Chrome dev tools now have an emulation mode which makes it easy to watch and measure how your page loads on different connections. Watch that on a slow connecti

Chrome dev tools now have an emulation mode which makes it easy to watch and measure how your page loads on different connections. Watch that on a slow connection and you can usually see the content loaded and Dom ready events as well as the progressive loading of images, fonts, js etc. Depending on how your page is structured, you will want to pick the event that best matches when the page looks usable. There are lots of tools for then getting what that event time is for your users. Google analytics and new relic's new browser features make this easy and writing your own code isn't hard. As usual, look at the numbers by percentile and not just mean.