On 2018-06-20 16:42, Antoine Pitrou wrote:

I'm wondering what amount of code and debugging is needed for, say, Cython or Numba to implement that protocol as a caller, without going through the C API's indirections (for performance).

The goal is to have a really fast C API without a lot of indirections. If Cython or Numba can implement the protocol faster than CPython, we should just change the CPython implementation to be equally fast.