[Python-Dev] (no subject)

[Greg Ewing]

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