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LCP – Deep Dive

par Yoav Weiss, édition 2021

Check the slides (fr) See the video

Largest Contentful Paint (or LCP) is the visual loading performance metric that is part of the Core Web Vitals. LCP measures the time it takes for your web page to load the largest image or text element and show it to the user.

But why do we measure the largest element? How is user interaction handled? Progressive loading of images? What about videos?

In this presentation, we will cover the history of LCP, why this metric was chosen as a representative of visual loading, its definition, how it has evolved to the present day, and how it continues to evolve.

Yoav Weiss

Presented in French by Yoav Weiss Developer Advocate, Google Chrome

Yoav Weiss has been working on mobile web performance for longer than he cares to admit, on the server side as well as in browsers. He now works as part of Chrome’s web platform team, helping to fix web performance once and for all.

He takes image bloat on the web as a personal insult, which is why he joined the Responsive Images Community Group and implemented the various responsive images features in Blink and WebKit. That was his gateway drug into the wonderfully complex world of browsers and standards.

When he’s not writing code, he’s probably slapping his bass, mowing the lawn in the French countryside, or playing board games with his family.