There are some very interesting filters: http://code.google.com/speed/page-speed/docs/filters.html http://code.google.com/speed/page-speed/docs/filters.html I

There are some very interesting filters: http://code.google.com/speed/page-speed/docs/filters.html http://code.google.com/speed/page-speed/docs/filters.html It will automatically strip inline css and js out of a html page and then create links to an external version. It will automatically set very long cache times. It minifies css and javascript on the fly, strips whitespace and comments from the html. Then for images, it automatically rescales them, strips out meta data and recompresses. It even converts img tags to use data: uris when it's safe and efficient to do so. I love it.