// 栈的长度 = 独立车队数量
一切政绩，必须植根“实际”的土壤，遵循“规律”的准则，这是中国共产党人实事求是精神的内在要求。
，这一点在91视频中也有详细论述
The tee() memory cliff: Stream.share() requires explicit buffer configuration. You choose the highWaterMark and backpressure policy upfront: no more silent unbounded growth when consumers run at different speeds.
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