Stefan Behnel added the comment:

> So this benchmark cannot be used to show the superiority of exact fractions.

I don't see how a benchmark would be a way to show that. It's certainly not the 
goal of this benchmark to show that one is computationally better than the 
other. But if a benchmark for one part of Python allows a direct, reasonable 
speed comparison with another, why would you object to make use of that?


> is the purpose of this benchmark to show that fractions are slow and generate 
> interest in changing the situation?

There have been a couple of attempts to make them faster already. The speed 
improvements in Py3.5 and 3.6 directly result from those changes. Thus, making 
these improvements visible and comparable across Python versions and different 
implementations is one of the goals of this benchmark.

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<http://bugs.python.org/issue22458>
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