jquery-selector-extension.xml

<?xml version="1.0"?>
<note>
	Because <code><placeholder name="selector"/></code> is a jQuery extension and not part of the CSS specification, queries using <code><placeholder name="selector"/></code> cannot take advantage of the performance boost provided by the native DOM <code>querySelectorAll()</code> method. To achieve the best performance when using <code><placeholder name="selector"/></code> to select elements, first select the elements using a pure CSS selector, then use <a href="http://api.jquery.com/filter/"><code>.filter("<placeholder name="selector"/>")</code></a>.
</note>