[Python-Dev] are NULL checks in Objects/abstract.c really
needed?
Michael Hudson
mwh@python.net
Thu, 13 Mar 2003 14:33:21 +0000
Michal Vitecek <fuf@mageo.cz> writes:
> Michael Hudson wrote:
>>Wow! Can we persuade you to try CVS HEAD?
>
> okay - i did as you said and the speed-up is only 2.1% so it's not
> probably worth it. here come the numbers:
I didn't say "*two* point one", I said "*nought* point one"!:
BEFORE:
$ for i in 1 2 3 4 5; do ./python- ../Lib/test/pystone.py; done
Pystone(1.1) time for 50000 passes = 3.39
This machine benchmarks at 14749.3 pystones/second
Pystone(1.1) time for 50000 passes = 3.39
This machine benchmarks at 14749.3 pystones/second
Pystone(1.1) time for 50000 passes = 3.38
This machine benchmarks at 14792.9 pystones/second
Pystone(1.1) time for 50000 passes = 3.37
This machine benchmarks at 14836.8 pystones/second
Pystone(1.1) time for 50000 passes = 3.39
This machine benchmarks at 14749.3 pystones/second
AFTER:
$ for i in 1 2 3 4 5; do ./python ../Lib/test/pystone.py; done
Pystone(1.1) time for 50000 passes = 3.38
This machine benchmarks at 14792.9 pystones/second
Pystone(1.1) time for 50000 passes = 3.38
This machine benchmarks at 14792.9 pystones/second
Pystone(1.1) time for 50000 passes = 3.38
This machine benchmarks at 14792.9 pystones/second
Pystone(1.1) time for 50000 passes = 3.38
This machine benchmarks at 14792.9 pystones/second
Pystone(1.1) time for 50000 passes = 3.4
This machine benchmarks at 14705.9 pystones/second
If it was a 2% gain, I'd say go for it (though Guido isn't so sure, it
seems).
What compiler/platform are you using?
Cheers,
M.
--
languages shape the way we think, or don't.
-- Erik Naggum, comp.lang.lisp