The Android operating system offers a developer option that influences the persistence of background processes. When enabled, this setting prevents the system from retaining activity instances in memory once the user navigates away from them. For example, if a user opens an application, browses through several activities, and then switches to a different application, enabling this setting will cause those activities to be destroyed. The next time the user returns to the original application, the activities will be recreated from scratch, effectively resetting the application state to the initial launch state.
This feature is primarily intended for developers during application testing and debugging. By forcing the system to recreate activities frequently, developers can identify and address potential issues related to state management, memory leaks, and lifecycle handling. It simulates scenarios where the application might be terminated by the system due to low memory conditions, ensuring that the application can gracefully handle such situations without data loss or unexpected behavior. Historically, this setting has allowed developers to focus on writing more resilient and memory-efficient code.