[Python-Dev] Specifying Python version when running piethon benchmark (original) (raw)

Skip Montanaro skip at pobox.com
Fri Jan 2 11:54:26 EST 2004 

>> 800 MHz Ti PowerBook (G4), using Python from CVS, output of make
>> (second run of two, to make sure pyo files were already generated):
>> 
>> time python -O b.py >@out
>> 
>> real    0m49.999s
>> user    0m46.610s
>> sys     0m1.030s
>> cmp @out out
>> 
>> The best-of-three pystone measurement is 10964.9 pystones/second.

Michael> Bloody hell, that about what I get on my 600Mhz G3 iBook (same
Michael> model as Dan's, sounds like).  Does your TiBook have no cache
Michael> or a *really* slow bus or something?

The Apple System Profiler says my bus speed is 133MHz. I have a 256K L2 cache and a 1MB L3 cache. The machine has 1GB of RAM.

Some rather simple operations slow down considerably after the system's been up awhile (and I do tend to leave it up for days or weeks at a time). I don't recall how long it had been up when I ran those tests. I just ran pystone again - it's been up 2 days, 19 hrs at the moment - and got significantly better numbers:

% python ~/src/python/head/dist/src/Lib/test/pystone.py 
Pystone(1.1) time for 50000 passes = 3.82
This machine benchmarks at 13089 pystones/second
% python ~/src/python/head/dist/src/Lib/test/pystone.py 
Pystone(1.1) time for 50000 passes = 3.83
This machine benchmarks at 13054.8 pystones/second
% python ~/src/python/head/dist/src/Lib/test/pystone.py 
Pystone(1.1) time for 50000 passes = 3.78
This machine benchmarks at 13227.5 pystones/second

Rerunning the parrotbench code shows a decided improvement as well:

% make
time python -O b.py >@out

real    0m40.018s
user    0m38.620s
sys     0m0.900s
cmp @out out

Skip

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