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Sun Jul 26 01:28:08 CEST 2009 · https://mail.python.org/pipermail/python-dev/2009-July/090864.html

>    Maximum alignment currently on x86 is 16 bytes for SSE vector
> types. Next year AVX will add 32 byte types and while they are
> supposed to work OK with 16 byte alignment, performance will be better
> with 32 byte alignment.

That doesn't really matter. What matters is the platform's ABI, i.e.
what the maximum alignment is that the compiler gives, and what the
alignment of a malloc() result is. That is unlikely to change even
if x86 evolves.

Regards,
Martin

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[Python-Dev] mingw32 and gc-header weirdness