
App developers can then much more easily use the emulator to develop/test apps that are natively ARM or have native ARM dependencies. This leverages Google's ARM to x86 translation technology, which enables running native ARM apps at a much higher speed than with the actual ARM system images. To address this, we've released P x86 system images that can also run apps with ARM native code.

This is one of the top reasons app developers still resort to physical devices.

Or, developers were forced to build or hunt down the x86 version in parallel. Previously, Android app developers who needed to develop/test Android apps that used native ARM libraries could not use the x86-based emulator system images, and were forced to use system images with full ARM emulation, which are over 10x slower than the x86-based system images. X86 system images with translation versus ARM system images
