Most smartphones these days are behemoths of power, almost as powerful as micro PCs in a pocket-sized form. While all that power is available at our fingertips, quite literally, however, that doesn't mean that our smartphones are running at maximum efficiency. In fact, many apps simply presume that they have full access to all CPU, memory, and storage. Multiply that by the number of apps you have installed and you get a sordid mess of performance black holes. Now, Baidu has come up with DU Speed Booster in a bid to clean all that up. We tried it out to see how well it works.