[Python-Dev] Decimal news: speedup and stabilization
Nick Coghlan
ncoghlan at gmail.com
Sun Dec 2 16:43:37 CET 2007
Facundo Batista wrote:
> 2007/11/24, Nick Coghlan <ncoghlan at gmail.com>:
>
>> Did you change the Decimal repr to use the same format for the mantissa?
>
> I don't understand the question. The output of repr() does not show
> this internals...
Yeah, um... can we just forget I asked that question? (I blame lack of
sleep, or coffee, or something...)
>> Could you also check the performance gain against the telco benchmark
>> which is in the sandbox? [1]
>
> I tested different versions of Decimal with this telco.py.
>
> With Python from the trunk (r58550), which is the last decimal.py
> version previous to this change: 1241.8
>
> After changed it to keep _int as string: 869.3 (30% faster!)
>
> But still there're a lot of room for improvements. I just commited
> other patch from Mark, where he reordered __new__, to minimize
> isinstance() checks for the most used types.}
>
> After new reordering patch: 672.9 (22% faster!)
Great news!
Cheers,
Nick.
--
Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia
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