Android to Include Ahead-Of-Time Compiler: @ InfoQ
"Android 'L' RunTime (ART) with an AOT compiler replaces the Dalvik virtual machine and its JIT compiler.
...In the new Android runtime the OS compiles bytecode to native machine code on the device at installation and stores the native code for later execution. The native code representation is larger both in permanent storage and in RAM on the device. Unlike with Dalvik and traditional JIT compilers, on the other hand, the compilation process does not need to be repeated on every application execution.
Google is claiming up to 200% performance improvements overall for ART over Dalvik"