Very useful tips on StackOverflow on how to speedup android emulator.
Couple of older articles on the same lines:
1) https://www.infinum.co/the-capsized-eight/articles/is-your-android-emulator-just-too-slow
2) http://www.javacodegeeks.com/2013/12/android-boost-up-the-android-emulator-speed-up-to-400-on-intel-based-architecture.html
