With Android 5.0 Lollipop now winging its way to phones, Google has quietly made changes to Android's compiler tools as well. New for developers is a pair of compilers, code-named Jack and Jill, designed to speed up Android app creation.
Eric LaFortune, technical director of Saikoa, which creates software for optimizing and obfuscating Java and Android apps, found Jack and Jill in version 21.1 of the Android SDK Build Tools, released in October. According to LaFortune, Jack and Jill are part of "a new compiler toolchain to transform Java code into Dalvik bytecode," in part using "a new intermediate representation called Jayce."