i was wondering about fast page load for google and facebook. how it is possible… If we say they have high quilified servers then visit http://www.iconarchive.com/ and type some thing in its search box and hit enter and see the same load time as google and facebook.
let me know about that rocket science.
There are a ton of ways to optimize pageload times.
You can use tools like yslow for firebug to learn and test some of them. On top of that there is a gazillion books and blogposts about it, and if you search here on SO you will also find tons of information about it.
I will give you a hint though: it is not rocketscience, but it is not simple enough to fit easily into a single post like this – read, study and learn 🙂
Here is a place to start:
http://developer.yahoo.com/performance/rules.html