A circuit that can remember a single 0 or 1, grown step by step into a register — and why cache, not clock speed, is what makes a gaming CPU fast.

一个电路怎么记住一件事情？从两个非门互相提醒，到寄存器，再到决定游戏性能的缓存，底层其实是同一个朴素的问题。