HOW LARGE DOM SIZES AFFECT INTERACTIVITY, AND WHAT YOU CAN DO ABOUT IT

Summary from the TLDR Web Dev newsletter

INP (Interaction to paint time) is a key performance metric for websites, and it is largely impacted by DOM sizes. This is a deep dive of how DOM sizes affect performance. It teaches developers how to see the DOM elements associated with an interaction and provides strategies for simplifying your DOM size to improve site performance.