Make it faster

The new, shiny app you built solves all the problems of your business. However, as time goes, as new features are added, it's been getting slow. Your manager has noticed and asks you to make it faster. Where do you start? What can you do? Before you start thinking about rewriting feature (or worse, the whole app) from scratch, we'll see how you can profile, benchmark, and restructure tiny parts of your application to make it much faster.