x64 speed

Robin Becker robin at reportlab.com
Wed Feb 4 05:14:56 EST 2009


Martin v. Löwis wrote:
>>> I follow David's guess that Linux does better IO than Windows (not
>>> knowing anything about the benchmark, of course)
>>>
>> I originally thought it must be the vmware host stuff offloading IO to
>> the second core, but watching with sysinternals didn't show a lot of
>> extra stuff going on with the vm compared to just running on the host.
> 
> I'm not talking about vmware. I'm suggesting that Linux ext3, and the
> Linux buffer handling, is just more efficient than NTFS, and the Windows
> buffer handling.
> 
> If you split the total runtime into system time and user time, how do
> the 30s split up?
.......
so here is one for the vm clock is bad theorists :)


> [rptlab at localhost tests]$ time python25 runAll.py
> .............................................................

.........................
> ----------------------------------------------------------------------
> Ran 193 tests in 27.841s
> 
> OK
> 
> real    0m28.150s
> user    0m26.606s
> sys     0m0.917s
> [rptlab at localhost tests]$

magical how the total python time is less than the real time.
-- 
Robin Becker




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