title: Cloning: what's the fastest alternative to JSON.parse(JSON.stringify(x))?
body: <p>What's the fastest alternative to </p>
  
  <pre><code>JSON.parse(JSON.stringify(x))
  </code></pre>
  
  <p>There must be a nicer/built-in way to perform a deep clone on objects/arrays, but I haven't found it yet.</p>
  
  <p>Any ideas?</p>