avoid a function call with redundant checks for dict size

diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index 664b58c8c5bcf12b19fa7d2c605547bd2e13681f..ba36b180cad23a48fd9671ba268961e57a334524 100644 (file)
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -1353,7 +1353,7 @@ dict_fromkeys(PyObject *cls, PyObject *args)
     if (d == NULL)
         return NULL;
 
-    if (PyDict_CheckExact(d) && PyDict_Size(d) == 0) {
+    if (PyDict_CheckExact(d) && ((PyDictObject *)d)->ma_used == 0) {
         if (PyDict_CheckExact(seq)) {
             PyDictObject *mp = (PyDictObject *)d;
             PyObject *oldvalue;