Creating efficient reactive calculations and data transformations is crucial for building performant Vue applications with complex business logic and dynamic user interfaces. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented computed properties in numerous Vue components for filtering data, formatting displays, and calculating derived values in dashboards. From my expertise, the most powerful approach is to use computed properties which provide automatic caching and dependency tracking. This method ensures calculations only run when their dependencies change, optimizing performance compared to methods or watchers.