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What causes a high Largest Contentful Paint and how can I improve it

Asked on Nov 09, 2025

Answer

A high Largest Contentful Paint (LCP) is often caused by slow server response times, render-blocking resources, and large resource sizes, which delay the loading of the largest visible content element. Improving LCP involves optimizing server performance, reducing resource sizes, and minimizing render-blocking resources.

Example Concept: LCP measures the time it takes for the largest content element visible in the viewport to load. To improve LCP, prioritize critical resources by using techniques like preloading key assets, optimizing images, and deferring non-essential JavaScript to ensure faster rendering of the main content.

Additional Comment:
  • Use a Content Delivery Network (CDN) to reduce server response times.
  • Compress images and use modern formats like WebP to decrease file sizes.
  • Implement lazy loading for offscreen images and iframes.
  • Minimize CSS and JavaScript, and defer non-critical scripts.
  • Use server-side rendering (SSR) for faster initial page loads.
✅ Answered with Core Web Vitals best practices.

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