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Web Performance Optimization: A Practical Guide
Web Development

Web Performance Optimization: A Practical Guide

Switch 2 OneMar 28, 20267 min read

Web performance directly impacts user experience, conversion rates, and search rankings. A slow site loses visitors before they even see your content.

Why Speed Matters

  • 53% of mobile users abandon a site that takes longer than 3 seconds to load
  • Google uses Core Web Vitals as a ranking factor
  • Faster pages convert better. Amazon found every 100ms of latency cost 1% in sales

Core Web Vitals

  • LCP (Largest Contentful Paint). Target under 2.5 seconds
  • INP (Interaction to Next Paint). Target under 200ms
  • CLS (Cumulative Layout Shift). Target under 0.1

Image Optimization

Images are usually the heaviest assets on a page.

  • Use WebP or AVIF formats instead of JPEG/PNG
  • Set explicit width and height to prevent layout shift
  • Use lazy loading for below-the-fold images
  • Serve responsive images with srcset

Code Optimization

  • Minify CSS, JavaScript, and HTML
  • Code splitting. Load JavaScript only when needed
  • Tree shaking. Remove unused code
  • Defer non-critical scripts

Caching and CDN

  • Browser caching. Set cache-control headers for static assets
  • Server-side caching. Cache HTML pages and database queries
  • CDN. Distribute assets globally so users download from a nearby server

Server Optimization

  • Enable HTTP/2 or HTTP/3
  • Use Gzip or Brotli compression
  • Optimize database queries
  • Reduce redirect chains

How Switch 2 One Helps

We audit and optimize your site for maximum speed. Book a free strategy session.

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