title: CSS white or transparent background-color for div on white background?
body: <p>I work in front end and set CSS background using the shorthand notation very often. I was wondering for a div with a background image whose parent div has a white background - should the child have background-color white or transparent ? Which is better for <em>performance</em>?</p>
  
  <p>ie:</p>
  
  <pre><code>&lt;div id='parent' style='background:white;'&gt;
      &lt;div id='child' style='background:WHITE image no-repeat center center;'&gt;&lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p><strong>OR</strong></p>
  
  <pre><code>&lt;div id='parent' style='background:white;'&gt;
      &lt;div id='child' style='background:TRANSPARENT image no-repeat center center;'&gt;&lt;/div&gt;
  &lt;/div&gt;
  </code></pre>