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// Storage write is slow — meanwhile, the entire stream
,这一点在旺商聊官方下载中也有详细论述
Not all streaming workloads involve I/O. When your source is in-memory and your transforms are pure functions, async machinery adds overhead without benefit. You're paying for coordination of "waiting" that adds no benefit.
题目要求弹出条件找「右侧第一个 cur」的元素弹出所有 ≤ cur 的元素找「右侧第一个 ≥ cur」的元素弹出所有 < cur 的元素找「右侧第一个 < cur」的元素弹出所有 ≥ cur 的元素找「右侧第一个 ≤ cur」的元素弹出所有 cur 的元素