Harry Roberts takes a look at some more technical and non-obvious aspects of optimising Largest Contentful Paint:
Largest Contentful Paint (LCP) is my favourite Core Web Vital. It’s the easiest to optimise, and it’s the only one of the three that works the exact same in the lab as it does in the field (don’t even get me started on this…). Yet, surprisingly, it’s the least optimised CWV in CrUX—at the time of writing, only half of origins in the dataset had a Good LCP