Merge pull request #7 from ruby2elixir/feature/benchmark

adds a benchfella benchmark

Author: mindreframer

README.md

@@ -26,6 +26,10 @@ iex> AtomicMap.convert(%{ "CamelCase" => [ %{"c" => 1}, %{"c" => 2}] }, safe: fa
 # underscoring can be turned off by passing `underscore: false` to opts
 iex> AtomicMap.convert(%{ "CamelCase" => [ %{"c" => 1}, %{"c" => 2}] }, safe: false, underscore: false )
 %{CamelCase: [%{c: 1}, %{c: 2}]}
+
+# hyphens are replaced
+iex> AtomicMap.convert(%{ "some-key" => [ %{"c" => 1}, %{"c" => 2}] }, safe: false, underscore: true )
+%{some_key: [%{c: 1}, %{c: 2}]}
 ```
 
 
@@ -38,3 +42,8 @@ iex> AtomicMap.convert(%{ "CamelCase" => [ %{"c" => 1}, %{"c" => 2}] }, safe: fa
 
 ## Todo:
   - maybe allow direct conversion to a struct, like Poison does it: as: %SomeStruct{}...
+
+
+## Benchmark
+
+    $ mix bench

bench/basic_bench.exs

@@ -0,0 +1,36 @@
+defmodule BasicBench do
+  use Benchfella
+
+  def macro_underscore(s) do
+    s
+    |> Macro.underscore
+    |> String.replace(~r/-/, "_")
+  end
+
+  def regex_underscore(s) do
+    s
+    |> String.replace(~r/([A-Z]+)([A-Z][a-z])/, "\\1_\\2")
+    |> String.replace(~r/([a-z\d])([A-Z])/, "\\1_\\2")
+    |> String.replace(~r/-/, "_")
+    |> String.downcase
+  end
+
+  @long_string "StringShouldChange-some_stuffStringShouldChange-some_stuffStringShouldChange-some_stuffStringShouldChange-some_stuffStringShouldChange-some_stuff"
+  @short_string "StringShouldChange-some_stuff"
+
+  bench "macro_underscore - long" do
+    @long_string |> macro_underscore
+  end
+
+  bench "regex_underscore - long" do
+    @long_string |> regex_underscore
+  end
+
+  bench "macro_underscore - short" do
+    @short_string |> macro_underscore
+  end
+
+  bench "regex_underscore - short" do
+    @short_string |> regex_underscore
+  end
+end

bench/snapshots/2016-05-04_22-21-57.snapshot

@@ -0,0 +1,6 @@
+duration:1.0;mem stats:false;sys mem stats:false
+module;test;tags;iterations;elapsed
+BasicBench	regex_underscore - short		100000	2667305
+BasicBench	regex_underscore - long		20000	1656602
+BasicBench	macro_underscore - short		100000	1347365
+BasicBench	macro_underscore - long		50000	2556233

mix.exs

@@ -32,7 +32,8 @@ defmodule AtomicMap.Mixfile do
   defp deps do
     [
       {:earmark, "~> 0.2", only: :dev},
-      {:ex_doc, "~> 0.11", only: :dev}
+      {:ex_doc, "~> 0.11", only: :dev},
+      {:benchfella, "0.3.2", only: :dev},
     ]
   end
 

mix.lock

@@ -1,2 +1,3 @@
-%{"earmark": {:hex, :earmark, "0.2.1"},
+%{"benchfella": {:hex, :benchfella, "0.3.2"},
+  "earmark": {:hex, :earmark, "0.2.1"},
   "ex_doc": {:hex, :ex_doc, "0.11.4"}}