The Android Hardware Abstraction Layer (HAL) is an interface for hardware vendors to implement that allows the Android application/framework to communicate with hardware-specific device drivers. The Android application uses HAL APIs to get service from hardware devices.
The moment you switch on a device, the expectation is there is absolutely no lag in display and output. Is this too much to ask for? Not anymore say experts. Many engineering companies, spending their valuable time and resources to develop solutions with shorter bootup time. With IoT being the center of all operations and various devices being operated simultaneously by one person at any given point of time, it becomes all the more imperative that all the devices and thus all the systems boot together and faster.