Web Performance Optimization: A Developer Guide

Core Web Vitals scores directly impact your SEO and conversion rates. Here is how to hit 90+ on every metric.

A one-second delay in page load time reduces conversions by 7%. For an e-commerce site doing $100k/month, that is $84k in lost revenue annually.

The Performance Checklist

• Serve images in WebP/AVIF format
• Implement lazy loading for below-fold images
• Use a CDN for all static assets
• Minify and bundle CSS/JS
• Eliminate render-blocking resources
• Preload LCP image
• Cache API responses at the edge