PHP include vs include_once (speed)
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/186338/why-is-require-once-so-bad-to-use">Why is require_once so bad to use?</a>  </p>
</blockquote>



<p>I've read somewhere that the <code>include_once</code> and <code>require_once</code> statements in PHP were slower than their non-once counterparts. Is this a significant slowdown? Has there been any testing or studies of this, and has it changed in recent versions of PHP?</p>
