Reading/Web/Projects/Performance/Lazy loading images

Lazy loading images was enabled on the production beta channel on the 24th March. As an example, this led to the overall bytes served to users for images on the Barack Obama article dropping from 657kb to 169kb.

Early data shows this had a positive impact on the 95th percentile of beta anonymous and authenticated users in our global metrics but impact was less clear in our controlled tests on Barack Obama.