[Python-Dev] Object free lists
bob at redivi.com
Tue Jun 15 22:58:43 EDT 2004
On Jun 15, 2004, at 10:52 PM, Tim Peters wrote:
> [Eric Huss]
>> The only problem I see with using pymalloc is that the objects won't
>> stored in memory in such a compact way.
> The difference can be large, because pymalloc aligns to 8-byte
> So, e.g., on most boxes today a Python int object consumes 12 bytes,
> would consume 16 if allocated with pymalloc. That's a 33% boost, and
> can be significant for apps hanging on to lots of ints.
> OTOH, on most boxes there would be no real size difference for float
The implementation of malloc in OS X always returns pointers aligned to
16-byte boundaries, so that the buffers can be reasonably used by
AltiVec instructions. Would there be a difference in this case? :)
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