--- Lib/fractions.py	2014-08-22 18:59:30.623831217 +0200
+++ Lib/fractions.py	2014-09-22 20:39:37.772830118 +0200
@@ -153,6 +153,9 @@
                 raise TypeError("argument should be a string "
                                 "or a Rational instance")
 
+        elif isinstance(numerator, int) and isinstance(denominator, int):
+            pass  # *very* normal case
+
         elif (isinstance(numerator, numbers.Rational) and
             isinstance(denominator, numbers.Rational)):
             numerator, denominator = (