Speculations about Web Performance - Barry Pollard - performance.now() 2025

The Speculations Rules API brings a declarative way of "speculating" future navigations right into the browser with a simple JSON-based structure. In this talk you'll learn about all the features added to the API over the last year, learn how to safely deploy it on your site, and also get some hints about what to expect in the near future! Slides: https://docs.google.com/presentation/d/1YZR_Oay1nzE9ujHndF-1yNkjNx2bRXy3MRNY7P5ngZA/ performance.now() 2025 individual sessions are available via https://perfnow.nl/stream. This video appears here courtesy of Google. *** A session from performance.now(), the web performance conference. Each November in Amsterdam; see https://perfnow.nl for more information. Conference announcements in your inbox? https://perfnow.nl/subscribe