What's the Level of Compilation That Happens?

Rolo: There's several levels of compilation that end up happening before your actual application gets run. If you're an Android developer, you're probably writing your app with either Java or Kotlin and compiling that into a class file. And then what happens is like you assemble all these libraries and modules together in your application. Rolo: The profiles that Rolo is talking about is the compilation at that very last stage where it takes dex files and compiles it into machine code that your device actually runs.