An introduction to lazy evaluation and proxy objects

First and foremost, the techniques used in this chapter are used to hide optimizations in a library from the user of that library. This is useful because exposing every single optimization technique as a separate function requires a lot of attention and education from the user of the library.

It also bloats the code base with a multitude of specific functions, making it hard to read and understand. By using proxy objects, you can achieve optimizations under the hood; hence, the resultant code is, both, optimized and readable.

Lazy versus eager evaluation

Lazy evaluation is a technique used to postpone an operation until its result is really required. The opposite, where...