# PageSpeed Verification Report

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

---

## 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

---

## 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

---

## 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) |

---

## 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%         |

---

## 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)

---

## 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

```bash
# 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
```

---

## 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.

---

*Report generated by auto-claude performance verification*
