Portfolio/PAGESPEED_VERIFICATION_REPORT.md

PageSpeed Verification Report

Date: 2025-01-25 Subtask: 2-4 - Verify PageSpeed scores meet >90% threshold Site: https://www.damjan-savic.com/

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Executive Summary

This report documents the PageSpeed verification for the Damjan Savić portfolio website. Due to network proxy restrictions blocking the PageSpeed Insights API, verification was conducted using:

1. Local Playwright-Lighthouse audits against dev server
2. Manual verification instructions for production site

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Local Development Environment Results

Tests run against http://localhost:3000 using Playwright-Lighthouse.

Homepage Performance by Locale

Locale	Performance	Accessibility	Best Practices	SEO
DE	48%*	94%	100%	83%*
EN	69%*	94%	100%	75%*
SR	57%*	94%	100%	83%*

*Note: Performance and SEO scores in dev mode are expected to be lower due to:

• No minification
• No code splitting optimization
• No cache headers
• Source maps included
• Hot Module Replacement (HMR) overhead

Critical Pages (German Locale)

Page	Performance	Accessibility	Best Practices	SEO
Homepage	68%*	94%	100%	83%*
About	48%*	92%	100%	83%*
Portfolio	56%*	95%	100%	83%*
Contact	47%*	100%	100%	83%*

Passing Categories (All Tests)

✅ Accessibility: All pages score 92-100% (threshold: 90%) ✅ Best Practices: All pages score 100% (threshold: 90%)

Core Web Vitals Tests

Test	Status	Notes
LCP (Largest Contentful Paint)	✅ PASS	Under 5000ms threshold
CLS (Cumulative Layout Shift)	✅ PASS	Under 0.25 threshold
Critical Resource Errors	✅ PASS	No critical errors detected
Images Lazy Loading	✅ PASS	Lazy loading implemented
Modern Image Formats	✅ PASS	WebP/AVIF detected

Known Issues in Dev Mode

1. JavaScript Bundle Size: 1.3MB in dev (expected, not minified)
2. SEO Score Lower: Missing some production-only optimizations
3. Performance Score Lower: Expected 30-40% difference from production

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Production Verification Instructions

Since the PageSpeed Insights API is blocked by network proxy, verify production scores manually:

Method 1: PageSpeed Insights Web Interface

1. Visit: https://pagespeed.web.dev/
2. Enter URL: https://www.damjan-savic.com/
3. Click "Analyze"
4. Record scores for Desktop and Mobile

Method 2: Chrome DevTools Lighthouse

1. Open Chrome and navigate to https://www.damjan-savic.com/
2. Open DevTools (F12)
3. Go to "Lighthouse" tab
4. Select: Performance, Accessibility, Best Practices, SEO
5. Choose "Mobile" or "Desktop"
6. Click "Generate report"

URLs to Test

URL	Locale
https://www.damjan-savic.com/de	German
https://www.damjan-savic.com/en	English
https://www.damjan-savic.com/sr	Serbian
https://www.damjan-savic.com/de/about	About (German)
https://www.damjan-savic.com/de/portfolio	Portfolio (German)
https://www.damjan-savic.com/de/contact	Contact (German)

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Expected Production Scores

Based on the optimizations already in place, production scores are expected to be significantly higher:

Current Optimizations (Verified in Codebase)

1. Image Optimization

   • AVIF and WebP formats configured
   • Multiple device sizes (640-2048px)
   • Lazy loading for below-fold images
   • Priority loading for hero images

2. Font Optimization

   • Font display: swap (prevents FOIT)
   • Font preloading configured

3. Resource Hints

   • Preconnect to fonts.googleapis.com
   • Preconnect to fonts.gstatic.com
   • DNS-prefetch to Supabase

4. Caching

   • Static assets: 1 year cache (immutable)
   • Next.js static files: Long-term caching

5. Code Optimization

   • Package import optimization (lucide-react, framer-motion, etc.)
   • Console removal in production
   • Static generation for all pages

6. Security Headers

   • HSTS with preload
   • Content-Security-Policy ready
   • X-Frame-Options
   • X-Content-Type-Options

Expected Production Scores

Category	Expected Desktop	Expected Mobile
Performance	85-95%	75-90%
Accessibility	90-100%	90-100%
Best Practices	95-100%	95-100%
SEO	90-100%	90-100%

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Recommendations for Score Improvement

If production scores don't meet the 90% threshold:

Performance

1. Optimize hero-portrait.jpg (identified as 2.9MB - needs compression)
2. Implement critical CSS inlining
3. Add loading="eager" to LCP image
4. Review third-party script loading (defer GA)

SEO

1. Add canonical URLs to all pages
2. Ensure hreflang tags are properly configured
3. Add breadcrumb structured data
4. Verify meta descriptions length (150-160 chars)

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Test Infrastructure

The following test files are available for ongoing verification:

File	Purpose
tests/e2e/performance.spec.ts	Playwright-Lighthouse performance audits
scripts/pagespeed-check.js	PageSpeed API verification (requires network access)
PERFORMANCE_BASELINE.md	Initial performance baseline documentation

Running Tests

# Run all performance tests (requires dev server)
npx playwright test tests/e2e/performance.spec.ts --project=chromium --workers=1

# Run Core Web Vitals tests only
npx playwright test tests/e2e/performance.spec.ts --grep="Core Web Vitals" --project=chromium

# Run Resource Loading tests only
npx playwright test tests/e2e/performance.spec.ts --grep="Resource Loading" --project=chromium

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Conclusion

Local Development Status:

• ✅ Accessibility: PASSES (92-100%)
• ✅ Best Practices: PASSES (100%)
• ⚠️ Performance: Expected low in dev mode (47-69%)
• ⚠️ SEO: Expected low in dev mode (75-83%)

Production Verification Required: Manual verification via PageSpeed Insights web interface is required due to API access restrictions.

Recommendation: Verify production site scores meet the 90% threshold using https://pagespeed.web.dev/ before marking this subtask as complete.

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Report generated by auto-claude performance verification