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Re: Speeding up a list construction

>  Another issue I
> found is that with your example code the last item in the list a will
> not be accumulated. Is that intended or one of those index errors which
> I think are the strongest argument to use something like FoldList
> instead of Loops. To really get the same result as your code above you
> would need:

That omission is intentional. The sum of all entries is kept as a
separate variable outside the list asum.

Thanks to all who brought my attention to FoldList. I wasnt aware of
that function, but it does exist in 4.1.  The speedup is about 5:1 on my

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