If you are interested in Android development, I highly recommend checking out Romain Guy’s post (Romain is an Android dev at Google) on profiling and optimizing an application.
All applications should ideally take at most 16 ms to execute one frame, achieving a smooth framerate of 60 frames per second. Romain goes over some crucial new tools like systrace and TraceView which work with Android Jellybean (4.1 and 4.2)
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