   """
   @impl true
   @spec format(Suite.t(), map) :: [any]
-  def format(%Suite{scenarios: scenarios, configuration: config}, options) do
+  def format(%Suite{scenarios: scenarios, configuration: config}, options \\ %{}) do
     if Map.has_key?(options, :unit_scaling), do: warn_unit_scaling()
 
     config =

      flat_map           2.40 K      417.00 μs     ±9.40%      411.45 μs      715.21 μs
      map.flatten        1.24 K      806.89 μs    ±16.62%      768.02 μs     1170.67 μs

      Comparison: 
      flat_map           2.40 K
      map.flatten        1.24 K - 1.93x slower



  alias Benchee.Suite
  alias Benchee.Formatters.Console.{Memory, RunTime}

  @doc """
  Formats the benchmark statistics to a report suitable for output on the CLI.
