What is a good resource for understanding the DOM/query selectors and their performance (JS and CSS selectors)? All that I know about it is just through word of mouth and it would be great to look at a resource that covers these things.
Also, is document.createElement('div') really much faster than $("<div></div>")? Just checked and a lot of well-respected JS libs use (including Backbone) use the jQuery version.
EDIT: typo