We are making an application for one of our clients where we use a mx:html to browse sites. After loading the page, we inject a javascript o do som search and replace some text characters on the complete page.

I've seen that the cpu usage goes pretty high, so the question is, is it the javascript or does anyone know how performance heavy the htmlloader is with pages with lots of content (and flash banners etc)?

I will test to remove my scripts and compare the difference as my next step, but for know it would be interesting to know if anyone has any experience with the htmloader and its performance.