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| author | Inada Naoki <songofacandy@gmail.com> | 2019-03-12 08:25:44 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-03-12 08:25:44 (GMT) |
| commit | f2a186712bfe726d54723eba37d80c7f0303a50b (patch) | |
| tree | 66667f84b514c1550af31d16c58bc2724aa514b1 /Lib/test | |
| parent | fc06a192fdc44225ef1cc879f615a81931ad0a85 (diff) | |
| download | cpython-f2a186712bfe726d54723eba37d80c7f0303a50b.zip cpython-f2a186712bfe726d54723eba37d80c7f0303a50b.tar.gz cpython-f2a186712bfe726d54723eba37d80c7f0303a50b.tar.bz2 | |
bpo-30040: new empty dict uses key-sharing dict (GH-1080)
Sizeof new empty dict becomes 72 bytes from 240 bytes (amd64).
It is same size to empty dict created by dict.clear().
Diffstat (limited to 'Lib/test')
| -rw-r--r-- | Lib/test/test_descr.py | 6 | ||||
| -rw-r--r-- | Lib/test/test_sys.py | 4 |
2 files changed, 6 insertions, 4 deletions
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py index fc885c5..e39fea6 100644 --- a/Lib/test/test_descr.py +++ b/Lib/test/test_descr.py @@ -5346,16 +5346,16 @@ 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({})) + self.assertLess(sys.getsizeof(vars(a)), sys.getsizeof({"a":1})) # 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({})) + self.assertLess(sys.getsizeof(vars(a)), sys.getsizeof({"a":1})) b.u, b.v, b.w, b.t, b.s, b.r = range(6) - self.assertLess(sys.getsizeof(vars(b)), sys.getsizeof({})) + self.assertLess(sys.getsizeof(vars(b)), sys.getsizeof({"a":1})) class DebugHelperMeta(type): diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py index 92aefd8..4bd54af 100644 --- a/Lib/test/test_sys.py +++ b/Lib/test/test_sys.py @@ -982,8 +982,10 @@ class SizeofTest(unittest.TestCase): check(int.__add__, size('3P2P')) # method-wrapper (descriptor object) check({}.__iter__, size('2P')) + # empty dict + check({}, size('nQ2P')) # dict - check({}, size('nQ2P') + calcsize('2nP2n') + 8 + (8*2//3)*calcsize('n2P')) + check({"a": 1}, size('nQ2P') + calcsize('2nP2n') + 8 + (8*2//3)*calcsize('n2P')) longdict = {1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8} check(longdict, size('nQ2P') + calcsize('2nP2n') + 16 + (16*2//3)*calcsize('n2P')) # dictionary-keyview |