Building Scalable Websites: Performance Tips from the Blurs Team

At Blurs, we've learned a lot about building scalable web applications that perform well under pressure. Whether you're building a simple landing page or a complex web app, these performance optimization techniques will help you create faster, more reliable websites.

Core Web Vitals: What Really Matters

Google's Core Web Vitals are the foundation of web performance:

Largest Contentful Paint (LCP)

Target: Under 2.5 seconds

Optimize your hero images and above-the-fold content

Use modern image formats (WebP, AVIF)

Implement proper image sizing and lazy loading

First Input Delay (FID)

Target: Under 100 milliseconds

Minimize JavaScript execution time

Break up long-running tasks

Use code splitting to load only what's needed

Cumulative Layout Shift (CLS)

Target: Under 0.1

Always specify image dimensions

Avoid inserting content above existing content

Use CSS transforms instead of changing layout properties

Performance Optimization Strategies

1. Smart Asset Loading

``javascript

// Lazy load images

const img = new Image();

img.loading = 'lazy';

img.src = 'hero-image.webp';

// Preload critical resources

//

//

``

2. Code Splitting and Tree Shaking

Split your JavaScript into smaller chunks

Load components only when needed

Remove unused code with tree shaking

Use dynamic imports for route-based splitting

3. Caching Strategies

Implement proper HTTP caching headers

Use service workers for offline functionality

Cache API responses with appropriate TTL

Leverage CDN for static assets

4. Database Optimization

Index frequently queried columns

Use connection pooling

Implement query optimization

Consider database replication for read-heavy workloads

Real-World Performance Wins

Here's how we optimized Blurs platform:

Before Optimization

LCP: 4.2 seconds

FID: 180ms

CLS: 0.25

Bundle size: 2.1MB

After Optimization

LCP: 1.8 seconds (-57%)

FID: 45ms (-75%)

CLS: 0.05 (-80%)

Bundle size: 890KB (-58%)

Tools We Use Daily

Performance Monitoring

Lighthouse: Automated performance auditing

WebPageTest: Detailed performance analysis

Chrome DevTools: Real-time performance profiling

Core Web Vitals: Google's performance metrics

Build Optimization

Webpack Bundle Analyzer: Identify large dependencies

Next.js: Built-in performance optimizations

Vercel: Edge deployment and analytics

Cloudflare: CDN and security

Performance Budget Strategy

Set and stick to performance budgets:

JavaScript bundle: Less than 500KB compressed

CSS bundle: Less than 100KB compressed

Images: Less than 500KB per page

Total page weight: Less than 2MB

Time to Interactive: Less than 3 seconds

Monitoring and Alerting

Don't just optimize once—monitor continuously:

Set up performance alerts

Track Core Web Vitals over time

Monitor user experience metrics

A/B test performance improvements

The Blurs Advantage

When you build with Blurs, you get all these optimizations automatically:

Automatic image optimization and modern formats

Code splitting and lazy loading out of the box

Performance monitoring and alerts

CDN deployment with edge caching

Mobile-first responsive design

Ready to build lightning-fast websites? [Try Blurs](https://blurs.io) and let our AI handle the performance optimization for you.