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Showing content from http://mail.python.org/pipermail/python-dev/2006-August/068267.html below:

[Python-Dev] Type of range object members

[Python-Dev] Type of range object members [Python-Dev] Type of range object members"Martin v. Löwis" martin at v.loewis.de
Wed Aug 16 00:20:23 CEST 2006
Guido van Rossum schrieb:
> From the Python *user*'s perspective, yes, as much as possible. But
> I'm still playing with the thought of having two implementation types,
> since otherwise we'd have to devote 4 bytes (8 on a 64-bit platform)
> to the single *bit* telling the difference between the two internal
> representations.

We had this discussion before; if you use ob_size==0 to indicate
that it's an int, this space isn't needed in a long int. On a 32-bit
platform, the size of an int would go up from 12 to 16; if we stop
using a special-cased allocator (which we should (*)), there isn't
any space increase on such a platform. On a 64-bit platform, the
size of an int would go up from 24 bytes to 32 bytes.

Regards,
Martin

(*) people have complained that the memory allocated for a large
number of ints isn't ever reused. They consumed it by passing
range() some large argument.
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