[pypy-dev] thoughts on built-in support for coroutine suspension on lowlevel io

[Maciej Fijalkowski]

On Wed, Sep 28, 2011 at 5:13 AM, Armin Rigo <arigo at tunes.org> wrote:
> Hi Ronny,
>
> On Tue, Sep 27, 2011 at 23:27, Ronny Pfannschmidt
> <Ronny.Pfannschmidt at gmx.de> wrote:
>> I’d like to collect thoughts on having built-in primitives for
>> co-routine suspension
>>
>> it would greatly simplify the work for tool-kits like eventlet/gevent,
>> since no longer they would need to monkey-patch all parts of the std-lib
>
> While it's a worthwhile goal, I don't know if the final benefit is
> positive.  I can see two ways to do it inside PyPy: either we tweak
> all built-in functions to call OS-provided non-blocking versions
> internally (which wouldn't be any less annoying than just patching all
> stdlib functions from app-level), or we spawn threads and run the
> blocking calls there (but then you have a big scalability issue).
> Ideally a mix of the two would be best, but I don't quite see how to
> work around *all* scalability issues.
>

And Ctrl-C stops working etc. etc. Those are not *really* answers.