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bpo-40575: Avoid unnecessary overhead in _PyDict_GetItemIdWithError() (GH-20018)

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Avoid unnecessary overhead in _PyDict_GetItemIdWithError() by calling
_PyDict_GetItem_KnownHash() instead of the more generic PyDict_GetItemWithError(),
since we already know the hash of interned strings.
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scoder 2020-05-11 06:04:31 +02:00 committed by GitHub
parent 5b956ca42d
commit 6067d4bc3c
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1 changed files with 3 additions and 1 deletions
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4
Objects/dictobject.c
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@ -1492,7 +1492,9 @@ _PyDict_GetItemIdWithError(PyObject *dp, struct _Py_Identifier *key)
kv = _PyUnicode_FromId(key); /* borrowed */
if (kv == NULL)
return NULL;
return PyDict_GetItemWithError(dp, kv);
Py_hash_t hash = ((PyASCIIObject *) kv)->hash;
assert (hash != -1); /* interned strings have their hash value initialised */
return _PyDict_GetItem_KnownHash(dp, kv, hash);
}
PyObject *