title: requiring modules in node.js best method
body: <p>When requiring modules in node.js what is the difference when requiring in these two different ways:</p>
  
  <pre><code>var http = require('http');
  var express = require('express');
  </code></pre>
  
  <p>and </p>
  
  <pre><code>var http = require('http'),
      express = require('express');
  </code></pre>
  
  <p>Is there a difference in compilation time? Or something else under the hood? Is the second example at all optimized?</p>
  
  <p>Also, any pointers on where to go to find more information about what is going on under the hood for node.js/javascript code optimization?</p>