Abstraction

Computer science is, fundamentally, about abstraction and efficiency. A programmer would rather use high-level bricks to build a product than worry about low-level details. Regrettably, the use of high-level bricks often comes at a cost in efficiency, forcing programmers to worry about low-level details. Recently, many programming languages have begun to stress the importance of zero-cost abstractions: ways to construct high-level bricks with zero efficiency cost.