[pypy-dev] Small optimization

[Christian Tismer]

Carl Friedrich Bolz wrote:
> Antonio Cuni wrote:
>  > Jean-Paul Calderone wrote:
>  >> Does this break (by ignoring) custom __add__ implementations on int
>  >> subclasses?
>  >
>  > uh, right! :-/
>  >
>  > Well, that means that we should check for the exact classes/python type
>  > instead for subclasses, but I think the optimization is still worth of.
> 
> Isn't this the optimization that Michael already tried? See 
> objspace/std/objspace.py line 65. command line option is 
> --objspace-std-withsmallint
> 
> I turned out to not be worth it in many cases.

But it is known as a useful special case in the CPython interpreter loop.

ciao - chris

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