On 26.11.14 02:46, Dave Angel wrote:
Unfortunately, for many values, the version of the function with >>1 is slower. It's only when the argument is bigger than 10**40 that it's as much as 1% faster. But it's true that for really large values, it's quicker.
Note that this path is used only for values above 2**53 (about 10**16). For all tested values from 10**16 to 10**40 the difference between two versions is not larger than 1% (in one or other direction). But the difference between different runs of the benchmark for the same version vary about 1%. So the difference between versions in this range doesn't matter.
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