TickCount has 1 millisecond accuray and it's actually milliseconds, which is what tipped me off to the low numbers. It actually takes 140 milliseconds to execut

TickCount has 1 millisecond accuray and it's actually milliseconds, which is what tipped me off to the low numbers. It actually takes 140 milliseconds to execute. I redid the code to not use Seqs and now it's down to 15 ms. // Learn more about F# at http://fsharp.net open System let consume x = () let start = System.Environment.TickCount let arr = [| 1..4 |] for i = 1 to 100000 do arr |> Array.filter (fun y -> (y % 2) = 0) |> consume let endTime = System.Environment.TickCount printf "%d milliseconds" (endTime - start)