Expanded the test to cover packed fields also.
diff --git a/benchmarks/compare.py b/benchmarks/compare.py
index 9cc21d5..971cc27 100755
--- a/benchmarks/compare.py
+++ b/benchmarks/compare.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 #
 # Copyright (c) 2009-2021, Google LLC
 # All rights reserved.