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Passing Core Web Vitals in a React app: what moves LCP

On Qatar's national event platforms I brought core pages to Core Web Vitals compliance through memoization, virtualization, lazy loading and code splitting, which improved LCP by about 35% and TTI by…

  • Largest Contentful Paint (LCP) should be 2.5 seconds or less
  • Code splitting sends a screen only when it is opened
  • Memoization and virtualization minimize layout shift (CLS)

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