Using trackBy with ngFor in Angular dramatically improves list rendering performance by tracking items by unique identifier instead of object reference. As the creator of CoreUI with over 12 years of Angular experience since 2014, I’ve optimized countless lists with trackBy in enterprise applications. Angular’s trackBy function prevents unnecessary DOM manipulation when list items change, reducing re-renders and improving application responsiveness. This approach is essential for lists that update frequently or contain complex templates.

Rendering dynamic lists is fundamental in Angular applications, especially for dashboards, data tables, and any component displaying arrays of data. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented ngFor in countless Angular components including data tables, navigation menus, and dashboard widgets. From my expertise, the most efficient approach is to use the *ngFor structural directive with proper TypeScript typing. This method provides clean template syntax and excellent performance when combined with trackBy functions.