Performance

How to preload responsive images with imagesizes and imagesrcset

Stefan Judis • CSS, HTML, Performance

Is the web getting slower?

DebugBear • Performance

Best way to lazy load images for maximum performance

Adrian Bece • Performance

How to Use AVIF: The New Next-Gen Image Compression Format

Dan Klammer • Performance

Use advanced typography with local fonts

Thomas Steiner • Performance

How Fast Should Your Site Load?

David East • Performance

Highlighting great user experiences on the mobile web

Addy Osmani • Performance

Optimizing CSS for faster page loads

Tomas Pustelnik • CSS, Performance

content-visibility: the new CSS property that boosts your rendering performance

Una Kravets • CSS, Performance

It’s time to lazy-load offscreen iframes!

Addy Osmani • Performance