PageSpeed Optimization

Overview
Hands-on Core Web Vitals overhaul (no dev team necessary) to achieve 100/100 mobile & desktop scores

References

  • E-commerce site: FCP 0.8s → 0.3s, LCP 2.1s → 0.8s → +18% AOV
  • B2B platform: TBT 120 ms → 20 ms → –12% bounce rate

pagespeed optimization process

The Process Flow

Core Web VitalBaselineTargetCurrentTools
First Contentful Paint1.9 s≤0.8 sLighthouse, WebPageTest
Largest Contentful Paint4.2 s≤1.1 sChrome DevTools, PSI
Total Blocking Time180 ms≤50 msLighthouse
Cumulative Layout Shift0.25≤0.01CLS Extension, Web Vitals API
PageSpeed Score68100PageSpeed Insights