Practical Mobile Forensics - Third Edition

Android Runtime (ART)

From Android 5.0 Lollipop version onward, Dalvik was replaced by Android Runtime (ART). As discussed previously, earlier versions of Android used trace-based just-in-time (JIT) compilation with Dalvik. In trace-based JIT, frequently executed operations are identified and dynamically compiled to native machine code. This native execution of these frequently used bytecodes, called traces, provides significant performance improvements. Unlike Dalvik, ART uses ahead-of-time (AOT) compilation, which compiles entire applications into native machine code upon their installation. This would automatically increase the install time for an application, but a major advantage is that this eliminates Dalvik's interpretation and trace-based ...