title: array.forEach running faster than native iteration? How?
body: <p><a href="http://jsperf.com/testing-foreach-vs-for-loop" rel="noreferrer">http://jsperf.com/testing-foreach-vs-for-loop</a></p>
  
  <p>It was my understanding that Test Case 2 should run more slowly than Test Case 1 -- I wanted to see how much more slowly. Imagine my surprise when I see it runs more quickly!</p>
  
  <p>What's going on here? Behind the scenes optimizaiton? Or is .forEach cleaner AND faster?</p>
  
  <p>Testing in Chrome 18.0.1025.142 32-bit on Windows Server 2008 R2 / 7 64-bit</p>