Every 100ms Costs You Sales
A 100ms delay in mobile page load time reduces conversion rates by 7%. We engineer mobile stores to load fast, stay fast, and feel instant.
Audit My Page Speed →The three metrics that matter most
Google's Core Web Vitals directly impact both search ranking and user satisfaction. Here's what each metric measures and our target thresholds.
Measures when the largest visible element (hero image, product photo) finishes rendering. The primary measure of perceived load speed.
Measures the time from a user's first interaction (tap) to the browser's response. Critical for mobile where interactions happen immediately.
Measures unexpected layout shifts during page load. Especially damaging on mobile — a button jumping before tap causes accidental purchases.
The direct correlation between speed and sales
Amazon found that every 100ms of load time cost them 1% in sales. Walmart saw a 2% conversion increase for every 1 second of improvement. Speed isn't a tech concern — it's a revenue concern.
Our mobile performance stack
Purpose-built tools and techniques for mobile eCommerce performance that delivers measurable results.
Next-Gen Images
WebP & AVIF with automatic format selection, srcset, and lazy loading.
Critical CSS
Inline above-fold CSS, defer all non-critical styles to eliminate render-blocking.
Code Splitting
JavaScript bundles split by route with dynamic imports for on-demand loading.
Edge CDN
Content distributed globally with edge caching for sub-50ms TTFB worldwide.
PWA Caching
Service worker strategies cache critical assets for instant repeat visits.
Font Optimization
Font subsetting, swap strategy, and preload for zero-flash text rendering.
Resource Hints
Preconnect, prefetch, and preload directives to eliminate round-trip delays.
Real User Monitoring
Field data from real mobile users on real networks, not synthetic benchmarks.
The mobux speed audit checklist
Before any optimization work begins, we run a comprehensive performance audit against 40+ checkpoints across the critical mobile user journey.
Loading Performance
- LCP under 2.5 seconds
- TTFB under 600ms
- No render-blocking resources
- Images properly sized
- Fonts preloaded
- Third-party scripts audited
Interaction & Visual
- FID under 100ms
- CLS under 0.1
- No layout shifts on load
- Tap delays eliminated
- Scroll performance 60fps
- Animations GPU-composited
