Reading about this, yes, but there is hope:

http://morepypy.blogspot.se/2012/08/multicore-programming-in-pypy-and.html

Jonathan


On Mon, Apr 29, 2013 at 10:45 PM, Timothy Baldridge <tbaldri...@gmail.com>wrote:

> But as Konrad pointed out, the python VM (and the pypy vm) offers nothing
> that JVMs don't support better. Everything from concurrency to the GC is
> implemented better in the JVM.
>
> Timothy
>
>
> On Mon, Apr 29, 2013 at 2:41 PM, Jonathan Fischer Friberg <
> odysso...@gmail.com> wrote:
>
>> On Mon, Apr 29, 2013 at 5:25 PM, Konrad Hinsen <
>> googlegro...@khinsen.fastmail.net> wrote:
>>
>>> --On 29 avril 2013 09:09:27 -0400 Lee Spector <lspec...@hampshire.edu>
>>> wrote:
>>>
>>>  On Apr 29, 2013, at 9:01 AM, Jonathan Fischer Friberg wrote:
>>>>
>>>>  You could always give 
>>>> https://github.com/halgari/**clojure-py<https://github.com/halgari/clojure-py>a
>>>>  spin,
>>>>> might not be so easy to get everything working though. :)
>>>>>
>>>>
>>>> It might be worth it, if we could still write in Clojure and get good
>>>> multicore utilization and good performance overall for our application.
>>>>
>>>> Is there evidence that code written/run this way will perform
>>>> particularly well?
>>>>
>>>
>>> No. The Python VM has a global interpreter lock that prevents parallel
>>> execution of Python bytecode. If you want to parallel processing in Python
>>> (more precisely, the CPython implementation), you must either port
>>> CPU-intensive stuff to C or Cython, or run multiple communicating CPython
>>> instances.
>>>
>>> Konrad.
>>
>>
>> clojure-py code should run on pypy, which is much more promising;
>> http://pypy.org/
>> The support for http://www.stackless.com/ is especially interesting.
>>
>> Jonathan
>>
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>
>
>
> --
> “One of the main causes of the fall of the Roman Empire was that–lacking
> zero–they had no way to indicate successful termination of their C
> programs.”
> (Robert Firth)
>
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