diff --git a/demo/performance.html b/demo/performance.html
deleted file mode 100644
index af3238a..0000000
--- a/demo/performance.html
+++ /dev/null
@@ -1,139 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-
-<head>
-    <meta charset="utf-8">
-    <meta http-equiv="X-UA-Compatible" content="IE=edge">
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <meta name="description" content="KUTE.js is a minimal Javascript animation engine">
-    <meta name="keywords" content="kute,kute.js,Javascript,Native Javascript,vanilla javascript,jQuery">
-    <meta name="author" content="dnp_theme">
-    <link rel="shortcut icon" href="./assets/img/favicon.png"> <!-- TO DO -->
-
-    <title>KUTE.js | Performance Testing Page</title>
-    <link href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet">	
-		<style>
-      body {background-color: #2e2e2e; color: #999; font-size: 12px; font-family: Helvetica, Arial, Helvetica, sans-serif;}
-      a {color:#ffd626; text-decoration: none}
-      a:hover,a:focus {color:#fff;}
-			#container {
-				  width: 200px; /*height: 200px;*/
-				  margin: 0 auto;
-				  position: relative;
-
-				  display: block;
-			  }
-			  
-			  .line {
-				  width: 200px;
-				  height: 2px;
-				  position: absolute;  
-          transform: translate3d(0px, 0px, 0px);  		
-			  }
-        .box { height: 200px }
-        #info {position: absolute; top: 0; left: 0; width: 400px;}
-        .hack { transform: translate3d(0px,0px,0px); }
-        .padding {padding: 20px}
-        .btn-group { margin-bottom: 15px; }
-        .btn {font-size: 13px; }
-		</style>
-
-</head>
-
-<body>
-  
-<div id="info" class="padding">
-    <p><a class="back" href="index.html">Back to KUTE.js</a></p>
-    <p>Engine  </p>     
-        <span id="engine" class="btn-group">
-          <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-expanded="false" tabindex="0">Select <span class="caret"></span></button>
-          <ul class="dropdown-menu" role="menu">
-            <li><a id="kute" href="#">KUTE</a></li>
-            <li><a id="gsap" href="#">GSAP</a></li>
-            <li><a id="tween" href="#">Tween.js</a></li>
-          </ul>
-        </span>
-    
-    <p>Property </p>  
-        <span id="property" class="btn-group">
-          <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-expanded="false" tabindex="0">Select <span class="caret"></span></button>
-          <ul class="dropdown-menu" role="menu">
-            <li><a id="left" href="#">left</a></li>
-            <li><a id="translateX" href="#">translateX</a></li>
-          </ul>
-        </span>
-      
-      
-      <p>Repeat   </p> 
-        <span id="repeat" class="btn-group">
-          <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-expanded="false" tabindex="0">Select <span class="caret"></span></button>
-          <ul class="dropdown-menu" role="menu">
-            <li><a id="5" href="#">5</a></li>
-            <li><a id="10" href="#">10</a></li>
-            <li><a id="15" href="#">15</a></li>
-            <li><a id="20" href="#">20</a></li>
-          </ul>
-        </span>
-      
-        
-      <p>How many elements to animate:</p> 
-        <span id="count" class="btn-group">
-            <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-expanded="false" tabindex="0">Select <span class="caret"></span></button>
-            <ul class="dropdown-menu" role="menu">
-              <li><a id="100" href="#">100</a></li>
-              <li><a id="200" href="#">200</a></li>
-              <li><a id="300" href="#">300</a></li>
-              <li><a id="400" href="#">400</a></li>
-              <li><a id="500" href="#">500</a></li>
-              <li><a id="600" href="#">600</a></li>
-              <li><a id="700" href="#">700</a></li>
-              <li><a id="800" href="#">800</a></li>
-              <li><a id="900" href="#">900</a></li>
-              <li><a id="1000" href="#">1000</a></li>
-            </ul>
-        </span>
-          
-        
-        <div id="hack" style="display: none">
-          <p>When left is used, try the hack:  </p>
-          <span class="btn-group" data-toggle="buttons">              
-            <label class="btn btn-info">
-              <input type="checkbox" autocomplete="off"><span class="state">Hack OFF</span>
-            </label>
-          </span>             
-        </div>
-          
-        <hr>
-          
-        <div style="width:100%;clear: both">
-          <button class="btn btn-success" id="start" type="button" style="margin-bottom: 15px">Start</button>
-        </div>
- 
-<!--[if IE]><p class="text-danger">The test page is not intended for legacy browsers.</p><![endif]-->
-<!--[if !IE ]><!-->
-<p>These tests are only for modern browsers. In Google Chrome you can enable the FPS metter in developer tools, <a href="https://developer.chrome.com/devtools/docs/rendering-settings" target="_blank">here's how</a>.</p>
-<p>The hack refers to adding a blank transform <code>translate3d(0px,0px,0px);</code> for the elements to promote them into separate layers, as described <a href="https://developers.google.com/web/fundamentals/performance/rendering/simplify-paint-complexity-and-reduce-paint-areas#promote-elements-that-move-or-fade" target="_blank">here</a>.</p>
-<p class="text-danger">Do not try this test on lower end or mobile devices.</p>
-<!--<![endif]-->         
-
-</div>
-<div id="container"></div>
-
-	
-
-
-<!-- JavaScript
-================================================== -->
-<!-- Placed at the end of the document so the pages load faster -->	
-<!--<script src="http://cdn.jsdelivr.net/kute.js/0.9.5/kute.min.js"></script>  KUTE CDN -->
-
-<!--[if !IE ]><!-->
-<script type="text/javascript" src="https://cdn.jsdelivr.net/bootstrap.native/0.9.9/bootstrap-native.min.js"></script>
-
-<script src="http://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/TweenMax.min.js"></script>
-<script src="./assets/js/tween.min.js"></script>
-<script src="./src/kute.js"></script>
-<script src="./assets/js/perf.js"></script>
-<!--<![endif]-->  
-</body>
-</html>
