reddit

“In order to understand Prefetching, we need to understand how a web page with multiple objects like images, stylesheets etc is loaded by a Browser. In a usual scenario, we always have a web page designated as the HTML rendered by the browser. This webpage then has the embedded objects like images ( jpeg,gif,png etc) , stylesheets ( css ) etc. When the user makes a request for such a webpage, the first thing a web browser does is load the HTML. The browser then parses the HTML and asks for the different objects in a top-down fashion.” source...