diff --git a/timeit_test.py b/timeit_test.py
new file mode 100644
index 0000000..31bb93e
--- /dev/null
+++ b/timeit_test.py
@@ -0,0 +1,24 @@
+# Sebastian Raschka, 03/2014
+# comparing string formating: %s and .format()
+
+import timeit
+
+format_res = timeit.timeit("['{}'.format(i) for i in range(10000)]", number=1000)
+
+binaryop_res = timeit.timeit("['%s' %i for i in range(10000)]", number=1000)
+
+print('{}: {}\n{}: {}'.format('format()', format_res, '%s', binaryop_res))
+
+################################
+# On my machine
+################################
+#
+# Python 3.4.0
+# MacOS X 10.9.2
+# 2.5 GHz Intel Core i5
+# 4 GB 1600 Mhz DDR3
+#
+################################
+# format(): 2.815331667999999
+# %s: 1.630353775999538
+################################