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Implement compact dict

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Issue #27350: `dict` implementation is changed like PyPy. It is more compact
and preserves insertion order.

_PyDict_Dummy() function has been removed.

Disable test_gdb: python-gdb.py is not updated yet to the new structure of
compact dictionaries (issue #28023).

Patch written by INADA Naoki.
This commit is contained in:
Victor Stinner 2016-09-07 17:40:12 -07:00
parent d8b7770a0e
commit 742da040db
12 changed files with 793 additions and 569 deletions
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6
Lib/test/test_descr.py
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@ -5116,12 +5116,14 @@ class SharedKeyTests(unittest.TestCase):
a, b = A(), B()
self.assertEqual(sys.getsizeof(vars(a)), sys.getsizeof(vars(b)))
self.assertLess(sys.getsizeof(vars(a)), sys.getsizeof({}))
a.x, a.y, a.z, a.w = range(4)
# Initial hash table can contain at most 5 elements.
# Set 6 attributes to cause internal resizing.
a.x, a.y, a.z, a.w, a.v, a.u = range(6)
self.assertNotEqual(sys.getsizeof(vars(a)), sys.getsizeof(vars(b)))
a2 = A()
self.assertEqual(sys.getsizeof(vars(a)), sys.getsizeof(vars(a2)))
self.assertLess(sys.getsizeof(vars(a)), sys.getsizeof({}))
b.u, b.v, b.w, b.t = range(4)
b.u, b.v, b.w, b.t, b.s, b.r = range(6)
self.assertLess(sys.getsizeof(vars(b)), sys.getsizeof({}))