Why Mastering Computer Fundamentals Is the Best Investment for Programmers

This article is the foreword written by Lai Yonghao, founder of the Little Red Flower Technology Leaders Club, for the first volume of "Write Great Code" (the Chinese edition of "Programming Excellence").

Looking back at the manuscript of the new edition, the author notes that while technologies like assembly language and WebAssembly have resurfaced, the programmer's fundamental skills continue to be the biggest differentiator, making deep understanding of computers the highest‑return investment.

The book, the first volume of a four‑volume series, covers topics from numeric representation, binary arithmetic, and bit operations to floating‑point and character encoding, memory organization, CPU architecture, instruction sets, and I/O, highlighting their advantages, drawbacks, and bottlenecks.

Rather than teaching specific optimizations, the author points out where pitfalls lie, stressing that even if you cannot optimize, you must at least prevent code degradation. He cites the C++ Coding Guidelines' advice to avoid code decay and stresses that optimization should occur after code stabilizes, while preventing decay must be continuous.

Through personal anecdotes—starting from school, through university, and early career at NetEase's gaming division—the author illustrates how neglecting fundamentals led to difficulties, and how revisiting low‑level concepts helped rebuild confidence and technical growth.

He concludes that reading "Write Great Code" greatly reduces the risk of falling into code decay traps and reinforces the importance of a solid foundation for achieving great software engineering results.