How do you do page performance tests?

Question

I know everyone who reads the question will think \"Firebug!\" right away. Maybe some will think \"YSlow!\" and \"Google Page Speed!\"

While I really like these tools, I

Answer 1

Put a script block at the beginning of the document, at its end and set window.onload. Grab the current timestamp via Number(new Date) at each of these 'sequence points' and you can get a first impression of how long the page needs to render in a browser-agnostic way.