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public text v1 · immutable>>> t1 = timeit.Timer(stmt='2**64-1')
>>> t2 = timeit.Timer(stmt='sum(2**x for x in xrange(64))')
>>> t1.timeit()
0.076629877090454102
>>> t2.timeit()
259.40665197372437
>>> t1 = timeit.Timer(stmt='2**64-1')
>>> t2 = timeit.Timer(stmt='sum(2**x for x in xrange(64))')
>>> t1.timeit()
0.076629877090454102
>>> t2.timeit()
259.40665197372437