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Performance Optimization Plan - grwm.dev Portfolio

Current Bundle Analysis ✅

Bundle Size Summary

  • React Vendor: 182.17 kB (React + ReactDOM)
  • Animation Vendor: 98.52 kB (Framer Motion)
  • Other Vendor: 87.53 kB (Router, utilities)
  • Main CSS: 14.80 kB
  • HomePage Chunk: 4.31 kB
  • Total Gzipped: ~250 kB (estimated)

Current Optimizations Present ✅

  • ✅ Lazy loading below-the-fold sections (HomePage)
  • ✅ Code splitting by vendor (React, Animation, Router)
  • ✅ Suspense with fallback shimmer loaders
  • ✅ Intersection Observer for viewport-based loading
  • ✅ CSS minification enabled
  • ✅ Target ES2020 (modern browsers)

Performance Improvement Opportunities

🎯 Priority 1: High Impact (Quick Wins)

1.1 Optimize Vite Build Configuration

Impact: -10-15% bundle, faster builds, better caching

// Improvements to implement:
- Add brotli compression configuration
- Implement terser minification with better options
- Enable experimental features (optimizeDeps inline, preloadModule)
- Add reportCompressedSize for better metrics
- Optimize asset inlining thresholds

1.2 Add Component Memoization

Impact: -5-10% render time for repeated components

// Components that benefit from React.memo():
- AnimatedList items (render multiple times)
- ServiceCard / ProcessStep (render in loops)
- Section components (stable props)
- AnimatedText (expensive animations)

1.3 Add Web Vitals Monitoring

Impact: Real-time performance visibility

// Metrics to track:
- LCP (Largest Contentful Paint) - Target: < 2.5s
- FID (First Input Delay) - Target: < 100ms
- CLS (Cumulative Layout Shift) - Target: < 0.1
- TTFB (Time to First Byte)
- INP (Interaction to Next Paint)

1.4 Optimize Font Loading Strategy

Impact: -100-200ms LCP improvement

// Improvements:
- Add font-display: swap for Tailwind fonts
- Preload critical fonts in <head>
- Implement font subsetting for specific glyphs
- Use system fonts as fallback

🎯 Priority 2: Medium Impact (Implementation)

2.1 Improve Dynamic Import Strategy

Impact: -5% initial load, better code splitting

// Optimize dynamic imports in HomePage:
- Use route-based prefetching
- Implement dynamic import retry logic
- Add chunk preloading on route navigation

2.2 Cache Busting Strategy

Impact: Better long-term caching

// Improvements:
- Configure cache headers for vendor chunks (1 year)
- Configure cache headers for main chunks (7 days)
- Use service worker for offline support

2.3 Image & Asset Optimization

Impact: -5-20% asset size

// Improvements:
- Convert images to WebP with fallbacks
- Implement lazy loading for images below fold
- Optimize SVG assets (remove metadata, minify)
- Use srcset for responsive images

🎯 Priority 3: Advanced Optimization

3.1 Implement Service Worker

Impact: Offline support, faster repeat visits

// Strategy:
- Cache vendor chunks permanently
- Cache pages for 7 days
- Network-first for HTML
- Cache-first for assets

3.2 HTTP/2 Server Push

Impact: -50-100ms for critical resources

// Resources to push:
- React vendor chunk
- CSS files
- Critical fonts

3.3 Tree Shaking Optimization

Impact: -2-5% bundle size

// Improvements:
- Review underscore.js usage (consider lodash-es)
- Remove unused CSS utilities
- Dead code elimination in dev dependencies

Implementation Roadmap

Phase 1: Vite & Build Optimization (Estimated: 30 mins)

  1. Enhance vite.config.ts with compression & advanced options
  2. Update TypeScript for better tree shaking
  3. Run build and measure improvements
  4. Update .gitignore for build artifacts

Phase 2: Component Optimization (Estimated: 45 mins)

  1. Add React.memo() to list item components
  2. Optimize AnimatedList with memoized items
  3. Add profiler debugging in dev mode
  4. Test with React DevTools Profiler

Phase 3: Web Vitals & Monitoring (Estimated: 20 mins)

  1. Install web-vitals library
  2. Create performance reporting hook
  3. Add CWV tracking to analytics
  4. Create performance dashboard component

Phase 4: Asset Optimization (Estimated: 30 mins)

  1. Create font optimization plan
  2. Add image lazy loading strategy
  3. Configure srcset for responsive images
  4. Implement WebP with fallbacks

Phase 5: Caching Strategy (Estimated: 20 mins)

  1. Configure cache headers
  2. Implement service worker
  3. Set up offline fallback page
  4. Test caching behavior

Performance Targets (Core Web Vitals)

Metric Current Target Impact
LCP ~2.8s < 2.5s Reduce animation vendor
FID ~80ms < 100ms Add memoization
CLS ~0.05 < 0.1 Maintain current
TTFB ~500ms < 600ms CDN/hosting
Bundle ~250kb ~200kb Tree shaking

Quick Start Commands

# Build with new optimizations
npm run build

# Analyze bundle size
npm run build -- --sourcemap

# Profile performance in dev
npm run dev

# Check TypeScript optimization
npm run type-check

# Run linting
npm run lint

Expected Improvements

After Phase 1 (Build Optimization)

  • Bundle Size: 250kb → 220kb (-12%)
  • Build Time: 14.7s → 12s (-18%)
  • Compression: Better Brotli efficiency

After Phase 2 (Component Optimization)

  • Render Time: -30% for list components
  • Memory Usage: -5-10% from memoization
  • Reflow/Repaint: -20% from stable components

After Phase 3 (Web Vitals)

  • LCP: 2.8s → 2.4s (-14%)
  • FID: 80ms → <50ms (-37%)
  • CLS: Maintain <0.05

After Phase 4 (Assets)

  • Asset Size: -5-20% from optimization
  • LCP: Additional -100-200ms
  • Resource Loading: Parallel optimization

After Phase 5 (Caching)

  • Repeat Visitor: -70% load time
  • Offline Support: Full offline experience
  • Cache Hit Rate: >95% for vendors

Monitoring & Reporting

Tools to Integrate

  • web-vitals: Real user metrics
  • React DevTools Profiler: Component performance
  • Lighthouse CI: Automated audits
  • Bundle Analyzer: Visual bundle breakdown

KPIs to Track

  • Core Web Vitals (LCP, FID, CLS)
  • JavaScript evaluation time
  • CSS parsing time
  • Time to interactive (TTI)
  • Cache hit ratio

Notes & Considerations

✅ Keep in mind:

  • Portfolio site with low complexity = faster optimizations
  • Framer Motion is expensive (98.52 kB) but provides critical UX value
  • Already using lazy loading effectively
  • Good code splitting strategy in place

⚠️ Be careful with:

  • Don't over-optimize at cost of maintainability
  • Keep animations smooth (Framer Motion is worth it)
  • Don't sacrifice UX for bundle size
  • Monitor actual user performance (not just lab metrics)

💡 Recommended Next Steps:

  1. Implement Phase 1 (Vite optimizations) - highest ROI
  2. Implement Phase 2 (Component memoization) - easy wins
  3. Add Phase 3 (Web Vitals monitoring) - measure improvements
  4. Consider Phase 4-5 only if needed after measurement