start_pos is usually not needed to search in modules, but if we generalize that, things get a lot slower - tests still pass - but the slowness is probably due to some weird recursion catching that now happens and that Jedi runs into, e.g. check ./run.py std 27 --debug

jedi/evaluate/compiled/__init__.py

@@ -279,6 +279,8 @@ class Builtin(CompiledObject):
         # access it.
         return [d for d in super(Builtin, self).get_defined_names() if d.name != 'None']
 
+    get_set_vars = get_defined_names
+
 
 def _a_generator(foo):
     """Used to have an object to return for generators."""