Best Practices to Increase Angular App Performance in 2025

As web applications continue to evolve, ensuring optimal performance is critical for delivering a seamless user experience. Angular, a powerful front-end framework, provides numerous tools and techniques to build high-performance apps. In this article, I’ll share some best practices for optimizing your Angular applications in 2025.

1. OnPush Change Detection Strategy

By default, Angular uses the Default change detection strategy, which checks every component for changes. Switching to the OnPush strategy can significantly improve performance by limiting change detection to specific triggers.

How to Implement:

@Component({
  selector: 'app-optimized',
  templateUrl: './optimized.component.html',
  changeDetection: ChangeDetectionStrategy.OnPush
})
export class OptimizedComponent {
  // Component logic
}

2. Optimize Component Structure

Keep components lean by following a smart component and dumb component architecture. Smart components handle logic and service interactions, while dumb components focus solely on UI rendering.

3. Use Signals for State Management