https://www.pagespeed-optimierung.de/en/blog/ Expert articles and insights from PageSpeed Optimization. Core Web Vitals and performance optimization for websites and online shops. en-US Mon, 27 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/content-visibility-skip-rendering-work/ https://www.pagespeed-optimierung.de/en/blog/content-visibility-skip-rendering-work/ content-visibility and CSS containment limit the rendering work of long pages to the visible area - with placeholder heights that avoid new layout shifts. Frontend-Optimierung Mon, 27 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/shared-dictionaries-delta-compression/ https://www.pagespeed-optimierung.de/en/blog/shared-dictionaries-delta-compression/ Compression dictionary transport per RFC 9842: how browsers and servers ship bundles as deltas against the previous version - patterns, configuration, fallback. Frontend-Optimierung Fri, 24 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/ai-crawler-load-server-performance/ https://www.pagespeed-optimierung.de/en/blog/ai-crawler-load-server-performance/ Bots generate over half of all HTML requests. Why AI crawlers hit uncacheable long-tail URLs, how to measure the load and throttle it instead of blocking. Server & Hosting Wed, 22 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/soft-navigations-spa-core-web-vitals/ https://www.pagespeed-optimierung.de/en/blog/soft-navigations-spa-core-web-vitals/ Single-page apps only report the first load to CrUX. How the Soft Navigations API from Chrome 151 measures route changes and splits LCP, INP and CLS per route. Core Web Vitals & Messung Mon, 20 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/reduce-dom-size-performance/ https://www.pagespeed-optimierung.de/en/blog/reduce-dom-size-performance/ Reduce DOM size: cut style and layout work with pagination, virtualization, content-visibility and flatter markup to improve INP and Core Web Vitals. Core Web Vitals & Messung Fri, 17 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/brotli-zstandard-text-compression-2026/ https://www.pagespeed-optimierung.de/en/blog/brotli-zstandard-text-compression-2026/ Brotli, Zstandard or Gzip for web compression in 2026: which method delivers the smallest transfer size and fastest response - static and dynamic alike. Server & Hosting Wed, 15 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/back-forward-cache-bfcache-optimization/ https://www.pagespeed-optimierung.de/en/blog/back-forward-cache-bfcache-optimization/ How the back/forward cache keeps whole pages in memory and makes back navigation instant: blockers, Cache-Control: no-store and testing in DevTools. Frontend-Optimierung Mon, 13 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/sustainable-websites-performance-co2/ https://www.pagespeed-optimierung.de/en/blog/sustainable-websites-performance-co2/ Sustainable websites: how fewer bytes, lean JavaScript and efficient caching cut the CO2 footprint while improving Core Web Vitals at the same time. Grundlagen & Strategie Fri, 10 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/page-speed-conversion-rate-revenue/ https://www.pagespeed-optimierung.de/en/blog/page-speed-conversion-rate-revenue/ 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. Shops & CMS Wed, 08 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/speculation-rules-instant-navigation/ https://www.pagespeed-optimierung.de/en/blog/speculation-rules-instant-navigation/ How the Speculation Rules API prefetches or prerenders next pages, tunes eagerness correctly, and avoids wasted prerenders and analytics side effects. Frontend-Optimierung Mon, 06 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/rum-vs-crux-field-data-performance-budgets/ https://www.pagespeed-optimierung.de/en/blog/rum-vs-crux-field-data-performance-budgets/ 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. Grundlagen & Strategie Fri, 03 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/fetchpriority-priority-hints-speed-up-lcp/ https://www.pagespeed-optimierung.de/en/blog/fetchpriority-priority-hints-speed-up-lcp/ How fetchpriority='high' loads the LCP image sooner: correct use, interplay with preload and srcset, the most common mistakes and the LCP quick win. Frontend-Optimierung Wed, 01 Jul 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/visual-stability-index-vsi-cls-successor-2026/ https://www.pagespeed-optimierung.de/en/blog/visual-stability-index-vsi-cls-successor-2026/ 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. Grundlagen & Strategie Mon, 29 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/progressive-image-loading-lqip/ https://www.pagespeed-optimierung.de/en/blog/progressive-image-loading-lqip/ LQIP, blur-up and responsive images for faster image build-up: better perceived and measured performance, fewer layout shifts, strong Core Web Vitals. Grundlagen & Strategie Fri, 26 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/server-side-rendering-hydration-performance/ https://www.pagespeed-optimierung.de/en/blog/server-side-rendering-hydration-performance/ SSR delivers HTML fast, but hydration costs performance. Islands, partial hydration and resumability for fast shops and strong Core Web Vitals. Grundlagen & Strategie