[pypy-dev] Cython-CEP: Native dispatch through Python callables

[Stefan Behnel]

Stefan Behnel, 14.04.2012 09:36:
> wlavrijsen at lbl.gov, 13.04.2012 22:19:
>> Same goes for C++ overloads (with a little care): each overload that fails
>> should result in a (python) exception during mapping of the arguments. The
>> JIT then removes those branches from the trace, leaving only the call that
>> succeeded in the optimized trace. Thus, any time spent making the selection
>> of the overload efficient is mostly wasted, as that code gets completely
>> removed.
> 
> A static compiler would handle that similarly.

Ah, sorry, misread your paragraph. You were talking about alternative
signatures. Yes, those require at least some setup overhead in static code.
Should be possible to avoid that overhead in loops, though. We'll see how
that works out.

Stefan