Overcoming python performance penalty for multicore CPU

[Terry Reedy]

On 2/2/2010 9:02 PM, alex23 wrote:
> On Feb 3, 9:02 am, John Nagle<na... at animats.com>  wrote:
>>      I know there's a performance penalty for running Python on a
>> multicore CPU, but how bad is it?  I've read the key paper
>> ("www.dabeaz.com/python/GIL.pdf"), of course.
>
> It's a shame that Python 3.x is dead to you, otherwise you'd be able
> to enjoy the new GIL implementation in 3.2: http://www.dabeaz.com/python/NewGIL.pdf
>
> Actually, it looks like you probably still can:
>   + patch for 2.5.4: http://thread.gmane.org/gmane.comp.python.devel/109929
>   + patch for 2.7? http://bugs.python.org/issue7753

The patch was rejected for 2.7 (and earlier) because it could break code 
as explained in the discussion. One would have to apply and compile 
their own binary.