The Complete Guide to Website Performance Optimization

Website performance directly impacts user experience, search rankings, and conversion rates.

Why Performance Matters

User Experience

• 53% of mobile users abandon sites that take longer than 3 seconds to load
• Every additional second of load time reduces conversions by 7%

SEO Impact

Google uses page speed as a ranking factor. Faster sites rank higher.

Core Web Vitals

Largest Contentful Paint (LCP)

Measures loading performance. Should occur within 2.5 seconds.

First Input Delay (FID)

Measures interactivity. Should be less than 100 milliseconds.

Cumulative Layout Shift (CLS)

Measures visual stability. Should be less than 0.1.

Optimization Techniques

• Image Optimization - Use modern formats (WebP, AVIF)
• Code Optimization - Minify CSS and JavaScript
• Caching Strategies - Browser and server-side caching
• Server Optimization - Quality hosting, HTTP/2, compression