comment

Author: maurycy

Objects/tupleobject.c

@@ -666,6 +666,11 @@ tuple_richcompare(PyObject *v, PyObject *w, int op)
     if (!PyTuple_Check(v) || !PyTuple_Check(w))
         Py_RETURN_NOTIMPLEMENTED;
 
+    /* Fast path based on identity: if both objects are the same tuple
+     * object, we return immediately without comparing items. Elements that
+     * are not equal to themselves (see check_compare_id in
+     * Lib/tests/seq_tests.py) are therefore treated as equal here.
+     */
     if (v == w) {
         Py_RETURN_RICHCOMPARE(0, 0, op);
     }