Processing speed is an important skill of the cognitive system that allows the execution of various mental operations, ranging from seemingly simple perceptual abilities to highly complex problem-solving. Although some individuals perform faster than others, it has nothing to do with intelligence. It just reflects how fast a person can manage and effectively use information. Surely, we all would like to overcome our current processing speed and excel in our cognitive performance at work, studies or sports. The good news is that, far from having to repeat a task hundreds of times, there are new ways to get the brain to process faster and more efficiently. Today, the brain optimization phenomenon is not a question of imagination because scientifically it is already possible. But before considering increasing your processing speed, you may want to know how this technology really works in the brain and how realistic it can be.