[pypy-dev] pypy1.6 slow on string-heavy ops

[Andy]

Hi,

Anyone who can answer my previous question - "what if my greenlet needs to call multiple Web services or that it's a long running one? In those cases the greenlet will be blocked and resumed many times. How does PyPy handle that?"

Thanks.


________________________________
From: Andy <angelflow at yahoo.com>
To: Armin Rigo <arigo at tunes.org>
Cc: "pypy-dev at python.org" <pypy-dev at python.org>
Sent: Sunday, August 21, 2011 2:31 AM
Subject: Re: [pypy-dev] pypy1.6 slow on string-heavy ops


Thanks Armin.

I dug around and found an email from you titled "Stacklets". Is that the new solution?

If I understand correctly, in this solution a greenlet could only be suspended and resumed once. But what if my greenlet needs to call multiple Web services or that it's a long running one? In those cases the greenlet will be blocked and resumed many times. How does PyPy handle that?


________________________________
From: Armin Rigo <arigo at tunes.org>
To: Andy <angelflow at yahoo.com>
Cc: Jacob Biesinger <jake.biesinger at gmail.com>; "pypy-dev at python.org" <pypy-dev at python.org>
Sent: Saturday, August 20, 2011 5:43 AM
Subject: Re: [pypy-dev] pypy1.6 slow on string-heavy ops

Hi Andy,

On Fri, Aug 19, 2011 at 5:48 PM, Andy <angelflow at yahoo.com> wrote:
> I remember reading in this list that PyPy-JIT would not work with greenlet
> because of how greentlet manipulated the C stack and there wasn't any easy solution.

No, I think you are confusing two topics.  The existing Stackless
PyPy, which does no C stack manipulation, doesn't work with the
 JIT
without a lot of careful work.  This solution is deprecated now.  The
new solution, which does C stack manipulation, works with the JIT out
of the box.  Both solutions are "implementation details" only; you get
the same tasklet/greenlet API to work with.

> So will PyPy JIT work with gevent which is based on libevent (and soon to be
> libev)? Any target release date?

Yes.  The next release is likely to be 1.6.1 soonish.


A bientôt,

Armin.



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