Vitality – Part 5: Interaction to Next Paint (INP) and Total Blocking Time (TBT)

Navigating the world of Core Web Vitals can sometimes feel like deciphering a secret code — one where understanding the nuances can make or break your website’s performance. With Google’s ever-evolving standards, mastering these metrics is not just nice-to-have, it’s crucial for every developer aiming for peak site performance.

Welcome to the final session of Vitality: A 5-Part Webinar Series Decoding Core Web Vitals, hosted by Kyle Van Deusen with our consistent expert, Brian Jackson from Perfmatters. In this concluding session, we dive into two critical metrics that gauge interactivity and responsiveness — Interaction to Next Paint (INP) and Total Blocking Time (TBT).

Why INP and TBT? INP measures the responsiveness of a page when a user first interacts with it, while TBT quantifies the total amount of time that a page is blocked from responding to user input. Both are crucial for understanding and enhancing the user experience.