Short, curated notes. One email when something good lands.
55% of visitors leave sites in under 15 seconds; prioritize <3s loads (1s delay cuts 7% conversions), match URL expectations, simplify nav, cut ads/sound/autoplay, organize content, build trust to boost retention.
Google research shows 53% of mobile visitors abandon pages taking over 3s to load. Average sites hit 19s on 3G/14s on 4G. Under 5s loads yield 70% longer sessions, 35% lower bounce, 25% better ad viewability.
Target LCP under 2.5s, INP under 200ms, and CLS under 0.1 at the 75th percentile of page loads across devices to deliver great loading, interactivity, and visual stability—measure with web-vitals JS library and Google field tools like CrUX.
Nearly half of mobile visitors leave if pages take over 3 seconds to load. Prioritize fast loading, zoom-free navigation, and minimal-step actions aligned to your top business goal like sales.
Use Three.js for 3D scenes, GSAP ScrollTrigger/Observer for unified input, and WebGL optimizations like KTX2 textures, GPU instancing, and Draco compression to hit 144 FPS on desktop and steady rates on mobile.