On Sat, 18 Jul 2020 at 10:02, Inada Naoki <songofaca...@gmail.com> wrote:
> On Sat, Jul 18, 2020 at 7:05 AM Marco Sulla > <marco.sulla.pyt...@gmail.com> wrote: > > For what I know, CPython uses PyDictObject for kwargs. Since dicts are > > mutable, it's a problem to cache them properly. > > On caller side, Python doesn't use dict at all. > On callee side, dict is used for `**kwargs`. But changing it to > frozendict is > backward incompatible change. > Not sure of what you mean with caller and callee. If you're talking about Python, I agree, kwargs must be dicts. But I was talking about CPython and PyDictObject, that is used internally for kwargs. On Sat, 18 Jul 2020 at 10:02, Inada Naoki <songofaca...@gmail.com> wrote: > Currently, `for k,v in d.items()` > doesn't create > temporary list or set-like. > I think using "real object" is not good performance optimization. > Well, this is true... but they create view objects that are quite slow. -- https://mail.python.org/mailman/listinfo/python-list
