Worklog for task "Improve Lighthouse and Core Web Vitals metrics"

Progress as of 09/30/2026

The performance and quality baseline for the old website has been measured and saved.

The following laboratory metrics were recorded for the homepage:

• Mobile Performance: 54 (median of 3 runs)
• Desktop Performance: 67
• Accessibility: 58 / 58
• Best Practices: 73 / 77
• SEO: 100 / 100
• Mobile LCP: 26.17 s (median)
• Desktop LCP: 4.56 s
• Resource size: approx. 4.83–4.87 MB

Four Lighthouse reports have also been saved. These are laboratory measurements, not field Core Web Vitals.

On the new HAIH, the old prerender that blocked the production build has already been eliminated, and a request-time SSR fallback has been implemented. However, optimization of images, JS/CSS, caching, accessibility, and the Traefik → Varnish → Node production path has not yet been completed, and repeated Lighthouse measurements for the new version have not yet been recorded.

The next control milestone is to measure the new homepage and key commercial pages under identical conditions and consistently bring Performance/Accessibility/Best Practices up to target values without degrading SEO.