Add block vs ensure benchmark

block-ensure/example.rb

@@ -0,0 +1,29 @@
+#!/usr/bin/env ruby
+
+require 'benchmark'
+
+class Example
+  def initialize
+    @mutex = Mutex.new
+  end
+
+  def using_block
+    @mutex.synchronize do
+
+    end
+  end
+
+  def using_ensure
+    @mutex.lock
+  ensure
+    @mutex.unlock
+  end
+end
+
+Benchmark.bm(12) do |x|
+  ex = Example.new
+  n = 10_000_000
+
+  x.report('block') { n.times { ex.using_block } }
+  x.report('ensure') { n.times { ex.using_ensure } }
+end