What causes a high LCP time and how can I fix it efficiently?
Asked on Sep 10, 2025
Answer
A high Largest Contentful Paint (LCP) time is often caused by slow server response times, render-blocking resources, and large image sizes. To efficiently fix this, you can optimize server performance, defer non-critical JavaScript, and ensure images are properly compressed and sized.
Example Concept: LCP measures how quickly the largest visible element (e.g., image, video, or block-level text) is rendered on the screen. Improving LCP involves optimizing server response times, minimizing render-blocking CSS and JavaScript, and ensuring images are properly compressed and delivered in next-gen formats like WebP.
Additional Comment:
- Optimize server response times by using a Content Delivery Network (CDN) and enabling server-side caching.
- Defer non-critical JavaScript and use async or defer attributes to prevent render-blocking.
- Compress and resize images, and consider using responsive images with the "srcset" attribute.
- Preload key resources such as fonts and critical CSS to speed up rendering.
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