"""Think about it, in the 'full stack' of browser -> client -> interweb -> web server -> app server -> db server the little bit of code that you wrote is minuscule compared to what you didn't write.""" This. The old saying "don't prematurely optimize" has never been truer. Too bad it's gotten harder to profile. Unless you write a boring CGI, one-load-per-page site, you're never going to be able to get all of that information server-side. The only way is with browser-based testing frameworks... Sigh.