š Web Performance Tuning ā How to Make Your Website Blazing Fast
Performance tuning is the process of optimizing a website or web app so it loads faster, uses fewer resources, and delivers a better user experience.
ā” Faster websites = better SEO, higher conversions, and happier users.
ā Core Performance Metrics (Lighthouse/Pagespeed)
Metric | Goal |
---|---|
š¢ First Contentful Paint (FCP) | < 1.8s |
š¢ Largest Contentful Paint (LCP) | < 2.5s |
š¢ Time to Interactive (TTI) | < 3.8s |
š¢ Cumulative Layout Shift (CLS) | < 0.1 |
š¢ Total Blocking Time (TBT) | < 200ms |
š§Ŗ 1. Audit Your Website First
Use tools like:
š” 2. Frontend Performance Tips
š§© Optimize Images
Use modern formats:
WEBP
,AVIF
Compress with TinyPNG or
imagemin
Use
srcset
andloading="lazy"
š§ Minimize CSS and JS
Remove unused CSS (e.g., PurgeCSS/Tailwind JIT)
Minify JS and CSS (
Terser
,cssnano
)Use tree shaking to eliminate dead JS
ā” Lazy Load Non-Critical Assets
<img src="img.jpg" loading="lazy" alt="..." />
š§± Use a CDN
Serve static files via CDN (e.g., Cloudflare, Vercel, Netlify)
š¦ 3. Bundle Optimization
Tool | Action |
---|---|
Webpack/Vite | Enable code splitting and minification |
ESBuild | Use for super-fast builds |
Rollup | Great for libraries and small apps |
š 4. Reduce Server Response Time (TTFB)
Cache responses with Redis or Memcached
Optimize database queries (indexes, joins)
Use HTTP/2 or HTTP/3
Use reverse proxy cache (e.g., Nginx, Cloudflare)
šļø 5. Enable Caching Properly
Browser Caching Headers:
Cache-Control: public, max-age=31536000, immutable
Use service workers for advanced caching in PWAs.
ā³ 6. Improve Initial Load
Preload critical resources
html<link rel="preload" href="main.css" as="style">
Inline critical CSS
Use minimal HTML on first paint
š¤ 7. Defer/Async JavaScript
<script src="script.js" defer></script>
<script src="analytics.js" async></script>
š» 8. Database Performance Tips
Use indexes properly
Avoid N+1 queries
Paginate results instead of loading large datasets
Use connection pooling
š§Ŗ 9. Use Monitoring Tools
Tool | Purpose |
---|---|
Google Analytics | Real user metrics (RUM) |
Sentry | Error tracking |
New Relic / Datadog | App/server performance |
Lighthouse CI | Continuous performance auditing |
ā 10. Bonus Tips
Use HTTP/2 for multiplexing
Enable gzip or Brotli compression
Avoid CSS/JS frameworks you donāt need
Minimize use of third-party scripts (ads, widgets)
š§° Recommended Stack & Tools
Purpose | Tool |
---|---|
Auditing | Lighthouse, PageSpeed Insights |
Image Optimization | ImageMagick, Sharp, TinyPNG |
JS Minification | Terser, esbuild |
CSS Cleanup | PurgeCSS, Tailwind JIT |
CDN | Cloudflare, Fastly, Netlify |
Hosting | Vercel, Firebase, AWS, Render |