Web Performance Optimization

Performance isn't just about speed—it's about user experience. Let's explore practical techniques for making your web applications faster.

Core Web Vitals

Focus on the metrics that matter:

• LCP (Largest Contentful Paint): Loading performance
• FID (First Input Delay): Interactivity
• CLS (Cumulative Layout Shift): Visual stability

Image Optimization

Images are often the largest assets on a page.

Modern Formats

Use WebP or AVIF for better compression.

Responsive Images

Serve appropriately sized images for different devices.

<img
  srcset="image-320w.jpg 320w,
          image-640w.jpg 640w,
          image-1280w.jpg 1280w"
  sizes="(max-width: 640px) 100vw, 640px"
  src="image-640w.jpg"
  alt="Description"
/>

Code Splitting

Split your JavaScript bundles to load only what's needed.

Lazy Loading

Defer loading of non-critical resources.

Caching Strategies

Implement effective caching with service workers and HTTP headers.

Monitoring

Use tools like Lighthouse and WebPageTest to continuously monitor performance.

Remember: performance is a feature, not an afterthought.