diff --git a/tests/speed/string_format.html b/tests/speed/string_format.html
new file mode 100644
index 0000000000..39146b7ed8
--- /dev/null
+++ b/tests/speed/string_format.html
@@ -0,0 +1,29 @@
+<html>
+<head>
+<script src="../../lib/OpenLayers.js"></script>
+<script>
+
+function stringformat() {
+  var string = OpenLayers.String.format("${abc} 123 ${def}", {'abc': 456, 'def': 789}) 
+}    
+function run(x) {
+    var date = new Date();
+    for (var i = 0; i < x; i++) {
+        stringformat();
+    }
+    var elapsed = (new Date() - date);
+    return elapsed;
+}
+
+function show_time(x) 
+{
+    var t = run(x);
+    document.getElementById("out").innerHTML = t + "ms  for " + x + " runs";
+}
+</script>
+</head>
+<body>
+<a onclick="javascript:show_time(100000); return false" href="#">Run</a>
+<div id="out"></div>
+</body>
+</html>
