title: iOS7 UIWebView Memory leak
body: <p>We have an comprehensive iOS app with Hybrid mode - a UIWebView hold the major part of the web application in JS. It works fine on iOS6, but recently we found serious out of memory crash on all iOS7 device - iPad, iPhone 4/4S and iPhone 5/5C/5S. We did analysis of the memory consumption both on iOS6 and 7 in the iOS simulator. By doing same interaction in the app, the memory consumption of the WebView is always less than 200MB in iOS6, while it can exceed <b>800MB</b> on iOS7! 
  <br><br>We guess there is some serious memory management issue in the WebView on iOS7. But lack of the tool to profile the JS within the WebView, we cannot located the root cause. 
  Here we'd like to ask whether anyone has similar problems, and any tool / approach can help further look insight the UIWebView to dig to the exact problem. THx. </p>