Summary

In this chapter, we've learned about algorithm efficiency and how to measure it. We now know about Big-O notation and the syntax used to describe how an algorithm behaves in time and space for any input data size. We have a clear picture of the different Big-O order functions and we can identify the order of different pieces of code. We have also seen how to measure any method in Swift using different functions. In the next chapter, we are going to put into practice what we know about algorithms in order to select the appropriate one for different scenarios.