While site speed is a “new” signal, it may not carry as much weight as the relevance of a page, title tag of the page or the content on the page. Google Webmaster Central says that, currently, less than 1% of search queries are affected by the site speed signal and the signal for site speed only applies for visitors searching in English on Google.com at this point (April 2010).
With Page Speed, Google will be able to comfy with the website performance in no time and will be able to provide us the suggestions to make it better. Page Speed is open-source Firefox / Firebug add-on. Page Speed performs several tests on a site's web server configuration and front-end code. These tests are based on a set of best practices known to enhance web page performance. Webmasters who run Page Speed on their pages get a set of scores for each page and helpful suggestions to improve its performance.
Page Speed evaluates performance from the user’s point of view, typically measured as the page load time. This is the lapsed time between the moment a user requests a new page and the moment the page is fully rendered by the browser. The best practices cover many of the steps involved in page load time, including resolving DNS names, setting up TCP connections, transmitting HTTP requests, downloading resources, fetching resources from cache, parsing and executing scripts, and rendering objects on the page. Essentially Page Speed evaluates how well your pages either eliminate these steps altogether, parallelize them, and shorten the time they take to complete. The best practices are grouped into five categories that cover different aspects of page load optimization:
- Optimizing caching - keeping your application's data and logic off the network altogether
- Minimizing round-trip times - reducing the number of serial request-response cycles
- Minimizing request overhead - reducing upload size
- Minimizing payload size - reducing the size of responses, downloads, and cached pages
- Optimizing browser rendering - improving the browser's layout of a page