When your app grows, the size of the database also grows. Typically, there are many ways to handle large datasets such as paging, caching, and filtering. However, there is a very useful feature in Ionic that allows you to repeat through a large list of items without sacrificing performance. Ionic's collection-repeat is similar to AngularJs' ng-repeat. The main difference is its rendering mechanism. Most of the time, the app does not need to render thousands of items at once. So, collection-repeat accesses only a subset of the data and binds it to the current page, where it is visible to the user.