INADA Naoki added the comment:
> I mean creating a solo empty dict doesn't seem to make much sense. Although
> it saves memory, but when it's populated, it's resized and the memory
> occupation comes back.
But sometimes it's not populated.
class A:
def __init__(self, **kwargs):
self._extra = kwargs
xa = [A() for _ in range(1000)]
So problem is (a) how many empty dicts, and (b) how much memory this patch
saves.
> And this makes PyDict_New() hard to understand. :-(
Yes, but it is not new complexity because it's same to d.clear().
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