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parallel for/while
f#parallel

Basically, I want to do a parallel in-place map. pwhile or pfor would do the trick. (I think these are in the Task Parallel Library, but I'd prefer not to add that dependency.)

I want to do something like this, except without the ending

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unit array

Seq.init 10 (fun j -> async{ myArr.[j] <- fromArr.[j] |> mapFun} ) |> Async.Parallel |> Async.RunSynchronously
.

I found the Async.Ignore function. Is this:

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Seq.init 10 (fun j -> async{ myArr.[j] <- fromArr.[j] |> mapFun} ) |> Async.Parallel |> Async.Ignore |> Async.RunSynchronously

preferable to this:

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Seq.init 10 (fun j -> async{ myArr.[j] <- fromArr.[j] |> mapFun} ) |> Async.Parallel  |> Async.RunSynchronously |> ignore

(i.e. does it avoid allocating the unit array)

By on 1/28/2010 3:23 PM ()

I doubt it; I think that any execution of Async.Parallel will create the array. But if you are doing enough work that 'async' is useful, then ten times out of ten, allocating one single extra short-lived array object is not going to matter.

By on 1/28/2010 10:12 PM ()

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