There's an option that allows enabling accelerated lightweight rendering mode. This rendering mode has improved performance compared to default lightweight rendering mode. It allows producing ~30% more frames per second.
Important: the only disadvantage of this accelerated rendering mode is that it doesn't support WebGL, because GPU process isn't used in this case. If you don't need to display web pages with WebGL, we recommend that you enable and use accelerated lightweight rendering mode.
To enable accelerated lightweight rendering mode you must specify the following Chromium switches before you create the first Browser instance in your application:
BrowserPreferences.SetChromiumSwitches( "--disable-gpu", "--disable-gpu-compositing", "--enable-begin-frame-scheduling", "--software-rendering-fps=60" );