text: Q:
  
  Jquery traversing and using selectors
  
  I'm reading a book and they show a couple of examples of how to select elements on the DOM, but they advise to always use Jquery trasversing methods over the selectors, for example if you have a list inside a div instead of using
  $("#myList > li")
  
  You should use
  $("#myList").children("li")
  
  Most of the time I use the first over the latter, the author says the 2nd is prefered and more efficient but he does not address why, can anyone explain the reason behind this?
  
  A:
  
  I think the difference in performance in that particular case comes down to this:
  document.querySelectorAll('#myList > li');
  // VS
  document.getElementById('myList').children;
  
  And the performance test here: http://jsperf.com/ae-d2-56-2a-e2-36-a3-d3-52-74
  jQuery might check to see if it's a li given the selector but that's still going to be faster than querySelectorAll or Sizzle.
  
  