diff --git a/Modules/gcmodule.c b/Modules/gcmodule.c
index bf61cad..31bf471 100644
--- a/Modules/gcmodule.c
+++ b/Modules/gcmodule.c
@@ -753,9 +753,13 @@ delete_garbage(PyGC_Head *collectable, PyGC_Head *old)
  * Allocated items in the free list may keep a pymalloc arena occupied.
  * Clearing the free lists may give back memory to the OS earlier.
  */
+#include <time.h>
 static void
 clear_freelists(void)
 {
+    int t1, t;
+    float tsec;
+    t1 = clock();
     (void)PyMethod_ClearFreeList();
     (void)PyFrame_ClearFreeList();
     (void)PyCFunction_ClearFreeList();
@@ -765,6 +769,9 @@ clear_freelists(void)
     (void)PyDict_ClearFreeList();
     (void)PyList_ClearFreeList();
     (void)PySet_ClearFreeList();
+    t = clock() - t1;
+    tsec = (1000 * (float)t) / CLOCKS_PER_SEC;
+    printf("cleared free lists in %i clock ticks (%fms)\n", t, tsec);
 }
 
 static double