web-performance-optimization
Web Performance Optimization
Systematic approach to diagnosing and fixing web performance issues across loading, rendering, and runtime.
Business Impact: 1 second delay = 7% conversion loss. 0.1s improvement = 8% increase in conversions.
When to Use
- Lighthouse score below 90 or page speed regression
- Slow LCP (>2.5s), high CLS (>0.1), poor INP (>200ms), high TBT
- Large JavaScript bundles, render-blocking resources
- Layout shifts, jank, slow Time to Interactive (TTI)
- Setting up performance monitoring or budgets
- Implementing View Transitions, Speculation Rules, Server Components, Islands Architecture
Quick Reference
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