[issue12450] Use the Grisu algorithms to convert floats to strings

[Bart Robinson]

Bart Robinson added the comment:

Six years later, I have accepted Amaury's challenge and created an extension module that uses the double-conversion library to generate repr's for floats: https://pypi.python.org/pypi/frepr

My rudimentary performance testing gives something like 8X speedup compared to the standard float_repr().

Scrutiny and suggestions welcome...

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nosy: +Bart Robinson

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