Inside the Let’s make the web faster website, Google is sharing the tips & tutorials for better performing web pages like: HTTP Caching, PHP performance, Javascript optimization and more.
Besides the articles, It is possible to reach videos of speeches by several organizations on website performance.
Also, links to various tools for the issue provided & a large community discusses the subject continiously.
Now, Google is sharing an open source Apache module named mod_pagespeed that automatically optimizes web pages and make them faster to load.
It works with Apache 2.2 and includes several filters that optimize JavaScript, HTML, CSS stylesheets, JPEG and PNG images.
You can read more here: http://code.google.com/speed/page-speed/docs/overview.html.
