You've been told to "don't block the main thread" and "break up your long tasks", but what does it mean to do those things?
The BBC is rolling out HSTS for their website to improve security and performance. Find out what it means, and how HSTS can help you.
GOV.UK dropped their jQuery dependency from their front end. You'll never
guess what happened. (Yes, you will.)
Find out what the browser preload scanner is, how it helps performance, and how you can stay out of its way.
Learn the basics of using the Navigation and Resource Timing APIs to assess loading performance in the field.
Learn about rel=preconnect and rel=dns-prefetch resource hints and how to use them.