benchmark_result

Settings:
  duration:      1.0 s

## CacheBench
[20:23:21] 1/4: failed filename lookup
[20:23:30] 2/4: failed term lookup
[20:23:33] 3/4: successful filename lookup
[20:23:34] 4/4: successful term lookup

Finished in 14.44 seconds

## CacheBench
benchmark name              iterations   average time 
failed filename lookup       100000000   0.08 µs/op
successful filename lookup    10000000   0.13 µs/op
failed term lookup               20000   90.67 µs/op
successful term lookup           10000   102.44 µs/op

cache_bench.exs

defmodule CacheBench do
  use Benchfella

  @filename "/opt/app/my_beatiful_application/deps/certifi/priv/cacerts.pem"

  setup_all do
    cache = :ets.new(:set_public_cache, [:set, :public])
    cacerts = :certifi.cacerts()
    :ets.insert(cache, {@filename, :x})
    :ets.insert(cache, {cacerts, :x})
    {:ok, {cache, cacerts}}
  end

  bench "successful filename lookup" do
    {cache, _cacerts} = bench_context
    [{_, :x}] = :ets.lookup(cache, @filename)
  end

  bench "successful term lookup" do
    {cache, cacerts} = bench_context
    [{_, :x}] = :ets.lookup(cache, cacerts)
  end

  bench "failed filename lookup" do
    {cache, _cacerts} = bench_context
    [] = :ets.lookup(cache, <<?a, @filename>>)
  end

  bench "failed term lookup" do
    {cache, cacerts} = bench_context
    [] = :ets.lookup(cache, [?a | cacerts])
  end
end

mix.exs

defmodule CertifiBench.Mixfile do
  use Mix.Project

  def project do
    [
      app: :certifi_bench,
      version: "0.1.0",
      elixir: "~> 1.5",
      start_permanent: Mix.env == :prod,
      deps: deps()
    ]
  end

  # Run "mix help compile.app" to learn about applications.
  def application do
    [
      extra_applications: [:logger]
    ]
  end

  # Run "mix help deps" to learn about dependencies.
  defp deps do
    [
      {:benchfella, "~> 0.3"},
      {:certifi, "~> 2.0"},
    ]
  end
end

mix.lock

%{"benchfella": {:hex, :benchfella, "0.3.5", "b2122c234117b3f91ed7b43b6e915e19e1ab216971154acd0a80ce0e9b8c05f5", [], [], "hexpm"},
  "certifi": {:hex, :certifi, "2.0.0", "a0c0e475107135f76b8c1d5bc7efb33cd3815cb3cf3dea7aefdd174dabead064", [], [], "hexpm"}}