ART: android runtime

https://source.android.com/devices/tech/dalvik/art.html
http://en.wikipedia.org/wiki/Android_Runtime
https://software.intel.com/en-us/blogs/2014/06/18/art-vs-dalvik-introducing-the-new-android-x86-runtime
http://www.netmite.com/android/mydroid/dalvik/docs/dexopt.html


At install time, ART compiles apps using the on-device dex2oat tool. This utility accepts DEX files as input and generates a compiled app executable for the target device.

[note] dexopt , dex optimizer
[note] odex, optimized dex