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bpo-45340: Don't create object dictionaries unless actually needed (GH-28802)

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* Never change types' cached keys. It could invalidate inline attribute objects.

* Lazily create object dictionaries.

* Update specialization of LOAD/STORE_ATTR.

* Don't update shared keys version for deletion of value.

* Update gdb support to handle instance values.

* Rename SPLIT_KEYS opcodes to INSTANCE_VALUE.
This commit is contained in:
Mark Shannon 2021-10-13 14:19:34 +01:00 • committed by GitHub
parent 97308dfcdc
commit a8b9350964
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18 changed files with 721 additions and 400 deletions
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5
Lib/test/test_dict.py
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@ -994,8 +994,8 @@ class DictTest(unittest.TestCase):
@support.cpython_only
def test_splittable_setdefault(self):
"""split table must be combined when setdefault()
breaks insertion order"""
"""split table must keep correct insertion
order when attributes are adding using setdefault()"""
a, b = self.make_shared_key_dict(2)
a['a'] = 1
@ -1005,7 +1005,6 @@ class DictTest(unittest.TestCase):
size_b = sys.getsizeof(b)
b['a'] = 1
self.assertGreater(size_b, size_a)
self.assertEqual(list(a), ['x', 'y', 'z', 'a', 'b'])
self.assertEqual(list(b), ['x', 'y', 'z', 'b', 'a'])