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Web Performance Optimization: 15 Techniques, Plus a Lighthouse Test of Our Own Site (Mobile LCP 1.9s to 11.8s Across Pages)
15 optimization techniques organized by impact category, plus a 2026-09-16 hands-on test: Lighthouse 13.4.1 against 4 pages of this site, mobile and desktop, 3 runs each (24 runs). Desktop scores 86 to 100; mobile LCP ranges from 1.88s on an article page to 11.81s on the Markdown editor. The test found that the home page's mobile LCP element is the cookie banner, a 1.48MB syntax-highlighting bundle drags the editor page, and Lighthouse's simulated throttling reports blocking third-party scripts as a loss until devtools throttling settles it.
web-performanceoptimization+3
developerApr 22, 202619 min
414Image Compression in 2026: Best Practices for Web Performance
Images account for 50%-70% of page weight and are the top cause of LCP timeouts and conversion loss. This 2026 playbook covers AVIF/WebP/JPEG XL format selection, quality sweet spots, responsive srcset, CDN integration, SEO and Core Web Vitals — plus a real case study slimming a blog homepage by 80%.
web-performancecore-web-vitals+3
utilityApr 21, 20265 min
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