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Add an exact type match fast path for deque_copy().

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Raymond Hettinger 2015-09-13 19:27:01 -04:00
parent ba5747b8bd
commit e4f3467df1
1 changed files with 16 additions and 0 deletions
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16
Modules/_collectionsmodule.c
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@ -1205,6 +1205,22 @@ deque_traverse(dequeobject *deque, visitproc visit, void *arg)
static PyObject * static PyObject *
deque_copy(PyObject *deque) deque_copy(PyObject *deque)
{ {
if (Py_TYPE(deque) == &deque_type) {
dequeobject *new_deque;
PyObject *rv;
new_deque = (dequeobject *)deque_new(&deque_type, (PyObject *)NULL, (PyObject *)NULL);
if (new_deque == NULL)
return NULL;
new_deque->maxlen = ((dequeobject *)deque)->maxlen;
rv = deque_extend(new_deque, deque);
if (rv != NULL) {
Py_DECREF(rv);
return (PyObject *)new_deque;
}
Py_DECREF(new_deque);
return NULL;
}
if (((dequeobject *)deque)->maxlen == -1) if (((dequeobject *)deque)->maxlen == -1)
return PyObject_CallFunction((PyObject *)(Py_TYPE(deque)), "O", deque, NULL); return PyObject_CallFunction((PyObject *)(Py_TYPE(deque)), "O", deque, NULL);
else else