Speed Is a Feature

Google research shows 53% of mobile users abandon sites that take over 3 seconds to load. Performance directly impacts conversion rates, SEO rankings, and user satisfaction.

Core Web Vitals

Google's metrics for user experience:

Largest Contentful Paint (LCP)

Target: < 2.5 seconds

Measures when the main content loads. Improve with:

• Optimized images (WebP format, proper sizing)
• Fast server response times
• Efficient CSS delivery
• CDN for static assets

First Input Delay (FID) / Interaction to Next Paint (INP)

Target: < 100ms

Measures interactivity. Improve with:

• Code splitting
• Deferred JavaScript loading
• Web Workers for heavy computation
• Efficient event handlers

Cumulative Layout Shift (CLS)

Target: < 0.1

Measures visual stability. Improve with:

• Size attributes on images
• Reserved space for ads/embeds
• Avoiding dynamic content injection
• Proper font loading

Our Optimization Techniques

Image Optimization

Original: 2MB PNG
Optimized: 150KB WebP
Result: 92% smaller, same quality

We use:

• Next.js Image component
• Automatic format selection
• Lazy loading below fold
• Responsive sizing

JavaScript Optimization

• Tree shaking unused code
• Code splitting by route
• Dynamic imports for heavy libraries
• Deferred loading of non-critical scripts

CSS Optimization

• Critical CSS inlined
• Unused CSS removal
• Efficient selectors
• CSS containment

Caching Strategy

Static assets: 1 year cache
API responses: Varies by data
HTML: No cache (always fresh)

Server Optimization

• Edge deployment (CDN)
• Gzip/Brotli compression
• HTTP/2 multiplexing
• Connection keep-alive

Measuring Performance

We use:

• Lighthouse for audits
• WebPageTest for detailed analysis
• Real User Monitoring (RUM)
• Core Web Vitals in Search Console

Real Results

Recent optimization project:

• Before: 6.2s LCP, 45 performance score
• After: 1.8s LCP, 94 performance score
• Result: 35% increase in conversions

Conclusion

Performance optimization is an ongoing process, not a one-time task. At PeakCodeSolutions, we build fast by default and continuously monitor and improve.