http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod manpage or
_perldoc EV::libev_) for more subtle details on watcher semantics or some
discussion on the available backends, or how to force a specific backend
with 'LIBEV_FLAGS', or just about in any case because it has much more
detailed information.

This module is very fast and scalable. It is actually so fast that you can
use it through the the AnyEvent manpage module, stay portable to other
event loops (if you don't rely on any watcher types not available through
it) and still be faster than with any other event loop currently supported
in Perl.