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bpo-31586: Use _count_element fast path for real dicts.

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Oren Milman 2017-09-27 06:18:21 +03:00 • committed by Raymond Hettinger
parent c740e4fe8a
commit 31aca4bf79
1 changed files with 3 additions and 1 deletions
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4
Modules/_collectionsmodule.c
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@ -2277,7 +2277,9 @@ _count_elements(PyObject *self, PyObject *args)
dict_setitem = _PyType_LookupId(&PyDict_Type, &PyId___setitem__); dict_setitem = _PyType_LookupId(&PyDict_Type, &PyId___setitem__);
if (mapping_get != NULL && mapping_get == dict_get && if (mapping_get != NULL && mapping_get == dict_get &&
mapping_setitem != NULL && mapping_setitem == dict_setitem) { mapping_setitem != NULL && mapping_setitem == dict_setitem &&
PyDict_Check(mapping))
{
while (1) { while (1) {
/* Fast path advantages: /* Fast path advantages:
1. Eliminate double hashing 1. Eliminate double hashing