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Performance optimizations on Fraction's constructor.

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./python.exe -m timeit -s 'from fractions import Fraction' 'Fraction(3)`
31.7 usec/loop -> 9.2 usec/loop

  ./python.exe -m timeit -s 'from fractions import Fraction' 'Fraction(3, 2)'`
27.7 usec/loop -> 9.32 usec/loop

  ./python.exe -m timeit -s 'from fractions import Fraction; f = Fraction(3, 2)' 'Fraction(f)'
31.9 usec/loop -> 14.3 usec/loop
This commit is contained in:
Jeffrey Yasskin 2008-02-14 06:12:24 +00:00
parent abe3237187
commit 1c214d6c94
2 changed files with 13 additions and 15 deletions
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8
Lib/test/test_fractions.py
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@ -62,11 +62,11 @@ class FractionTest(unittest.TestCase):
self.assertRaisesMessage(ZeroDivisionError, "Fraction(12, 0)",
F, 12, 0)
self.assertRaises(TypeError, F, 1.5)
self.assertRaises(TypeError, F, 1.5 + 3j)
self.assertRaises(AttributeError, F, 1.5)
self.assertRaises(AttributeError, F, 1.5 + 3j)
self.assertRaises(TypeError, F, F(1, 2), 3)
self.assertRaises(TypeError, F, "3/2", 3)
self.assertRaises(AttributeError, F, F(1, 2), 3)
self.assertRaises(AttributeError, F, "3/2", 3)
def testFromString(self):
self.assertEquals((5, 1), _components(F("5")))