I needed to get rough metrics of web page load times across different browsers. While the built in development tools are good for fine-grained timing, outside of pay tools (eg: HttpWatch) or browser-specific (Page load time Chrome extension) I couldn’t find anything easily available for general page load time.
It turns out that the time between performance.timing.navigationStart and performance.timing.loadEventEnd does a good job of this, as it shows the time elapsed between when the browser starts navigating to the new page and when it feels the page is done loading (the load event handler is terminated).
A bookmarklet containing the following can be used to do this:
javascript:(function(){ var loadtime = (performance.timing.loadEventEnd - performance.timing.navigationStart) / 1000; alert("Page Load Time: " + loadtime + " sec"); })();
This link can be dragged and dropped to your Favorites / Bookmarks bar to easily create a bookmarklet with this content: Page Load Time