Note from 30 April 2022

When you start using an image CDN on a site with oversized JPEGs, without any change to the HTML:

SpeedCurve test showing a 20 seconds gain in Largest Contentful Paint

Imagine when there will be accurate srcset/sizes attributes, better formats, etc. 🤯

  1. Note from 4 April 2024

    Most mentions of the magical CSS object-fit: cover; in development tutorials should be accompanied by a warning: in most situations, it means the browser will download an image that is larger than required (at least in one direction), and optimization on the server side could be a better option.