Surprise using the 'is' operator

[tobiah]

>> I don't pretend to understand the reasons for all of this,
>> but if it is possible to use the same integer object whenever
>> it is referenced, then why should there be a limit on range?
> 
> Preallocating all the 4 billion 4-byte ints would overfill the memory of 
> most machines ;-)

Sure, I just meant that once a given integer was used,
it should be referenced the next time that value is
required.  As this thread exposed however, there is
a trade off for lookup time.

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