Get a basic benchmark runner going.

benchmark/fib.rb

@@ -0,0 +1,13 @@
+def fib(n)
+  if n < 2 then
+    n
+  else
+    fib(n - 1) + fib(n - 2)
+  end
+end
+
+start = Time.now
+for i in 0...5
+  puts fib(30)
+end
+puts "elapsed: " + (Time.now - start).to_s