Wed, 24 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/avoid-cumulative-layout-shift-cls-shop/ https://www.pagespeed-optimierung.de/en/blog/avoid-cumulative-layout-shift-cls-shop/ 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. Grundlagen & Strategie Mon, 22 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/resource-hints-preload-prefetch/ https://www.pagespeed-optimierung.de/en/blog/resource-hints-preload-prefetch/ How preload, prefetch, preconnect, dns-prefetch and priority hints shorten connection setup, speed up the LCP image and fonts -- and where over-loading hurts. Frontend-Optimierung Fri, 19 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/mobile-performance-optimization/ https://www.pagespeed-optimierung.de/en/blog/mobile-performance-optimization/ How throttled CPU, slow networks, viewport and touch shift mobile Core Web Vitals and which levers speed up your shop on the phone where revenue happens. Core Web Vitals & Messung Wed, 17 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/database-query-optimization-shop-performance/ https://www.pagespeed-optimierung.de/en/blog/database-query-optimization-shop-performance/ How indexes, resolving N+1 queries, query caching and EXPLAIN speed up slow database queries and lower the Time to First Byte of your online shop fast. Server & Hosting Mon, 15 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/third-party-scripts-performance-trimming/ https://www.pagespeed-optimierung.de/en/blog/third-party-scripts-performance-trimming/ Trimming third-party scripts: audit tags, defuse them with defer and lazy loading, use facades and measurably improve INP and LCP for better Core Web Vitals. Grundlagen & Strategie Fri, 12 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/cdn-edge-caching-shop-performance/ https://www.pagespeed-optimierung.de/en/blog/cdn-edge-caching-shop-performance/ How a CDN, edge caching and well-set cache-control headers cut Time to First Byte worldwide and keep your shop fast even far from the origin server. Server & Hosting Wed, 10 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/lazy-loading-code-splitting-performance/ https://www.pagespeed-optimierung.de/en/blog/lazy-loading-code-splitting-performance/ Lazy loading for images and components, route-based code splitting and dynamic imports cut initial JavaScript and improve Core Web Vitals on every page. Frontend-Optimierung Mon, 08 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/web-font-performance-optimization/ https://www.pagespeed-optimierung.de/en/blog/web-font-performance-optimization/ Web fonts cost load time and cause layout shifts. Learn how to optimize fonts with font-display, preload, subsetting and WOFF2 for fast pages. Frontend-Optimierung Fri, 05 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/http3-quic-shop-performance/ https://www.pagespeed-optimierung.de/en/blog/http3-quic-shop-performance/ HTTP/3 with QUIC cuts latency and connection setup time in online shops. How the protocol works, when migration pays off and how to enable it correctly. Grundlagen & Strategie Wed, 03 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/optimizing-inp-interaction-to-next-paint/ https://www.pagespeed-optimierung.de/en/blog/optimizing-inp-interaction-to-next-paint/ Optimizing INP: how to bring Interaction to Next Paint below 200 milliseconds. Targeted relief for long tasks, event handlers and third-party scripts. Core Web Vitals & Messung Mon, 01 Jun 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/reading-lighthouse-report-prioritizing-fixes/ https://www.pagespeed-optimierung.de/en/blog/reading-lighthouse-report-prioritizing-fixes/ How to read a Lighthouse report correctly: which five metrics weight the score, why opportunities act indirectly and how to prioritize by estimated savings. Core Web Vitals & Messung Fri, 29 May 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/video-performance-load-times-control/ https://www.pagespeed-optimierung.de/en/blog/video-performance-load-times-control/ Video as an underrated load-time driver: poster as LCP candidate, lean preload, modern codecs and facades for embedded players - so no video slows the page. Frontend-Optimierung Wed, 27 May 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/smooth-animations-stop-frontend-jank/ https://www.pagespeed-optimierung.de/en/blog/smooth-animations-stop-frontend-jank/ Smooth animations without jank: the 16.7 ms frame budget, why only transform and opacity stay cheap, and how to hunt down frontend jank in the DevTools. Frontend-Optimierung Mon, 25 May 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/core-web-vitals-2026/ https://www.pagespeed-optimierung.de/en/blog/core-web-vitals-2026/ Core Web Vitals 2026: INP replaces FID, updated thresholds and optimization strategies. How to measure and improve your scores systematically. Grundlagen & Strategie Sun, 24 May 2026 06:00:00 GMT https://www.pagespeed-optimierung.de/en/blog/ttfb-server-response-time/ https://www.pagespeed-optimierung.de/en/blog/ttfb-server-response-time/ Optimize Time to First Byte: identify causes of slow server response times and fix them systematically with DNS, TLS, backend and caching strategies. Grundlagen & Strategie Thu, 21 May 2026 06:00:00 GMT