On 8/25/05, Erik Max Francis <[EMAIL PROTECTED]> wrote:
> Bill Mill wrote:
>
> > Unlikely; 2 people have confirmed these results already.
> >
> > I did find, though, that if I remove all print statements from the
> > program, the dummy and non-dummy variable versions take indentical
> > time. Can others reproduce this?
>
> Yes, it's obviously a real effect given the other sightings. I don't
> see any speed difference, myself (Pentium IV 3.0 GHz running Slackware
> Linux).
>
Pentium M 1.8 GHz Windows 2k. Here's the top of the profile results
for fast and slow on my machine (these won't look decent except in a
fixed-width font):
Slow:
6766494 function calls (6737594 primitive calls) in 45.740 CPU seconds
Ordered by: internal time
ncalls tottime percall cumtime percall filename:lineno(function)
3322320 20.539 0.000 31.152 0.000 test.py:135(<generator expression>
)
27520 10.641 0.000 41.792 0.002 :0(min)
3322320 10.613 0.000 10.613 0.000 test.py:81(rowitems)
28100/20 3.620 0.000 45.633 2.282 test.py:130(search)
27545 0.113 0.000 0.113 0.000 :0(append)
27520 0.098 0.000 0.098 0.000 :0(pop)
1 0.041 0.041 45.736 45.736 test.py:36(?)
Fast:
540174 function calls (536514 primitive calls) in 3.506 CPU seconds
Ordered by: internal time
ncalls tottime percall cumtime percall filename:lineno(function)
259640 1.516 0.000 2.303 0.000 test.py:135(<generator expression>
)
2280 0.791 0.000 3.094 0.001 :0(min)
259640 0.788 0.000 0.788 0.000 test.py:81(rowitems)
2860/20 0.269 0.000 3.391 0.170 test.py:130(search)
1 0.045 0.045 3.499 3.499 test.py:2(?)
3645 0.021 0.000 0.021 0.000 test.py:71(colinsert)
3240 0.019 0.000 0.019 0.000 test.py:62(rowinsert)
2305 0.010 0.000 0.010 0.000 :0(append)
Interestingly, the test.py:36 line, which takes 45 seconds (!!) in the
slow version, does not appear at all in the fast profile. I can't
figure out why - both printed out their data, so template must have
been called somewhere.
Peace
Bill Mill
bill.mill at gmail.com
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