title: IE 11 WebGL performance slow when using WebBrowser control
body: <p>I'm trying to embed Cesium in a WebBrowser control inside of a WinForms or WPF application (using IE 11).  As a test I'm using this link: </p>
  
  <p><a href="http://cesiumjs.org/Cesium/Build/Apps/CesiumViewer/index.html?stats=true" rel="noreferrer">http://cesiumjs.org/Cesium/Build/Apps/CesiumViewer/index.html?stats=true</a></p>
  
  <p>It "works" but is much much slower than using IE 11 directly. In IE 11, everything runs at 60fps; in a simple WPF or WinForms app with the WebBrowser control it runs at 4-6 fps.  I've been unable to track down the cause of the problem.  This is with a blank Form or WPF Panel with the WebBrowser control set to fill the entire pane.  There's no transparency or other issues that I can imagine.  I've noticed that going to the above link inside of the Visual Studio embedded browser has the same effect.  Does WebBrowser control not JIT JavaScript?  Is it a WebGL issue?  Is there a way I can debug this to figure out what's going on?  Any help would be greatly appreciated.</p>