When optimizing the performance of a homepage in Next.js, it's essential to minimize Largest Contentful Paint (LCP) and First Contentful Paint (FCP) times. LCP measures the time it takes for the largest visible element (like an image or block of text) to load, while FCP measures how quickly the first content element appears on screen.
To achieve better performance, reduce LCP and TTFB (Time to First Byte), one effective approach is to split components and lazy load non-critical sections after the initial render. Here's how:
๐ญ. ๐ฅ๐ฒ๐ป๐ฑ๐ฒ๐ฟ๐ถ๐ป๐ด ๐๐ฟ๐ถ๐๐ถ๐ฐ๐ฎ๐น ๐๐ผ๐บ๐ฝ๐ผ๐ป๐ฒ๐ป๐๐ ๐๐ถ๐ฟ๐๐
The first component that appears on your homepage should be visible immediately. For other sections, they can load after the first render, reducing time to display initial content. If you have multiple sections, like six, and only the first one needs to be visible initially, use dynamic imports for the remaining sections.
Example :
import dynamic from "next/dynamic";
const Features = dynamic(() => import("./_components/home/Features "), {
ssr: false,
loading: () => <p>Loading...</p>,
});
By doing this, you prevent unnecessary JavaScript from loading during the first render, which helps reduce TTFB and speed up FCP.
๐ข๐ฝ๐๐ถ๐บ๐ถ๐๐ถ๐ป๐ด ๐๐๐ฃ ๐๐ถ๐๐ต ๐๐บ๐ฎ๐ด๐ฒ ๐ฃ๐ฟ๐ฒ๐น๐ผ๐ฎ๐ฑ๐ถ๐ป๐ด
Images are often responsible for LCP. To improve performance, load important images earlier. The Next.js Image component allows you to set the priority prop on critical images:
This ensures that critical images are fetched as early as possible, reducing LCP times.๐ฅ๐ฒ๐ฑ๐๐ฐ๐ถ๐ป๐ด ๐๐ฎ๐๐ฎ๐ฆ๐ฐ๐ฟ๐ถ๐ฝ๐ ๐ฎ๐ป๐ฑ ๐๐ผ๐บ๐ฝ๐ผ๐ป๐ฒ๐ป๐ ๐๐ผ๐ฎ๐ฑ
Split your code into smaller, lazily-loaded components. Using dynamic imports with ssr: false delays the loading of non-critical sections, making the page interactive faster and reducing JavaScript execution time.
- ๐๐ถ๐ป๐ฎ๐น ๐ง๐ต๐ผ๐๐ด๐ต๐๐ :- To optimize your homepage's performance: Render critical components first and lazy load others with dynamic imports. Use the priority prop for images to load critical images earlier. Split components and load JavaScript lazily to reduce initial load time. These strategies will improve LCP, FCP, and overall performance, providing a faster and more responsive user experience
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