title: Faster Alternative to Math.sqrt()
body: <p>Are there any alternatives to using <code>Math.sqrt()</code> to get the square root of an unknown value?</p>
  
  <p>For example:</p>
  
  <pre><code>var random  = (Math.random() * (999 - 1)) + 1;
  var sqrt = Math.sqrt(random);
  </code></pre>
  
  <p>I've heard that using <code>Math.sqrt()</code> to get the square root of a number is a very slow operation, I'm just wondering if there are any faster ways I can get the square root of a random number. Any help with this would be greatly appreciated.</p>