It would be better if Seq.zip returns ValueTuple

[Xyncgas]

There should be no reason that after getting next item from the iterator to make one extra allocation to store the result, it should just give the result directly to consumer

make vfst vsnd to work with ValueTuple too

[vzarytovskii]

It will be a breaking change, we wont be making it

[brianrourkeboll]

Another option, @Xyncgas, depending on what you're doing, is to use Seq.map2 directly instead:

let zs = (xs, ys) ||> Seq.zip |> Seq.map (fun (x, y) -> x + y)

let zs = (xs, ys) ||> Seq.map2 (fun x y -> x + y)

And it's easy enough to shadow the built-in zip if you like:

module Seq =
    let zip xs ys = (xs, ys) ||> Seq.map2 (fun x y -> struct (x, y))

[Xyncgas]

Thanks :)