[Python-Dev] speeding up PyObject_GetItem

[Mike Klaas]

On 24-Mar-09, at 3:15 PM, Raymond Hettinger wrote:

>
>> 4% on a micro-micro-benchmark is hardly compelling...
>
> I concur!  This is utterly insignificant and certainly does
> not warrant removing the checks.
>
> -1 on these sort of fake optimizations.  We should focus
> on algorithmic improvements and eliminating redundant
> work and whatnot.  Removing checks that were put there for a reason  
> doesn't seem useful at all.

To be fair, the main proposed optimization(s) would speed up the  
microbenchmark by 15-25% (Daniel already stated that the NULL checks  
didn't have a significant impact).  This seems significant,  
considering that tight loops whose cost is heavily due to array access  
are common.

-Mike