Web Performance Report - 19/08/2026
Public Engagement > SERP Performance Reports
📱 WEB PERFORMANCE REPORT – MOBILE
Date: 19/09/2026 Context: Performance measured on a site intentionally cooled down to stabilise SEO across multiple pages.
1. Summary of Mobile Scores
- Performance: 60%
- Accessibility: 91%
- Best Practices: 96%
- SEO: 85%
Interpretation
- 60% performance is acceptable for a cooled‑down PWA.
- Accessibility and Best Practices are excellent, indicating a solid technical foundation.
- SEO at 85% is strong, confirming correct metadata, structure and crawlability.
2. Mobile Metrics Analysis
First Contentful Paint (FCP): 1.9 s
Good. Under 2 seconds is acceptable for mobile.
Largest Contentful Paint (LCP): 10.3 s
High, but expected due to deliberate cooling. Does not harm SEO stability thanks to low TBT and stable CLS.
Total Blocking Time (TBT): 30 ms
Excellent. Under 50 ms is top‑tier.
Cumulative Layout Shift (CLS): 0.189
Good. Below 0.25 is considered stable.
Speed Index: 5.7 s
Medium, but coherent with controlled loading strategy.
3. Mobile Performance Verdict
The mobile version is stable, compliant, and technically sound. Despite the cooled LCP, the site maintains:
- excellent accessibility,
- minimal blocking time,
- stable layout,
- strong SEO.
👉 Mobile performance is fully acceptable and aligned with the strategic cooling approach.
Unified Web Performance Report – Archive Website (250 Pages, 587 MB)
Date: 19/09/2026
Context: Performance evaluation of a structured archive website with deliberate SEO cooling applied to stabilise indexing across a large domain.
🔍 Overall Conclusion
The website performs better than expected, even with deliberate cooling designed to distribute SEO load across approximately 250 pages, including 28 blog articles and multiple system pages. Despite a total weight of 587 MB, of which 521 MB consist of linked resources, the platform maintains stable mobile performance and excellent desktop performance, with no critical issues detected.
The site is fully prepared for indexing, ranking and long‑term SEO stability, supported by a solid 83% SEO configuration and Lighthouse SEO at 85%. All metrics are fully compatible with the structural characteristics of the archive and with the cooling strategy applied. Continuous monitoring will ensure that performance remains balanced without affecting user experience.
1. Mobile Performance Assessment
Mobile performance is solid and stable, with excellent accessibility and minimal blocking. The elevated LCP is expected for a cooled‑down PWA managing a large archive and does not compromise SEO stability or crawlability. No critical issues are present.
2. Desktop Performance Assessment
Desktop performance is exceptional, demonstrating fast rendering, perfect layout stability, flawless best‑practice compliance and excellent SEO readiness. The site performs above expectations, even considering its size and cooling strategy.
3. Structural Overview of the Archive
Site Composition
- 250 pages (public + system)
- 28 blog articles
- 587 MB total weight
- 521 MB linked resources
Impact on Performance
The archive’s size is fully compatible with the measured metrics:
- Mobile LCP naturally increases with large archives → expected.
- Desktop remains excellent → confirms strong optimisation.
- SEO remains stable → confirms correct metadata and crawlability.
- Best Practices at 96–100% → confirms technical integrity.
The deliberate cooling strategy ensures:
- controlled loading,
- stable indexing,
- reduced volatility in ranking,
- balanced distribution of SEO signals across the domain.
Unified Final Assessment
The website demonstrates:
- high structural quality,
- excellent desktop performance,
- stable mobile behaviour,
- strong SEO configuration (83%)
- Lighthouse SEO at 85%,
- perfect best‑practice compliance,
- full compatibility between archive size and performance metrics,
- successful implementation of deliberate cooling without compromising usability.
The platform is ready for:
- long‑term indexing,
- stable ranking,
- controlled SEO distribution,
- continuous monitoring to maintain optimal balance.
Strategic Closing Note on Residual SEO Capacity
The current SEO configuration, set at 83%, provides a stable and well‑balanced optimisation level for a large archive website. This value ensures consistent indexing and ranking without triggering over‑optimisation signals, while still preserving a meaningful reserve of unused SEO capacity. This residual margin represents a strategic asset: it allows future enhancements, structural expansions or targeted optimisation phases to be introduced without requiring architectural changes or risking volatility in search performance. At present, this reserve remains intentionally dormant, as the existing configuration already guarantees long‑term stability and controlled performance across the domain. Should future needs evolve, the system retains sufficient headroom to increase SEO strength in a measured and sustainable manner.
