ART (Android Runtime) currently is an experimental feature and in the early stages of development. If you switch from Dalvik to ART on your device, it may break, force close some applications at the moment; however developers are updating their apps to ?x incompatibilities at impressive speed.
How to switch from Dalvik to ART in Android KitKat?
Since ART is an experimental feature, it is disabled by default on Android 4.4 KitKat. You can switch to ART from developer options menu in device’s settings.
To switch, go to “About” and tap the build number repeatedly. It will bring the Development menu. From development menu, select the ART option.
