[Python-ideas] The async API of the future

Guido van Rossum guido at python.org
Sun Nov 4 17:19:08 CET 2012

On Sun, Nov 4, 2012 at 8:11 AM, Ben Darnell <ben at bendarnell.com> wrote:
> The extra system calls add up.  The interface of Tornado's IOLoop was based
> on epoll (where the internal state is roughly a mapping {fd: event_set}), so
> it requires more register/unregister operations when running on kqueue
> (where the internal state is roughly a set of (fd, event) pairs).  This
> shows up in benchmarks of the HTTPServer; it's faster on platforms with
> epoll than platforms with kqueue.  In low-concurrency scenarios it's
> actually faster to use select() even when kqueue is available (or maybe
> that's a mac-specific quirk).

Awesome info!

--Guido van Rossum (python.org/~guido)

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