I have a website that has so much content on it that it was coming to a halt. after installing this extension it fell from taking 7+seconds to load to 3+ seconds to load.
How i did this? because i was using Jomsocail the users uploaded pictures, videos and so on that were being updated constantly. now i was thinking of using a different location to serve the community images from but that would not work because i would have to copy them there manually, or via a cron-job, thing is i can only run my cran-job once a minute. so when someone uploads a picture it would take a minute to show up. not acceptable!!! but i went ahead and created a few sub domains and point them to my main install "public_html", and after that configured the CDN extension to use those sub domain to deliver the pictures, js, css etc. and the site was like woooooo. i immediately saw my page views per person increased almost doubled and my bounce rate decrease almost doubled and my ad revenue increased almost doubled. lolol.
Please install don't ask don't wait!!!!