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On Fri, 18 Dec 2009, Fabien wrote:
> There's a shortcut for the most common case where there's only one argument.
> For cases with several tables and/or explicit boundaries, it keeps as much
> stuff out of the loop as possible. The only significant additional cost in
> loop is the accumulation of function arguments in a list, which is the
> equivalent of a just-in-time zip. I don't see a way to get rid of it without
> using C.
With the scope of a standard library I don't see a problem to involve C
code in order to achieve the functionality.