[Cython] better handling of numeric types

[Robert Bradshaw]

On Feb 27, 2009, at 5:13 AM, Lisandro Dalcin wrote:

> On Fri, Feb 27, 2009 at 10:15 AM, Robert Bradshaw
> <robertwb at math.washington.edu> wrote:
>>
>> On Feb 27, 2009, at 3:59 AM, Lisandro Dalcin wrote:
>>
>>> Next we can discuss how to optimize this....
>>
>> As long as we don't slow down the (very common) Python int -> int/
>> long code, I'm OK with deferring optimization.
>>
>
> However, do you realize that for Py3 these optimizations are a bit
> pointless?

I'm still not sure where I stand on the union of the long and int  
types--certainly it makes some things easier, but it also seems to  
slow other things down. In any case, I foresee Cython being used with  
Python 2.x for quite some time into the future.

> Moreover, if you look at core CPython 2.X sources, you will
> find many places were were optimizations could be made, but they are
> not there...

True, but who says we can't do better :).

> Anyway, I'll try to do my best...

Don't worry, I have high confidence in you.

- Robert