PERFORMANCE.md

Performance Optimization Guide

Bundle Analysis

To analyze your bundle size and find optimization opportunities:

npm run analyze

This will build the production version and open the bundle analyzer in your browser.

Performance Best Practices

1. OnPush Change Detection

Consider implementing OnPush change detection strategy for components that don't need frequent updates:

@Component({
  selector: 'app-example',
  changeDetection: ChangeDetectionStrategy.OnPush,
  // ...
})
export class ExampleComponent {
  // ...
}

2. TrackBy Functions

For large lists in templates, use trackBy functions:

trackByFn(index: number, item: any): any {
  return item.id; // or item if item is a primitive
}

3. Lazy Loading

Components are already set up for lazy loading. Consider splitting large components further.

4. Memory Leaks Prevention

• Always unsubscribe from observables (already implemented in CompareComponent)
• Use async pipe when possible
• Avoid creating functions in templates

5. Bundle Optimization

• Use Angular's built-in tree shaking
• Consider using Angular's service worker for caching
• Enable gzip compression on your server

Performance Monitoring

Build Analysis

# Check bundle sizes
npm run build:prod

# Analyze bundle composition
npm run analyze

Runtime Performance

Use Chrome DevTools:

1. Performance tab for runtime analysis
2. Memory tab for memory leaks
3. Network tab for loading performance

Recommendations for This Project

1. Implement OnPush strategy for components that primarily display data
2. Add trackBy functions for tree tables and lists
3. Consider virtual scrolling for large datasets
4. Implement service worker for offline functionality
5. Add loading states for better UX
6. Optimize images and use lazy loading for assets