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How To Fix Largest Contentful Paint Issues With Subpart Analysis
- The Largest Contentful Paint (LCP) metric in Core Web Vitals assesses a website's loading speed, impacting user experience and search engine rankings.
- To address LCP issues effectively, Google introduced LCP subparts, allowing analysis of page load delays through components like TTFB and image load times.
- LCP subparts divide the metric into Time to First Byte, Resource Load Delay, Resource Load Time, and Element Render Delay, providing insights for optimization.
- DebugBear's website speed test helps measure LCP subparts' contributions to the overall LCP score.
- Optimizing Time to First Byte involves speeding up server response or caching HTML for faster page generation.
- Resource Load Delay may occur due to lazy loading techniques, which can be improved by using native lazy loading attributes instead of libraries.
- The Load Duration subpart focuses on downloading the LCP image efficiently, recommending modern image formats and proper image sizing for optimization.
- Element Render Delay, the final LCP component, addresses delays in displaying content, often influenced by render-blocking scripts and preloading strategies.
- Google's inclusion of LCP subpart data in CrUX reports offers valuable insights into real user experiences and optimization opportunities.
- Real-user monitoring tools like DebugBear help track LCP scores across website pages, providing detailed insights into visitor experiences and subpart timings.
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