[ng12]

Android uses Dalvik/ART, which is an alternative to the JVM that has an entirely different set of optimizations for mobile. The most important one is that object creation is significantly more expensive -- if your code is allocating lots of objects it will significantly impact performance. This is why Android has the whole Recycler paradigm. My gut reaction is that Effective Java recommends a lot of heavy-OO practices which may impact Android performance.