Google has released Page Speed Online, a tool for optimizing page speed. It evaluates the web page content, and generates suggestions to page loading speed, reducing page load times resulting in the decreased bounce rates and the increased conversion rates.
Page Speed Online offers the new ability for web developers to analyze the performance of webpages as displayed in smartphones. Today, a number of web sites maintain two different versions of their site content: one is optimized for larger screen real-estate and higher bandwidth available to desktops and laptops over corporate and home networks. The other is optimized for a smaller screen real estate and the content is generally lighter: potentially less JavaScript, smaller images and less text.
http://pagespeed.googlelabs.com/
