[issue22458] Add fractions benchmark

[Stefan Behnel]

Stefan Behnel added the comment:

As I said, where ever exact calculations are needed. I use them for currency calculations, for example, as they inherently avoid rounding errors during the calculations regardless of the relative size of values. They are basically like Decimal but with arbitrary precision.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22458>
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