We are reaching the end of our journey. Our game is looking great. Performance, however, is poor. Our impressive graphics engine moves at a sluggish pace, making the final product unplayable. Too often, developers code with a high-end configuration in mind, and thus the complete product slows down in less powerful equipment. If this is your situation, time has clearly come for some performance tuning. Be prepared to spend long hours of hard work that will recover those lost frames-per-second and make your game come back from the land of the dead.