Sustainable Websites: How Performance Cuts CO2
Sustainable websites: how fewer bytes, lean JavaScript and efficient caching cut the CO2 footprint while improving Core Web Vitals at the same time.
Sustainable websites: how fewer bytes, lean JavaScript and efficient caching cut the CO2 footprint while improving Core Web Vitals at the same time.
Every second of load time decides conversion and cart value: how speed drives revenue, what 100 milliseconds are worth and Core Web Vitals in euros.
How the Speculation Rules API prefetches or prerenders next pages, tunes eagerness correctly, and avoids wasted prerenders and analytics side effects.
Lighthouse lab scores do not affect ranking. Google rates Core Web Vitals via CrUX field data at the 75th percentile. How to use RUM, CrUX and budgets.
How fetchpriority='high' loads the LCP image sooner: correct use, interplay with preload and srcset, the most common mistakes and the LCP quick win.
Visual Stability Index (VSI): in 2026 Google measures layout stability across the whole visit, not just page load. How to make your website future-proof.
LQIP, blur-up and responsive images for faster image build-up: better perceived and measured performance, fewer layout shifts, strong Core Web Vitals.
SSR delivers HTML fast, but hydration costs performance. Islands, partial hydration and resumability for fast shops and strong Core Web Vitals.
Avoid CLS: fix layout shifts from images, fonts, ads and injections precisely. The result is measurably more stable shop layouts with a good CLS score.