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CDNs alone cannot fix Core Web Vitals issues. While CDNs optimize delivery speed (TTFB and resource load time), they cannot address render-blocking JavaScript, main thread blocking, or layout shifts. Real performance gains require server-side optimization (40%), client-side optimization (35%), and asset optimization (10%). Case studies from Netflix, Airbnb, Shopify, and Wayfair demonstrate that fixing LCP requires resource prioritization, INP needs main thread management with Web Workers, and CLS demands explicit container dimensions. A 90-day roadmap includes immediate diagnostics with PageSpeed Insights, RUM implementation, font loading optimization, performance budgets, and Lighthouse CI integration to achieve 40-60% LCP improvements and 5-15% conversion increases.

Your CDN Won't Save Web Vitals - The No-Nonsense Guide to Fixing Web Vitals

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