Next.js 15 Performance Optimizations You Can't Ignore
From Partial Prerendering to the new caching model, here's what every engineering team should implement after upgrading to Next.js 15.
The release of Next.js 15 fundamentally changed how we think about rendering and state management. While the migration from the Pages router to the App router was painful for many, the performance benefits are now unignorable.
Embrace Partial Prerendering (PPR)
PPR is the holy grail of web development. It allows you to deliver a static shell instantly while streaming targeted dynamic content into the page. If you have an e-commerce product page, the navigation, footer, and product description can be static, while the 'Add to Cart' button and current inventory status are dynamic.
Mastering the New Cache Model
Next.js 15 made sweeping updates to how caching works by default. If you aren't careful, you might be serving stale data to your users.
- Understand the difference between
force-cacheandno-store. - Utilize Server Actions strategically to skip unnecessary client-side waterfalls.
- Use
revalidatePathandrevalidateTagto implement granular, on-demand caching sweeps.
Image Component optimization
Are your Core Web Vitals still suffering? Double-check your next/image implementation. Ensure you are using the priority attribute strictly on Above-The-Fold (ATF) imagery, and let the browser lazy-load the rest natively.
