Monitoring and Alerting for Budgets

You've learned to set performance budgets. But how do you ensure your website stays within those limits as it evolves? That's where continuous monitoring and alerting come in!

Monitoring helps you:

• Catch regressions early: Identify performance drops before they impact users.
• Maintain quality: Ensure new features don't unintentionally slow things down.
• Stay competitive: Keep your site fast and responsive, meeting user expectations.

Performance budgets aren't just about page load time. They can apply to various aspects of your website:

• Resource Size: Total JavaScript, CSS, or image bundle size.
• Performance Scores: Lighthouse scores for performance, accessibility, etc.
• Metric Thresholds: Specific Core Web Vitals like Largest Contentful Paint (LCP) or Cumulative Layout Shift (CLS).
• Request Count: The number of network requests your page makes.

Continuous monitoring helps track these against your predefined limits.