Abstraction is Expensive – Speculative Branches:

Ideally, you would like all of the abstractions you use to have aligned goals with your system. If you can buy a dependency that aligns with your goals, that’s great. If not, you will likely have to “massage” your dependencies to be able to do what you want. This is the first time an abstraction costs you. If you use the wrong database schema (or the wrong technology), you may find yourself scanning database tables when a different schema would do a single lookup. For a non-database example, if you make an electron-based computer game, it will likely be unplayably slow (but you will be able to build it in record time!).