Issue #19369: Optimized the usage of __length_hint__().
diff --git a/Objects/abstract.c b/Objects/abstract.c
index d937892..6c7a6cd 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -82,15 +82,17 @@
PyObject *hint, *result;
Py_ssize_t res;
_Py_IDENTIFIER(__length_hint__);
- res = PyObject_Length(o);
- if (res < 0 && PyErr_Occurred()) {
- if (!PyErr_ExceptionMatches(PyExc_TypeError)) {
- return -1;
+ if (_PyObject_HasLen(o)) {
+ res = PyObject_Length(o);
+ if (res < 0 && PyErr_Occurred()) {
+ if (!PyErr_ExceptionMatches(PyExc_TypeError)) {
+ return -1;
+ }
+ PyErr_Clear();
}
- PyErr_Clear();
- }
- else {
- return res;
+ else {
+ return res;
+ }
}
hint = _PyObject_LookupSpecial(o, &PyId___length_hint__);
if (hint == NULL) {