Python performance the easy(ish) way

Very nice! But let's say we're summing a LOT of numbers, like 0 through 10**8 (that's 100,000,000). >>> %timeit sumrange(10**2) 1000000 loops, best of 3: 1.42 us per loop >>> %timeit sumrange(10**8) 1 loops, best of 3: 1.13 s per loop >>> %timeit sumrange(10**10) 1 loops, best of 3: 701 s per loop