random_bench.exs

defmodule Random do
  use Benchfella

  @list ~w(a b c d e f g h i j k l m n o p)
  @tuple List.to_tuple(@list)

  bench "tuple" do
    _ = elem(@tuple, :random.uniform(16) - 1)
    :ok
  end

  bench "list" do
    _ = Enum.random(@list)
    :ok
  end
end

# ## Random
# tuple    10000000   0.35 µs/op
# list       500000   8.76 µs/op