Speed Optimization

I’m working on a large fullscreen project for a client with a lot of animation. I have the FPS jacked up. But even in Medium Quality on a decent machine, I can’t get it to display a decent framerate in a browser. There isn’t really a way I can eliminate the animation(client wanted specifics) and I can’t go low quality.

Is there any tricks or hints I could use to take less system power and display at a decent framerate?