ggcampinho

List = fun () ->
  L = lists:seq(1, 1000),
  lists:map(fun(_) -> ok end, L) ++ lists:map(fun(_) -> {error, "error"} end, L)
end.

Withcase = fun(X) ->
  case X of
    ok ->
      case X of
        ok -> ok;

ggcampinho

defmodule CaseBench do
  use Benchfella

  defp ok_or_error_with_atom do
    Stream.cycle([:ok, {:error, :err}])
    |> Enum.take(1000)
  end

  defp ok_or_error_with_string do
    Stream.cycle([:ok, {:error, "err"}])

ggcampinho

This is my kitchen

ggcampinho

Calculating -------------------------------------
               array    45.561k i/100ms
              regexp    48.843k i/100ms
-------------------------------------------------
               array    711.188k (± 5.8%) i/s -      3.554M
              regexp    797.338k (± 5.9%) i/s -      4.005M

Comparison:
              regexp:   797337.6 i/s
               array:   711187.6 i/s - 1.12x slower