importlib/_bootstrap.py: Reduce size of _List instances (GH-114747)

Eclips4 · web-flow · commit 6de8aa31f39b · 2024-01-30T10:44:09.000-08:00
Reduce size of _List instances
diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
@@ -53,7 +53,7 @@ def _new_module(name):
 
 # For a list that can have a weakref to it.
 class _List(list):
-    pass
+    __slots__ = ("__weakref__",)
 
 
 # Copied from weakref.py with some simplifications and modifications unique to
