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Wed Feb 11 06:34:15 CET 2015 · https://mail.python.org/pipermail/python-dev/2015-February/138149.html

Victor Stinner wrote:
> Le 10 févr. 2015 06:48, "Greg Ewing" <greg.ewing at canterbury.ac.nz 
> <mailto:greg.ewing at canterbury.ac.nz>> a écrit :
>  > It could potentially be a little more efficient by
>  > eliminating the construction of an intermediate list.
> 
> Is it the case in the implementation? If it has to create a temporary 
> list/tuple, I will prefer to not use it.

The function call machinery will create a new tuple for
the positional args in any case. But if you manually
combine your * args into a tuple before calling, there
are *two* tuple allocations being done. Passing all the
* args directly into the call would allow one of them
to be avoided.

Similarly for dicts and ** args.

-- 
Greg

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