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diff --git a/includes/js/dojox/lang/tests/fun_perf.html b/includes/js/dojox/lang/tests/fun_perf.html
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+++ b/includes/js/dojox/lang/tests/fun_perf.html
@@ -0,0 +1,176 @@
+<html>
+	<head>
+		<title>clocking fun</title>
+		<style type="text/css">
+			@import "../../../dojo/resources/dojo.css";
+		</style>
+		<script type="text/javascript" src="../../../dojo/dojo.js" djConfig="isDebug:true"></script>
+		<script type="text/javascript" src="../functional.js"></script>
+		<script type="text/javascript" src="../functional/sequence.js"></script>
+		<script type="text/javascript" src="../functional/fold.js"></script>
+		<script type="text/javascript">
+			dojo.addOnLoad(function(){
+				var LEN = 2000, ITER = 200, b, e, tests = {},
+					df = dojox.lang.functional,
+					sample = df.repeat(LEN, "+1", 0),
+					add = df.lambda("+"),
+					isOdd = df.lambda("%2");
+					
+				var clock = function(body){
+					var b = new Date();
+					body();
+					var e = new Date();
+					return e.getTime() - b.getTime();	// in ms
+				};
+				
+				var log = function(name, body){
+					b = new Date();
+					var ms = clock(body);
+					e = new Date();
+					console.log(name + ":", ms);
+				};
+
+				// filter
+				tests["raw filter"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						var t = [];
+						for(var j = 0; j < sample.length; ++j){
+							if(isOdd(sample[j])){ t.push(sample[j]); }
+						}
+					}
+				};
+				tests["dojo.filter"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						dojo.filter(sample, isOdd);
+					}
+				};
+				tests["df.filter"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						df.filter(sample, isOdd);
+					}
+				};
+				if(sample.filter){
+					tests["Array.prototype.filter"] = function(){
+						for(var i = 0; i < ITER; ++i){
+							sample.filter(isOdd);
+						}
+					};
+				}
+
+				// map
+				tests["raw map"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						var t = [];
+						for(var j = 0; j < sample.length; ++j){
+							t.push(isOdd(sample[j]));
+						}
+					}
+				};
+				tests["dojo.map"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						dojo.map(sample, isOdd);
+					}
+				};
+				tests["df.map"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						df.map(sample, isOdd);
+					}
+				};
+				if(sample.map){
+					tests["Array.prototype.map"] = function(){
+						for(var i = 0; i < ITER; ++i){
+							sample.map(isOdd);
+						}
+					};
+				}
+
+				// forEach
+				tests["raw forEach"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						for(var j = 0; j < sample.length; ++j){
+							isOdd(sample[j]);
+						}
+					}
+				};
+				tests["dojo.forEach"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						dojo.forEach(sample, isOdd);
+					}
+				};
+				tests["df.forEach"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						df.forEach(sample, isOdd);
+					}
+				};
+				if(sample.forEach){
+					tests["Array.prototype.forEach"] = function(){
+						for(var i = 0; i < ITER; ++i){
+							sample.forEach(isOdd);
+						}
+					};
+				}
+
+				// reduce
+				tests["raw reduce"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						var z = 0;
+						for(var j = 0; j < sample.length; ++j){
+							z = add(z, sample[j]);
+						}
+					}
+				};
+				tests["df.reduce"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						df.reduce(sample, add, 0);
+					}
+				};
+				if(sample.reduce){
+					tests["Array.prototype.reduce"] = function(){
+						for(var i = 0; i < ITER; ++i){
+							sample.reduce(add, 0);
+						}
+					};
+				}
+
+				// reduceRight
+				tests["raw reduceRight"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						var z = 0;
+						for(var j = sample.length - 1; j >= 0; --j){
+							z = add(z, sample[j]);
+						}
+					}
+				};
+				tests["df.reduceRight"] = function(){
+					for(var i = 0; i < ITER; ++i){
+						df.reduceRight(sample, add, 0);
+					}
+				};
+				if(sample.reduceRight){
+					tests["Array.prototype.reduceRight"] = function(){
+						for(var i = 0; i < ITER; ++i){
+							sample.reduceRight(add, 0);
+						}
+					};
+				}
+				
+				var keys = df.keys(tests), i = 0;
+				
+				var doTest = function(){
+					log(keys[i], tests[keys[i]]);
+					++i;
+					if(i < keys.length){
+						setTimeout(doTest, 1);
+					}else{
+						console.log("that's all");
+					}
+				};
+				
+				setTimeout(doTest, 1);
+			});
+		</script>
+	</head>
+	<body>
+		<p>This test is meant to run with Firebug.</p>
+	</body>
+</html>