ex

defmodule Calls do
    def val1, do: "val1"
    def val2, do: "val2"
end

defmodule Constants do
  defmacro c name, value do
    quote do
      defmacro unquote(name) do
        unquote(value)
      end
    end
  end
end

defmodule Constants.Vals do
  require Constants
  
  Constants.c val1, "val1"
  Constants.c val2, "val2"
end

defmodule Profile do
  require Constants.Vals
  
  def match v do
    case v do
      Constants.Vals.val1 -> "matched val1"
      Constants.Vals.val2 -> "matched val2"
      _ -> "no match"
    end
  end
  
  def matchcall v do
    if (v == Calls.val1) do
      "matched val1"
    else
      if (v == Calls.val2) do 
        "matched val2"
      else
        "no match"
      end
    end
  end
  
  def trymatch do
    match :nil
    match "val1"
    match "val2"
    match "val3"
  end
  
  def trymatchcall do
    matchcall :nil
    matchcall "val1"
    matchcall "val2"
    matchcall "val3"
  end
end

==============================================================================================

mix profile.fprof -e Profile.trymatchcall
Reading trace data...

End of trace!
Processing data...
Creating output...
Done!

                                                                   CNT    ACC (ms)    OWN (ms)
Total                                                               23       0.038       0.037
:fprof.apply_start_stop/4                                            0       0.038       0.002
anonymous fn/0 in :elixir_compiler_1.__FILE__/1                      1       0.035       0.001
Profile.trymatchcall/0                                               1       0.034       0.004
Profile.matchcall/1                                                  4       0.030       0.011
:error_handler.undefined_function/3                                  1       0.013       0.003
:error_handler.ensure_loaded/1                                       1       0.008       0.002
:code.ensure_loaded/1                                                1       0.005       0.001
:code.call/1                                                         1       0.004       0.001
Calls.val1/0                                                         4       0.004       0.004
:code_server.call/2                                                  1       0.003       0.002
Calls.val2/0                                                         3       0.003       0.003
:fprof."-apply_start_stop/4-after$^0/0-0-"/3                         1       0.001       0.001
:erlang.whereis/1                                                    1       0.001       0.001
:erlang.function_exported/3                                          1       0.001       0.001
:suspend                                                             2       0.001       0.000
:undefined                                                           0       0.000       0.000

==============================================================================================

mix profile.fprof -e Profile.trymatch
Reading trace data...

End of trace!
Processing data...
Creating output...
Done!

                                                                   CNT    ACC (ms)    OWN (ms)
Total                                                                8       0.012       0.012
:fprof.apply_start_stop/4                                            0       0.012       0.002
anonymous fn/0 in :elixir_compiler_1.__FILE__/1                      1       0.009       0.001
Profile.trymatch/0                                                   1       0.008       0.004
Profile.match/1                                                      4       0.004       0.004
:fprof."-apply_start_stop/4-after$^0/0-0-"/3                         1       0.001       0.001
:undefined                                                           0       0.000       0.000
:suspend                                                             1       0.000       0.000