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by Veedrac 2897 days ago
That's not what I recall. Having a quick reskim, I don't believe they can handle the shared mutability in `F(S(X), X)`, so would end up duplicating the work to generate the elements of `X`. This problem looks unavoidable to me; if you are computing `f(x[n], x[2*n])` you need both points in memory simultaneously.