Figuring out the most efficient javascript method for autocomplete

jqueryui-auto.html

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/themes/base/jquery-ui.css" type="text/css" media="all" />
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js" type="text/javascript"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/jquery-ui.min.js" type="text/javascript"></script>

<meta charset="utf-8">
   <script>
      $(function() {
         var availableTags = [
	    "ActionScript",
	    "AppleScript",
	    "Asp",
	    "BASIC",
	    "C",
	    "C++",
	    "Clojure",
	    "COBOL",
	    "ColdFusion",
	    "Erlang",
	    "Fortran",
	    "Groovy",
	    "Haskell",
	    "Java",
	    "JavaScript",
	    "Lisp",
	    "Perl",
	    "PHP",
	    "Python",
	    "Ruby",
	    "Scala",
	    "Scheme"
	];
	$( "#tags" ).autocomplete({
	   source: availableTags
	});
   });
</script>

<div class="demo">
   <div class="ui-widget">
	<label for="tags">Tags: </label>
	<input id="tags" />
   </div>
</div>

jquery ui site - http://jqueryui.com/demos/autocomplete/#default
yui2 autocomplete - http://developer.yahoo.com/yui/autocomplete/

Question - is this the most efficient, easy to setup, and use autocomplete method out there?