The Ultimate Guide to Next.js Performance in 2025
WeReact Team
Thought Leader
Performance isn't just a metric; it's a feature. In 2025, user expectations are higher than ever, and search engines like Google continue to prioritize speed through Core Web Vitals. For any digital agency or business, a slow website is a lost opportunity.
Why LCP Matters Most
Largest Contentful Paint (LCP) is often the hardest metric to get right. It represents the time it takes for the largest visual element on the screen to become visible. On most landing pages, this is the hero image. Using art direction with the <picture> element and Next.js's getImageProps API can significantly reduce LCP by ensuring the browser preloads only the device-appropriate image source.
Dynamic Importing for TBT
Total Blocking Time (TBT) measures the total amount of time a page is blocked from responding to user input. By using next/dynamic to defer non-critical components (like footers, complex animations, or below-the-fold sections), we can drastically reduce the initial JavaScript execution time.
"Speed is the bridge between a visitor and a customer."
Accessibility and SEO
Don't forget that speed alone won't rank you. Semantic HTML, proper ARIA labels, and high-contrast text are essential for accessibility and search engine crawlability. At WeReact, we integrate these practices into every line of code we write.