Bench pattern match with functions

bench.exs

defmodule Foo do
  Enum.each(1..100, fn i ->
    def field(unquote(:"foo#{i}")) do
      "field #{unquote(i)}"
    end

    def unquote(:"field_foo#{i}")() do
      "field #{unquote(i)}"
    end
  end)
end

Benchee.run(
  %{
    "pattern match" => fn ->
      Foo.field(:foo1)
      Foo.field(:foo2)
      Foo.field(:foo3)
      Foo.field(:foo4)
      Foo.field(:foo5)
      Foo.field(:foo6)
      Foo.field(:foo7)
      Foo.field(:foo8)
      Foo.field(:foo9)
      Foo.field(:foo10)
      Foo.field(:foo11)
      Foo.field(:foo12)
      Foo.field(:foo13)
      Foo.field(:foo14)
      Foo.field(:foo15)
      Foo.field(:foo16)
      Foo.field(:foo17)
      Foo.field(:foo18)
      Foo.field(:foo19)
      Foo.field(:foo20)
      Foo.field(:foo21)
      Foo.field(:foo22)
      Foo.field(:foo23)
      Foo.field(:foo24)
      Foo.field(:foo25)
      Foo.field(:foo26)
      Foo.field(:foo27)
      Foo.field(:foo28)
      Foo.field(:foo29)
      Foo.field(:foo30)
      Foo.field(:foo31)
      Foo.field(:foo32)
      Foo.field(:foo33)
      Foo.field(:foo34)
      Foo.field(:foo35)
      Foo.field(:foo36)
      Foo.field(:foo37)
      Foo.field(:foo38)
      Foo.field(:foo39)
      Foo.field(:foo40)
      Foo.field(:foo41)
      Foo.field(:foo42)
      Foo.field(:foo43)
      Foo.field(:foo44)
      Foo.field(:foo45)
      Foo.field(:foo46)
      Foo.field(:foo47)
      Foo.field(:foo48)
      Foo.field(:foo49)
      Foo.field(:foo50)
      Foo.field(:foo51)
      Foo.field(:foo52)
      Foo.field(:foo53)
      Foo.field(:foo54)
      Foo.field(:foo55)
      Foo.field(:foo56)
      Foo.field(:foo57)
      Foo.field(:foo58)
      Foo.field(:foo59)
      Foo.field(:foo60)
      Foo.field(:foo61)
      Foo.field(:foo62)
      Foo.field(:foo63)
      Foo.field(:foo64)
      Foo.field(:foo65)
      Foo.field(:foo66)
      Foo.field(:foo67)
      Foo.field(:foo68)
      Foo.field(:foo69)
      Foo.field(:foo70)
      Foo.field(:foo71)
      Foo.field(:foo72)
      Foo.field(:foo73)
      Foo.field(:foo74)
      Foo.field(:foo75)
      Foo.field(:foo76)
      Foo.field(:foo77)
      Foo.field(:foo78)
      Foo.field(:foo79)
      Foo.field(:foo80)
      Foo.field(:foo81)
      Foo.field(:foo82)
      Foo.field(:foo83)
      Foo.field(:foo84)
      Foo.field(:foo85)
      Foo.field(:foo86)
      Foo.field(:foo87)
      Foo.field(:foo88)
      Foo.field(:foo89)
      Foo.field(:foo90)
      Foo.field(:foo91)
      Foo.field(:foo92)
      Foo.field(:foo93)
      Foo.field(:foo94)
      Foo.field(:foo95)
      Foo.field(:foo96)
      Foo.field(:foo97)
      Foo.field(:foo98)
      Foo.field(:foo99)
      Foo.field(:foo100)
    end,
    "function" => fn ->
      Foo.field_foo1
      Foo.field_foo2
      Foo.field_foo3
      Foo.field_foo4
      Foo.field_foo5
      Foo.field_foo6
      Foo.field_foo7
      Foo.field_foo8
      Foo.field_foo9
      Foo.field_foo10
      Foo.field_foo11
      Foo.field_foo12
      Foo.field_foo13
      Foo.field_foo14
      Foo.field_foo15
      Foo.field_foo16
      Foo.field_foo17
      Foo.field_foo18
      Foo.field_foo19
      Foo.field_foo20
      Foo.field_foo21
      Foo.field_foo22
      Foo.field_foo23
      Foo.field_foo24
      Foo.field_foo25
      Foo.field_foo26
      Foo.field_foo27
      Foo.field_foo28
      Foo.field_foo29
      Foo.field_foo30
      Foo.field_foo31
      Foo.field_foo32
      Foo.field_foo33
      Foo.field_foo34
      Foo.field_foo35
      Foo.field_foo36
      Foo.field_foo37
      Foo.field_foo38
      Foo.field_foo39
      Foo.field_foo40
      Foo.field_foo41
      Foo.field_foo42
      Foo.field_foo43
      Foo.field_foo44
      Foo.field_foo45
      Foo.field_foo46
      Foo.field_foo47
      Foo.field_foo48
      Foo.field_foo49
      Foo.field_foo50
      Foo.field_foo51
      Foo.field_foo52
      Foo.field_foo53
      Foo.field_foo54
      Foo.field_foo55
      Foo.field_foo56
      Foo.field_foo57
      Foo.field_foo58
      Foo.field_foo59
      Foo.field_foo60
      Foo.field_foo61
      Foo.field_foo62
      Foo.field_foo63
      Foo.field_foo64
      Foo.field_foo65
      Foo.field_foo66
      Foo.field_foo67
      Foo.field_foo68
      Foo.field_foo69
      Foo.field_foo70
      Foo.field_foo71
      Foo.field_foo72
      Foo.field_foo73
      Foo.field_foo74
      Foo.field_foo75
      Foo.field_foo76
      Foo.field_foo77
      Foo.field_foo78
      Foo.field_foo79
      Foo.field_foo80
      Foo.field_foo81
      Foo.field_foo82
      Foo.field_foo83
      Foo.field_foo84
      Foo.field_foo85
      Foo.field_foo86
      Foo.field_foo87
      Foo.field_foo88
      Foo.field_foo89
      Foo.field_foo90
      Foo.field_foo91
      Foo.field_foo92
      Foo.field_foo93
      Foo.field_foo94
      Foo.field_foo95
      Foo.field_foo96
      Foo.field_foo97
      Foo.field_foo98
      Foo.field_foo99
      Foo.field_foo100
    end
  },
  time: 30,
  memory_time: 2
)

result.txt

mix run bench_pattern.exs
Operating System: macOS
CPU Information: Intel(R) Core(TM) i7-8850H CPU @ 2.60GHz
Number of Available Cores: 12
Available memory: 16 GB
Elixir 1.8.2
Erlang 22.0.5

Benchmark suite executing with the following configuration:
warmup: 2 s
time: 20 s
memory time: 2 s
parallel: 1
inputs: none specified
Estimated total run time: 48 s


Benchmarking function...
Benchmarking pattern match...

Name                    ips        average  deviation         median         99th %
function            98.19 K       10.18 μs   ±220.74%          10 μs          23 μs
pattern match       79.71 K       12.55 μs   ±152.16%          12 μs          24 μs

Comparison:
function            98.19 K
pattern match       79.71 K - 1.23x slower

Memory usage statistics:

Name             Memory usage
function              4.70 KB
pattern match         4.70 KB - 1.00x memory usage

**All measurements for memory usage were the same**