tree 296b337317ac71d34001c17f4b4b7bea918cbf6f
parent 85c84920f511d0d73a133336daeaf715a022cd64
author Yurii Karabas <1998uriyyo@gmail.com> 1606300998 +0200
committer GitHub <noreply@github.com> 1606300998 +0900
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bpo-42202: Store func annotations as a tuple (GH-23316)

Reduce memory footprint and improve performance of loading modules having many func annotations.

  >>> sys.getsizeof({"a":"int","b":"int","return":"int"})
  232
  >>> sys.getsizeof(("a","int","b","int","return","int"))
  88

The tuple is converted into dict on the fly when `func.__annotations__` is accessed first.

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Inada Naoki <songofacandy@gmail.com>