I have a Galaxy S4 i9500 and have started looking into Android development and custom ROMS to get a feel on how they are made, what changes they provide and to what they focus on. But I always end up with one question that has gone unanswered at least to my full understanding.
Whats is the difference between the Stock kernel (The one that comes in 4.2 or 4.3) and the Perseus and adam Kernels.
It terms of CPU usage, RAM usage, speed and Battery usage, in what do they differ. What do they offer that the stock or other versions do not?