I bumped into a nice solution that enables you to speed up your websites pages loading.
“Page Speed Service is an online service to automatically speed up loading of your web pages. Page Speed Service fetches content from your servers, rewrites your pages by applying web performance best practices and serves them to end users via Google's servers across the globe”.
I think that this is a good solution for those who doesn’t familiar with the advanced caching solutions or for beginner or not pro developers which want a way to increase performance, but if you are an experienced developer you should get your own solutions coding them under your application like: caching, load balancer solutions for large website etc…
you get get some more information here.