Smaller & Faster Apps- Angular 4 applications is smaller and faster in comparison
with Angular 2.

View Engine Size Reduce – Some changes under to hood to what AOT generated code compilation means in Angular 4, improved the compilation time. These changes are reduced around 60% size in most of the cases.

Animation Package – Animations now have their own package i.e. @angular/platform-browser/animations

Improvement – Some Improvement on *ngIf and *ngFor.

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