idle-task
Improve your website performance by executing JavaScript during a browser's idle periods🚀
@shinsenter/defer.js
🥇 A lightweight JavaScript library that helps you lazy load (almost) anything. Defer.js is dependency-free, highly efficient, and optimized for Web Vitals.
node-vitals
Do more with less. A simple, high-performing, functional JavaScript library.
perfist
Simple Web Application Performance Measurement Library