Website Speed Optimization for E-Commerce Stores

Speed Equals Revenue

Amazon found that every 100ms of latency cost 1% in sales. For e-commerce stores, speed optimization is revenue optimization.

Key Pages to Optimize

Homepage

First impression page. Target LCP under 2 seconds. Optimize hero images and defer non-critical scripts.

Category Pages

Product grid pages need fast rendering. Lazy load images below the fold. Use efficient pagination or infinite scroll.

Product Pages

The most important pages for conversion. Optimize product images, minimize third-party scripts, and ensure the buy button renders quickly.

Checkout

The final barrier to conversion. Minimize JavaScript, pre-fetch payment processing, and eliminate unnecessary form fields.

Technical Optimizations

Images

WebP format with JPEG fallback

Responsive images with srcset

Lazy loading for off-screen images

Image CDN for dynamic resizing

JavaScript

Code split by route

Defer non-critical scripts

Remove unused polyfills

Use web workers for heavy computation

Caching

Browser cache headers (1 year for static assets)

CDN caching for global performance

Service worker for returning visitors

Measuring Impact

Track Core Web Vitals alongside revenue metrics. A/B test performance improvements to quantify the revenue impact of speed changes.