
ยท deepdives
Unleashing the Power of PerformanceObserver: How to Optimize Your Web App
Learn how to use the PerformanceObserver API to capture real, user-centric performance metrics (LCP, FCP, CLS, FID/INP, long tasks), send them for analysis, set SLOs, and iterate on improvements with code examples, percentile calculations, and real-world optimizations.