Angular Signals Explained: Ending Unnecessary Recalculations ⚡ With traditional Zone.js change detection, updating any variable can cause unrelated getters and calculations to run again—even when their actual data hasn’t changed. This becomes a serious performance issue as your view grows with 10, 20, or more variables. Angular Signals solve this by making reactivity precise. A computed signal only runs when its dependent signal changes. Update a completely different variable? The computed value