Updating android to 2 2
When not handled right, background processing can needlessly consume RAM (and battery) and affect system performance for other apps.Since Android 5.0, has been the preferred way of performing background work in a way that's good for users.
When the device is stationary again, with screen off and on battery for a period of time, Doze applies the full CPU and network restrictions on alarms, and GPS/Wi-Fi scans.
It does precompilation only when then the device is idle and charging, saving time and battery by doing that work in advance.
One of the most tangible benefits of ART's JIT compiler is the speed of app installs and system updates.
Background processing is an essential part of most apps.
When handled right, it can make your user experience amazing — immediate, fast, and context-aware.