mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-30 21:48:47 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

bpo-46845: Reduce dict size when all keys are Unicode (GH-31564)

Browse source
This commit is contained in:
Inada Naoki 2022-03-02 08:09:28 +09:00 • committed by GitHub
parent 21099fc064
commit 9833bb91e4
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
9 changed files with 884 additions and 491 deletions
Download patch file Download diff file Expand all files Collapse all files

12
Lib/test/test_sys.py
View file

@ -1346,8 +1346,12 @@ class SizeofTest(unittest.TestCase):
check({}.__iter__, size('2P'))
# empty dict
check({}, size('nQ2P'))
# dict
check({"a": 1}, size('nQ2P') + calcsize(DICT_KEY_STRUCT_FORMAT) + 8 + (8*2//3)*calcsize('n2P'))
# dict (string key)
check({"a": 1}, size('nQ2P') + calcsize(DICT_KEY_STRUCT_FORMAT) + 8 + (8*2//3)*calcsize('2P'))
longdict = {str(i): i for i in range(8)}
check(longdict, size('nQ2P') + calcsize(DICT_KEY_STRUCT_FORMAT) + 16 + (16*2//3)*calcsize('2P'))
# dict (non-string key)
check({1: 1}, size('nQ2P') + calcsize(DICT_KEY_STRUCT_FORMAT) + 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(DICT_KEY_STRUCT_FORMAT) + 16 + (16*2//3)*calcsize('n2P'))
# dictionary-keyview
@ -1506,14 +1510,14 @@ class SizeofTest(unittest.TestCase):
)
class newstyleclass(object): pass
# Separate block for PyDictKeysObject with 8 keys and 5 entries
check(newstyleclass, s + calcsize(DICT_KEY_STRUCT_FORMAT) + 64 + 42*calcsize("n2P"))
check(newstyleclass, s + calcsize(DICT_KEY_STRUCT_FORMAT) + 64 + 42*calcsize("2P"))
# dict with shared keys
[newstyleclass() for _ in range(100)]
check(newstyleclass().__dict__, size('nQ2P') + self.P)
o = newstyleclass()
o.a = o.b = o.c = o.d = o.e = o.f = o.g = o.h = 1
# Separate block for PyDictKeysObject with 16 keys and 10 entries
check(newstyleclass, s + calcsize(DICT_KEY_STRUCT_FORMAT) + 64 + 42*calcsize("n2P"))
check(newstyleclass, s + calcsize(DICT_KEY_STRUCT_FORMAT) + 64 + 42*calcsize("2P"))
# dict with shared keys
check(newstyleclass().__dict__, size('nQ2P') + self.P)
# unicode