第 20 章 设计性能

Chapter 20 Designing for Performance

Up until this point, the discussion of software design has focused on complexity; the goal has been to make software as simple and understandable as possible. But what if you are working on a system that needs to be fast? How should performance considerations affect the design process? This chapter discusses how to achieve high performance without sacrificing clean design. The most important idea is still simplicity: not only does simplicity improve a system’s design, but it usually makes systems faster.

到目前为止，关于软件设计的讨论都集中在复杂性上。目标是使软件尽可能简单易懂。但是，如果您在需要快速的系统上工作，该怎么办？性能方面的考虑应如何影响设计过程？本章讨论如何在不牺牲简洁设计的情况下实现高性能。最重要的想法仍然是简单性：简单性不仅可以改善系统的设计，而且通常可以使系统更快。