Internal jQuery Explained - 10 Things Learned and Explained by Paul Irish

http://net.tutsplus.com/tutorials/javascript-ajax/10-things-i-learned-from-the-jquery-source/

!function( window, document, undefined){

}(this, document);

(function loop(){

doStuff();
$.load('url.php',function(){
//callback
})
setTimeout(loop,100)

})()



http://net.tutsplus.com/articles/lectures/11-more-things-i-learned-from-the-jquery-source/

http://paulirish.com/2009/perf/