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Audit Date: July 30 – August 4, 2026
Performance Evidence Record
Laboratory Performance & Core Web Vitals Log
Detailed test environments, Lighthouse 12.0 scores, FCP/LCP/CLS measurements, reproduction scripts, and known audit scope disclaimers.
Concept Clarification: Lab Scores vs. Field Web Vitals
The metrics reported below are synthetic laboratory measurements captured under emulated CPU and network throttling. Laboratory scores allow consistent regression testing during development. Field metrics (Chrome User Experience Report / CrUX) measure real user experiences across diverse devices and network connections.
Test Environment & Metadata Verification Matrix
| Audit Parameter | Verification Specification / Result |
|---|---|
| 1. Test Date | July 30, 2026 (Initial Audit) & August 4, 2026 (Verification Run) |
| 2. Test Environment | Chrome 127.0.6533.100 (64-bit), Windows 11 Pro, Node.js v20.11.0 runtime |
| 3. Tools Used | Google Lighthouse CLI v12.0.0, Chrome DevTools Performance Profiler, WebPageTest CLI |
| 4. Pages Tested | /, /about, /projects, /services, /projects/dice-roller, /projects/nepal-construction-platform, /projects/developer-portfolio |
| 5. Viewport Configurations |
Desktop: 1920x1080 Viewport, Unthrottled CPU, Cable Network. Mobile: Moto G Power (360x840 DPR 2.0), 4x CPU Throttling, Fast 4G Network (1.638 Mbps down, 750 Kbps up, 150ms RTT). |
| 6. Measured Results |
Lighthouse Performance Score: 98–99 / 100 (Desktop & Mobile). First Contentful Paint (FCP): 0.4s – 0.6s. Largest Contentful Paint (LCP): 0.75s – 0.85s. Total Blocking Time (TBT): 0ms. Cumulative Layout Shift (CLS): 0.000. |
| 7. Known Limitations | Lab benchmarks reflect a static host environment with edge CDN caching. Real-world mobile user performance may vary based on local ISP latency, browser extension overhead, and regional network congestion. |
| 8. Reproduction Instructions |
Run the following terminal command locally:npx lighthouse https://adrinshrestha.com.np --preset=desktop --only-categories=performance --output=html --output-path=./report.html
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| 9. Repository Commit / Tag | Release Tag: v2.0.0-release | Commit: 6ee17094 |