Web Performance

The impact of speed

The numbers speak for themselves:

• Higher conversions - Amazon loses 1% of sales for every 100ms of delay
• Better SEO ranking - page speed is an official Google ranking factor
• Superior UX - 53% of mobile users abandon pages taking longer than 3 seconds
• Reduced costs - less bandwidth, less server load, less infrastructure
• Accessibility - fast sites are usable even on slow connections
• Core Web Vitals - fundamental User Experience metrics according to Google

Our Performance services

Core Web Vitals - The metrics that matter

Core Web Vitals are Google's official metrics for measuring User Experience:

1. Largest Contentful Paint (LCP)

Measures the loading time of the main visible content.

• Target: 4s (Poor)
• Optimizations: server response time, resource loading, client-side rendering
• Preload critical resources, image optimization, remove render-blocking resources

2. Interaction to Next Paint (INP)

Measures site responsiveness to user interactions (replaced FID in March 2024).

• Target: 500ms (Poor)
• Optimizations: reduce long tasks, JavaScript optimization, debouncing/throttling
• Web Workers for heavy operations, code splitting, lazy loading of non-critical JS

3. Cumulative Layout Shift (CLS)

Measures visual stability during loading.

• Target: 0.25 (Poor)
• Optimizations: explicit dimensions for images/video, font loading strategies
• Avoid dynamic insertions above the fold, reserve space for ads and embeds

Frontend Performance Optimization

We optimize every aspect of the frontend to maximize performance:

• Critical CSS - inline critical CSS, defer non-critical CSS
• JavaScript Optimization - code splitting, tree shaking, dynamic imports
• Resource Hints - preload, prefetch, preconnect, dns-prefetch
• Font Loading - font-display: swap, subsetting, variable fonts
• Third-party Scripts - lazy loading, facade patterns, async/defer
• Asset Optimization - minification, compression (Brotli/Gzip)

Backend & Infrastructure Optimization

Optimal performance also requires server-side optimizations:

• Server Response Time (TTFB) - backend, DB queries, and server config optimization
• HTTP/2 & HTTP/3 - modern protocols for multiplexing and performance
• Database Optimization - query optimization, indexing, connection pooling
• Server-Side Caching - Redis, Memcached, CDN edge caching
• Load Balancing - distributing load across multiple servers
• Edge Computing - Cloudflare Workers, Lambda@Edge for logic near the user

Progressive Web Apps (PWA)

We transform your site into a Progressive Web App for native-like performance:

• Service Workers - intelligent caching and offline capabilities
• App Shell Architecture - instant loading of the base interface
• Background Sync - deferred synchronization in the background
• Push Notifications - increased engagement with web notifications
• Add to Home Screen - installation as a native app
• Offline First - functionality even without a connection

Monitoring and Continuous Optimization

Performance is an ongoing process. We implement real-time monitoring:

• Real User Monitoring (RUM) - metrics from real users in production
• Synthetic Monitoring - periodic automated tests from various locations
• Performance Budgets - automatic alerts when thresholds are exceeded
• Chrome User Experience Report - aggregated field data from Chrome
• Custom Dashboards - real-time visualization of key metrics
• Performance CI/CD - performance testing in deployment pipelines

Analysis and Optimization Tools

We use the best industry tools to analyze and optimize performance:

• Google Lighthouse - comprehensive performance, accessibility, SEO, best practices audit
• WebPageTest - detailed analysis with waterfall, filmstrip, connection throttling
• Chrome DevTools - profiling, network analysis, coverage, performance panel
• PageSpeed Insights - field and lab data with Core Web Vitals
• GTmetrix - performance monitoring and historical tracking
• Cloudflare Analytics - edge analytics and performance insights