Competence is not writing 576,000 lines. A database persists (and processes) data. That is all it does. And it must do it reliably at scale. The difference between O(log n) and O(n) on the most common access pattern is not an optimization detail, it is the performance invariant that helps the system work at 10,000, 100,000 or even 1,000,000 or more rows instead of collapsing. Knowing that this invariant lives in one line of code, and knowing which line, is what competence means. It is knowing that fdatasync exists and that the safe default is not always the right default.
* @param arr 待排序数组
，更多细节参见新收录的资料
出租人违反前款规定的，承租人有权解除合同，并有权要求赔偿因此遭受的损失。。新收录的资料对此有专业解读
A special skill: /fd-deep that launches 4 Opus agents in parallel (inspired from GPT Pro’s parallel test-time compute1) to explore different angles: