[issue18835] Add aligned memory variants to the suite of PyMem functions/macros

[STINNER Victor]

STINNER Victor added the comment:

It looks like a memory allocator with a given alignment would help numpy, for SIMD instructions:
https://mail.python.org/pipermail/python-dev/2014-April/134092.html
(but "Numpy does not currently use aligned allocation, and it's not clear how important it is")

See also this old discussion on python-dev:
https://mail.python.org/pipermail/python-dev/2010-September/103911.html

Related to this website:
http://mallocv2.wordpress.com/

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<http://bugs.python.org/issue18835>
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