title: PHP abstract class vs interface (performance)
body: <p>In PHP 5 and later what's faster - an <code>interface</code> or <code>abstract class</code> ?</p>
  
  <pre><code>abstract class MyPluginModel {
  </code></pre>
  
  <p>vs</p>
  
  <pre><code>interface MyPluginModel {
  </code></pre>
  
  <p>Any ideas how they compare in terms of memory and time performance?</p>