Implemented Martin's suggestion to clear the free lists during the garbage collection of the highest generation.
diff --git a/Doc/c-api/tuple.rst b/Doc/c-api/tuple.rst
index b25adb3..1fcf5fc 100644
--- a/Doc/c-api/tuple.rst
+++ b/Doc/c-api/tuple.rst
@@ -115,3 +115,10 @@
 
    .. versionchanged:: 2.2
       Removed unused third parameter, *last_is_sticky*.
+
+
+.. cfunction:: int PyMethod_ClearFreeList(void)
+
+   Clear the free list. Return the total number of freed items.
+
+   .. versionadded:: 2.6