Imagine yourself having a web page that is processing a huge amount of data on the server. That would take time, yes. Well, your end user does not know when it is going to finish and does not have any indication of when it is going to finish except for the browser status progress bar. The browser status bar does not tell you anything about the percent of the job done. Why is that? It is simply because the browser does not know how much it is going to take. Do not panic, there is a solution.