9.3 Prototyping is crucial

9.3.1 Prototype, then polish

• Make things work before working on low-level optimization

  • This makes the engineering process easier

• Abstraction is hard, and makes the codebase harder to work with

• It’s hard to identify bottlenecks up front

• It’s easier to spot mistakes when you have something that can run

9.3.2 The “UI first” approach

• helps when clarifying:

  • what the app is supposed to do

  • how the app is to work

  • what each team-member is to work on

• use “the least possible computation”

• focus on appearance and interactions