x64 speed

Robin Becker robin at reportlab.com
Thu Feb 5 11:12:15 CET 2009


Martin v. Löwis wrote:
>> Is it the
>> x64 working faster at its design sizes
> 
> Another guess (still from the darkness of not having received the
> slightest clue what the test actually does): if it creates integers
> in range(2**32, 2**64), then they fit into a Python int on AMD64-Linux,
> but require a Python long on 32-bit Windows; long operations are much
> slower than int operations.
> 
......
I don't think we're doing a lot of bignum arithmetic, some masking operations 
etc etc.

-- 
Robin Becker




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