title: Major performance loss in UIWebView on iOS 9
body: <p>I have boiled down my issue to a very simple scenario and it appears to be with iOS 9+ and UIWebView with a website that has lots of page loads (like you would get from navigating).</p>
  
  <p>I followed this tutorial (<a href="http://conecode.com/news/2011/05/ios-tutorial-creating-a-web-view-uiwebview/">http://conecode.com/news/2011/05/ios-tutorial-creating-a-web-view-uiwebview/</a>) to build a simple iOS app with a UIWebView.  I pointed the UIWebView at a static html that looks like what I have at the bottom.  </p>
  
  <p>I then refreshed the page with the button (or the script that does it automaticly) and eventually the app grows slower and slower (usually around 50-80 refreshes).  I have the list in the page for demonstration because it allows you to scroll, which highlights the issue much sooner.</p>
  
  <p>Any help or direction for me to look into resolving this issue?</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
  &lt;head&gt;&lt;/head&gt;
  &lt;body&gt;
  &lt;FORM&gt;&lt;INPUT id="demo" TYPE="button" onClick="history.go(0)" VALUE="refresh"&gt;&lt;/FORM&gt;
      &lt;ul data-role="listview" &gt;
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
                  &lt;li&gt;This is an Item&lt;/li&gt;    
      &lt;/ul&gt;
      &lt;script&gt;
          var elem = document.getElementById("demo");
          elem.value = Date();
          location.reload();
      &lt;/script&gt;    
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>