Async execution in elixir

run_async.exs

defmodule Run do
  def in_parallel(n) do
    1..n
    |> Enum.map(fn(i) ->
      Task.async(fn -> :timer.sleep(i * 1_000) end)
    end)
    |> Enum.map(&Task.await/1)
  end

  def serial(n) do
    Enum.map(1..n, fn(i) ->
      :timer.sleep(i * 1_000)
    end)
  end
end

# It takes round 55s to run serially
Run.serial(10)

# Only 10s to run in parallel
Run.in_parallel(10)