Add benchmark file

examples/benchmark.rb

@@ -0,0 +1,63 @@
+require 'benchmark'
+
+unless Object.const_defined? :BindingOfCaller
+  $:.unshift File.expand_path '../../lib', __FILE__
+  require 'binding_of_caller'
+  require 'binding_of_caller/version'
+end
+
+
+n = 250000
+
+Benchmark.bm(10) do |x|
+  x.report("#of_caller") do
+    1.upto(n) do
+      1.times do
+        1.times do
+          binding.of_caller(2)
+          binding.of_caller(1)
+        end
+      end
+    end
+  end
+
+  x.report("#frame_count") do
+    1.upto(n) do
+      1.times do
+        1.times do
+          binding.frame_count
+        end
+      end
+    end
+  end
+
+  x.report("#callers") do
+    1.upto(n) do
+      1.times do
+        1.times do
+          binding.callers
+        end
+      end
+    end
+  end
+
+  x.report("#frame_description") do
+    1.upto(n) do
+      1.times do
+        1.times do
+          binding.of_caller(1).frame_description
+        end
+      end
+    end
+  end
+
+  x.report("#frame_type") do
+    1.upto(n) do
+      1.times do
+        1.times do
+          binding.of_caller(1).frame_type
+        end
+      end
+    end
+  end
+end