And the other way is : The newest version of adt supports emulator snapshots, means you can just close the emulator and bring it back to where it was quickly. So to solve the performance problem simply close your emulator and restore it when you need it. For this you just check the attached screen-shots for identifying the steps we follow..
1.we have to enable that highlighted check-box,by default it is like
And make sure that the before launch we have to enable the highlighted check-boxes like...