C++ High Performance

Summary

In this chapter, you learned the difference between lazy evaluation and eager evaluation. You also learned how to use hidden proxy objects to implement lazy evaluation behind the scenes, meaning that you understood how to implement lazy evaluation optimizations while preserving an easy-to-use interface for your classes.

This makes writing optimized code much more readable and less error-prone, as the complex optimizations can be kept inside your library classes instead of having it exposed in the application code.