[Python-Dev] Caching float(0.0)

[skip at pobox.com]

    skip> Most definitely.  I just posted what I came up with in about two
    skip> minutes.  I'll add some code to track the high water mark as well
    skip> and report back.

Using the smallest change I could get away with, I came up with these
allocation figures (same as before):

    -1.0: 29048
     0.0: 524340
    +1.0: 91560
    rest: 1753479
    whole numbers -10.0 to 10.0: 1151543

and these max ref counts:

    -1.0: 16
     0.0: 136
    +1.0: 161
    rest: 1
    whole numbers -10.0 to 10.0: 161

When I have a couple more minutes I'll just implement a cache for whole
numbers between -10.0 and 10.0 and test that whole range of values right.

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