title: Date.now vs process.hrtime
body: <p>I'm planning to frequently calculate the time difference between set intervals of time.</p>
  
  <p>Performance wise, which of these is better: <strong>Date.now</strong> or <strong>process.hrtime</strong>?</p>
  
  <pre><code>C:\Windows\system32&gt;node
  &gt; process.hrtime()
  [ 70350, 524700467 ]
  &gt; Date.now()
  1510291942731
  </code></pre>
  
  <p>I need the results in seconds.</p>