diff --git a/Lib/fractions.py b/Lib/fractions.pyindex 49a3f2841a..27c75785fb 100644--- a/Lib/fractions.py+++ b/Lib/fractions.py@@ -315,6 +315,13 @@ def from_decimal(cls, dec):                 (cls.__name__, dec, type(dec).__name__))         return cls(*dec.as_integer_ratio())+    @classmethod+    def _from_pair(cls, num, den):+        obj = super(Fraction, cls).__new__(cls)+        obj._numerator = num+        obj._denominator = den+        return obj+     def is_integer(self):         """Return True if the Fraction is an integer."""         return self._denominator == 1@@ -703,13 +710,13 @@ def _add(a, b):         nb, db = b._numerator, b._denominator         g = math.gcd(da, db)         if g == 1:-            return Fraction(na * db + da * nb, da * db, _normalize=False)+            return Fraction._from_pair(na * db + da * nb, da * db)         s = da // g         t = na * (db // g) + nb * s         g2 = math.gcd(t, g)         if g2 == 1:-            return Fraction(t, s * db, _normalize=False)-        return Fraction(t // g2, s * (db // g2), _normalize=False)+            return Fraction._from_pair(t, s * db)+        return Fraction._from_pair(t // g2, s * (db // g2))      __add__, __radd__ = _operator_fallbacks(_add, operator.add)

$ ./python -m timeit -s 'from fractions import Fraction as Q' -s 'a,b=Q(3,7),Q(5, 8)' -u usec 'a+b'50000 loops, best of 5: 4.4 usec per loop$ ./python -m timeit -s 'from fractions import Fraction as Q' -s 'a,b=Q(3,7)**100,Q(5, 8)**100' -u usec 'a+b'20000 loops, best of 5: 12.6 usec per loop

$ ./python -m timeit -s 'from fractions import Fraction as Q' -s 'a,b=Q(3,7),Q(5, 8)' -u usec 'a+b'50000 loops, best of 5: 6.99 usec per loop$ ./python -m timeit -s 'from fractions import Fraction as Q' -s 'a,b=Q(3,7)**100,Q(5, 8)**100' -u usec 'a+b'20000 loops, best of 5: 15.9 usec per loop