Apex admin template comes with AOT and Lazy Loading. With AOT, the browser downloads a pre-compiled version of the application. The browser loads executable code so it can render the application immediately, without waiting to compile the app first. With Lazy Loading, it allows you to load JavaScript components asynchronously when a specific route is activated.
Apex Angular 4+ Bootstrap Admin Template contains many example pages with many ready to use elements and easy to customize. You can choose from few premade layouts. This template comes with lots of popular UI components with a unified color scheme.