[Pythonmac-SIG] Pystone numbers for different Macs...

[Ronald Oussoren]

On 20 Jan, 2008, at 19:23, Daniel Lord wrote:

> I ran the test  on my 1st Gen Quad Core ( 2 x Quad-core 3.0 GHz, 13GB
> RAM) and was a bit surprised to see  little improvement over the Core
> Duo numbers.
>
> 63019.7 pystones/second
>
> I am assuming the GIL is limiting  threading and therefore I am really
> running on one or two cores--hence the tangible improvement is just
> CPU speed: from 2.33 GHz to 3.0 GHz and a bit of the memory bandwidth
> increase as well.

Pystone is completely single-threaded. Beyond that multi-threaded  
Python code cannot make optimal use from multiple CPU's unless most  
threads run C code (due to the GIL).
>
>
> This is the 32-bit number, I'll find some time to try 64-bit--but
> first want to make sure it doesn't mess up my system as I am using
> Apple Python 2.5.1 exclusively right now and want to avoid the split
> brain problem.

That's easy enough: install the 64-bit version in a location that is  
not on your shell's search path, and don't install it as a framework.

Ronald

>
>
> Daniel
>
> On Jan 20, 2008, at 1:27 AM, Ronald Oussoren wrote:
>
>>
>> On 19 Jan, 2008, at 21:43, skip at pobox.com wrote:
>>
>>>
>>> My Powerbook G4 is getting rather long-in-the-tooth.  It's display  
>>> is
>>> starting to act up, so I think I'm going to buy a new Mac something
>>> in the
>>> fairly near future, but I'm not yet sure what.  To that end, I've
>>> started a
>>> table of pystone numbers for Macs on the Python wiki:
>>>
>>>  http://wiki.python.org/moin/MacPython/MacModelPerformance
>>>
>>> If you could help by adding some rows to the table, especially for
>>> current
>>> MacBook, MacBook Pro or (in the near future, MacBook Air) models,  
>>> I'd
>>> appreciate it.
>>
>> I've posted some numbers as well, which in itself doesn't warrent an
>> e-mail. What is interesting though is the difference between 32-bit
>> and 64-bit code:
>>
>> Python 2.5.2a0 (60124)
>>
>> 32-bit: 52083
>> 64-bit: 60871
>>
>> 64-bit code is significantly faster here (all of this on a MacBook
>> Pro 2.33Ghz/3GByte)
>>
>> Ronald
>>>
>>>
>>> Thanks,
>>>
>>> -- 
>>> Skip Montanaro - skip at pobox.com - http://www.webfast.com/~skip/
>>>
>>> The major difference between Democrats and Republicans is that
>>> Republicans don't know that Randy Newman's lyrics are full of
>>> sarcasm.
>>> _______________________________________________
>>> Pythonmac-SIG maillist  -  Pythonmac-SIG at python.org
>>> http://mail.python.org/mailman/listinfo/pythonmac-sig
>>
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