High performance applications always bring better user engagement and experience. We often implicitly judge the quality of given application by it’s initial load time and responsiveness. In the world of the single-page applications we usually have to transfer huge amount of resources over the wire which dramatically impacts the initial load time. On top of that, performing change detection over the entire component tree, corresponding to a complex UI, often causes frame drops because of heavy computations happening in the main thread. In the first part of this talk we’re going explain essential practices that can help us reduce the initial load time of our Angular applications.