Index: Tools/pybench/Numbers.py
===================================================================
--- Tools/pybench/Numbers.py	(revision 67706)
+++ Tools/pybench/Numbers.py	(working copy)
@@ -1,5 +1,47 @@
 from pybench import Test
 
+class BitLength(Test):
+    version = 2.0
+    operations = 20 * 20
+    rounds = 10000
+
+    test_values = [8042, 701, 3608, 48482274, 9209662, 306563951, 14900, 1,
+                   13462, 2674032, 1360580410, 50, 358, 877, 29567507,
+                   92011332, 2301, 235617304, 3365284, 92829]
+
+    def test(self):
+        L = self.test_values
+        for i in xrange(self.rounds):
+            for t in L:
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+                t.bit_length()
+
+    def calibrate(self):
+        L = self.test_values
+        for i in xrange(self.rounds):
+            for t in L:
+                pass
+
+
+
 class CompareIntegers(Test):
 
     version = 2.0