Please let me know, how we can increase performance of android app.
One check would be if your app is leaking any memory
you can check this with adb command memifo. More information about it at->
http://developer.android.com/tools/debugging/debugging-memory.html#ViewingAllocations
Tracking down memory leaks http://macgyverdev.blogspot.in/2011/11/android-track-down-memory-leaks.html