R
Rishikesh Baidya
Author
May 1, 20249 min read
Development
Featured Image
Performance is a feature. A fast site improves user experience, SEO rankings, and conversion rates. At Softechinfra, our development team has optimized Next.js applications like TalkDrill to achieve perfect Core Web Vitals scores.
2.5s
LCP Target
100ms
INP Target
0.1
CLS Target
90+
Lighthouse Score
Core Web Vitals Explained
| Metric | What It Measures | Good Score |
|---|---|---|
| LCP (Largest Contentful Paint) | Loading performance—when main content loads | <2.5 seconds |
| INP (Interaction to Next Paint) | Interactivity—response to user actions | <200 milliseconds |
| CLS (Cumulative Layout Shift) | Visual stability—unexpected layout shifts | <0.1 |
Image Optimization
next/image
Automatic WebP/AVIF, lazy loading, responsive sizes
Priority Loading
Use priority prop for above-the-fold images
Fixed Dimensions
Always set width/height to prevent CLS
Blur Placeholder
Smooth loading experience with LQIP
✅ Real Result: For AppliedView, implementing next/image reduced image payload by 60% and improved LCP by 1.2 seconds.
Rendering Strategies
"Choose your rendering strategy based on data freshness needs. Static for rarely changing content, ISR for regular updates, Server Components for dynamic personalization."
| Strategy | When to Use | Performance |
|---|---|---|
| Static (SSG) | Rarely changing content | Fastest—served from CDN |
| ISR | Content updated periodically | Fast with background updates |
| Streaming | Mixed content speeds | Progressive loading with Suspense |
| Dynamic | Personalized or real-time | Slower but always fresh |
JavaScript Optimization
Analyze
Code Split
Tree Shake
Lazy Load
Monitor
Key Techniques
- Dynamic imports: Load components only when needed
- Bundle analyzer: Identify heavy dependencies
- Tree shaking: Import only what you use
- next/font: Self-host fonts with zero layout shift
⚠️ Common Mistake: Importing entire libraries when you only need one function. Always use specific imports (e.g.,
import debounce from 'lodash/debounce' instead of import _ from 'lodash').
Caching Best Practices
- Use
force-staticfor truly static pages - Configure revalidate for ISR pages based on data freshness
- Cache fetch requests with appropriate TTL
- Leverage CDN edge caching for static assets
- Implement stale-while-revalidate patterns
💡 Pro Tip: Use the Web Vitals library to monitor real user metrics (RUM), not just lab data from Lighthouse. Real-world performance can differ significantly.
For related React patterns, see our React 19 Guide.
Need a High-Performance Next.js Application?
Our development team builds blazing-fast Next.js applications with perfect Core Web Vitals scores.
Discuss Your Project →Explore more in our Full-Stack TypeScript Guide and see performance optimization in action on ExamReady.
Tags:
Next.jsPerformanceWeb DevelopmentCore Web VitalsReact