[Python-Dev] py2.7: dictobject not properly resizing

[Antoine Pitrou]

On Sat, 30 Mar 2013 17:31:26 -0400
Micha Gorelick <mynameisfiber at gmail.com> wrote:
> I was taking a look at dictobject.c and realized that the logic
> controlling whether a resizedict will occur in
> dict_set_item_by_hash_or_entry disallows for the shrinking of a
> dictionary.  This is contrary to what the comments directly above say:

Also in 3.4:

>>> d = {i: i for i in range(1000)}
>>> sys.getsizeof(d)
49264
>>> for i in range(900): del d[i]
... 
>>> sys.getsizeof(d)
49264
>>> for i in range(900, 1000): del d[i]
... 
>>> sys.getsizeof(d)
49264
>>> len(d)
0
>>> d.clear()
>>> sys.getsizeof(d)
88


Regards

Antoine.