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Tue Oct 3 14:30:35 CEST 2006 · https://mail.python.org/pipermail/python-dev/2006-October/069157.html

Nick Maclaren schrieb:
>> The total count of floating point numbers allocated at this point is 985794.
>> Without the reuse, they would be 1317145, so this is a saving of 25%, and
>> of 5Mb.
> 
> And, if you optimised just 0.0, you would get 60% of that saving at
> a small fraction of the cost and considerably greater generality.

As Michael Hudson observed, this is difficult to implement, though:
You can't distinguish between -0.0 and +0.0 easily, yet you should.

Regards,
Martin

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[Python-Dev] Caching float(0.0)