One thing fast sites have in common: they use performance budgets to fight regressions and deliver a consistently fast experience to their users. Here's a VERY detailed guide that covers:
⭐ Budgets vs goals
⭐ Which metrics to track (including and beyond Core Web Vitals)
⭐ How to set thresholds
⭐ Getting stakeholder buy-in
⭐ Integrating budgets with your CI/CD process
