How this site performs
This page contains web performance stats for this website. It's taken from real user monitoring, which I've added using Boomerang.
Real user monitoring works by sending a beacon containing performance data for every visit to a page on the site. This makes it a good way to gain insights into the experience a website delivers.
Not every test reports on every metric – for example, some browsers don't support first contentful paint.
I've just picked out a few metrics to highlight on this page.
Response start
When the first byte of data is delivered to the browser.
First contentful paint
This aims to measure the point at which people can begin to consume content on the page.
DOMContentLoaded
The DOM and CSSOM are likely to be ready at this point. DOMContentLoaded can be important because some scripts will wait for this event before executing.
Onload
The time it takes for all the resources on the page to finish loading – although this excludes script-injected assets that are fetched only when the onload event has fired.
Response start
First contentful paint
DOMContentLoaded
Onload
Resource timings for latest test
The following waterfall chart is taken from the most recent test (excluding tests of this page) and gives an indication of how long it took to load the resources on that page.