bench: add benchmark ips for mesuring performance

Author: initdc

Gemfile

@@ -16,3 +16,5 @@ gem "rubocop", "~> 1.21"
 gem "rubocop-config-crystal", "~> 0.0.2"
 
 gem "rubocop-rspec", require: false
+
+gem "benchmark-ips"

Gemfile.lock

@@ -7,6 +7,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.3)
+    benchmark-ips (2.14.0)
     diff-lcs (1.6.2)
     json (2.15.2)
     language_server-protocol (3.17.0.5)
@@ -60,6 +61,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  benchmark-ips
   bundler (~> 2.4)
   rake (~> 13.0)
   rs-result!

bench.rb

@@ -0,0 +1,66 @@
+# frozen_string_literal: true
+
+require "benchmark/ips"
+require_relative "lib/rs/types"
+
+n = 1000
+
+Benchmark.ips do |x|
+  x.config(warmup: 2, time: 1)
+
+  x.report("Some[]") do
+    n.times do
+      Some[Integer] { 0 }
+    end
+  end
+
+  x.report("Some.new") do
+    n.times do
+      Some.new(0)
+    end
+  end
+
+  x.report("None[]") do
+    n.times do
+      None[Integer]
+    end
+  end
+
+  x.report("None.new") do
+    n.times do
+      None.new
+    end
+  end
+
+  x.compare!
+end
+
+Benchmark.ips do |x|
+  x.config(warmup: 2, time: 1)
+
+  x.report("Ok[]") do
+    n.times do
+      Ok[Integer, Integer] { 0 }
+    end
+  end
+
+  x.report("Ok.new") do
+    n.times do
+      Ok.new(0)
+    end
+  end
+
+  x.report("Err[]") do
+    n.times do
+      Err[Integer, Integer] { 0 }
+    end
+  end
+
+  x.report("Err.new") do
+    n.times do
+      Err.new(0)
+    end
+  end
+
+  x.compare!
+end