The proper way to manage software performance is to systematically plan for and predict the performance of the emerging software throughput the development process. This is important in embedded real-time systems where performance is an explicit, measurable requirement. Software Performance Engineering (SPE) is a comprehensive way of managing performance that includes principles for creating responsive software. This paper presents a set of simple techniques and industry examples that can be used to manage software performance (using an actual example from industry to illustrate key points).