I’ve built a Google Chrome extension called Page Speed Test that uses the Navigation Timing API.
You can get it (for free!) at the Chrome Web Store.
The extension displays a timeline of navigation and page load events for the current page, and a historical chart of page load timing data for all visits to the page.
It’s still a bit rough around the edges, so I’d really appreciate any feedback.
Navigation and page load timing charted for all visits to the current page
Timeline of navigation and page load events for the current visit to the current page
