… | |
… | |
80 | module. |
80 | module. |
81 | |
81 | |
82 | During the first call of any watcher-creation method, the module tries |
82 | During the first call of any watcher-creation method, the module tries |
83 | to detect the currently loaded event loop by probing whether one of the |
83 | to detect the currently loaded event loop by probing whether one of the |
84 | following modules is already loaded: L<Coro::EV>, L<Coro::Event>, L<EV>, |
84 | following modules is already loaded: L<Coro::EV>, L<Coro::Event>, L<EV>, |
85 | L<Event>, L<Glib>, L<Tk>, L<AnyEvent::Impl::Perl>, L<Event::Lib>, L<Qt>, |
85 | L<Event>, L<Glib>, L<AnyEvent::Impl::Perl>, L<Tk>, L<Event::Lib>, L<Qt>, |
86 | L<POE>. The first one found is used. If none are found, the module tries |
86 | L<POE>. The first one found is used. If none are found, the module tries |
87 | to load these modules (excluding Event::Lib, Qt and POE as the pure perl |
87 | to load these modules (excluding Tk, Event::Lib, Qt and POE as the pure perl |
88 | adaptor should always succeed) in the order given. The first one that can |
88 | adaptor should always succeed) in the order given. The first one that can |
89 | be successfully loaded will be used. If, after this, still none could be |
89 | be successfully loaded will be used. If, after this, still none could be |
90 | found, AnyEvent will fall back to a pure-perl event loop, which is not |
90 | found, AnyEvent will fall back to a pure-perl event loop, which is not |
91 | very efficient, but should work everywhere. |
91 | very efficient, but should work everywhere. |
92 | |
92 | |
… | |
… | |
359 | AnyEvent::Impl::CoroEV based on Coro::EV, best choice. |
359 | AnyEvent::Impl::CoroEV based on Coro::EV, best choice. |
360 | AnyEvent::Impl::CoroEvent based on Coro::Event, second best choice. |
360 | AnyEvent::Impl::CoroEvent based on Coro::Event, second best choice. |
361 | AnyEvent::Impl::EV based on EV (an interface to libev, best choice). |
361 | AnyEvent::Impl::EV based on EV (an interface to libev, best choice). |
362 | AnyEvent::Impl::Event based on Event, second best choice. |
362 | AnyEvent::Impl::Event based on Event, second best choice. |
363 | AnyEvent::Impl::Glib based on Glib, third-best choice. |
363 | AnyEvent::Impl::Glib based on Glib, third-best choice. |
|
|
364 | AnyEvent::Impl::Perl pure-perl implementation, inefficient but portable. |
364 | AnyEvent::Impl::Tk based on Tk, very bad choice. |
365 | AnyEvent::Impl::Tk based on Tk, very bad choice. |
365 | AnyEvent::Impl::Perl pure-perl implementation, inefficient but portable. |
|
|
366 | AnyEvent::Impl::Qt based on Qt, cannot be autoprobed (see its docs). |
366 | AnyEvent::Impl::Qt based on Qt, cannot be autoprobed (see its docs). |
367 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
367 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
368 | AnyEvent::Impl::POE based on POE, not generic enough for full support. |
368 | AnyEvent::Impl::POE based on POE, not generic enough for full support. |
369 | |
369 | |
370 | There is no support for WxWidgets, as WxWidgets has no support for |
370 | There is no support for WxWidgets, as WxWidgets has no support for |
… | |
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921 | =head2 Discussion |
921 | =head2 Discussion |
922 | |
922 | |
923 | The benchmark does I<not> measure scalability of the event loop very |
923 | The benchmark does I<not> measure scalability of the event loop very |
924 | well. For example, a select-based event loop (such as the pure perl one) |
924 | well. For example, a select-based event loop (such as the pure perl one) |
925 | can never compete with an event loop that uses epoll when the number of |
925 | can never compete with an event loop that uses epoll when the number of |
926 | file descriptors grows high. In this benchmark, only a single filehandle |
926 | file descriptors grows high. In this benchmark, all events become ready at |
927 | is used (although some of the AnyEvent adaptors dup() its file descriptor |
927 | the same time, so select/poll-based implementations get an unnatural speed |
928 | to worka round bugs). |
928 | boost. |
929 | |
929 | |
930 | C<EV> is the sole leader regarding speed and memory use, which are both |
930 | C<EV> is the sole leader regarding speed and memory use, which are both |
931 | maximal/minimal, respectively. Even when going through AnyEvent, there are |
931 | maximal/minimal, respectively. Even when going through AnyEvent, there are |
932 | only two event loops that use slightly less memory (the C<Event> module |
932 | only two event loops that use slightly less memory (the C<Event> module |
933 | natively and the pure perl backend), and no faster event models, not even |
933 | natively and the pure perl backend), and no faster event models, not even |