bpo-32544: Speed up hasattr() and getattr() (GH-5173)

AttributeError was raised always when attribute is not found.
This commit skip raising AttributeError when `tp_getattro` is `PyObject_GenericGetAttr`.
It makes hasattr() and getattr() about 4x faster when attribute is not found.

1 files changed, 4 insertions, 2 deletions

diff --git a/Modules/_threadmodule.c b/Modules/_threadmodule.c
index c9171f52e3..f594bda678 100644
--- a/Modules/_threadmodule.c
+++ b/Modules/_threadmodule.c
@@ -925,13 +925,15 @@ local_getattro(localobject *self, PyObject *name)
 
     if (Py_TYPE(self) != &localtype)
         /* use generic lookup for subtypes */
-        return _PyObject_GenericGetAttrWithDict((PyObject *)self, name, ldict);
+        return _PyObject_GenericGetAttrWithDict(
+            (PyObject *)self, name, ldict, 0);
 
     /* Optimization: just look in dict ourselves */
     value = PyDict_GetItem(ldict, name);
     if (value == NULL)
         /* Fall back on generic to get __class__ and __dict__ */
-        return _PyObject_GenericGetAttrWithDict((PyObject *)self, name, ldict);
+        return _PyObject_GenericGetAttrWithDict(
+            (PyObject *)self, name, ldict, 0);
 
     Py_INCREF(value);
     return value;