For implementers, backpressure adds complexity without providing guarantees. The machinery to track queue sizes, compute desiredSize, and invoke pull() at the right times must all be implemented correctly. However, since these signals are advisory, all that work doesn't actually prevent the problems backpressure is supposed to solve.
从后向前扫描已排序部分，找到插入位置，元素后移腾出空间
，更多细节参见91视频
Chained 3× transforms (8KB × 500)
For transforms that need cleanup on abort, add an abort handler:，这一点在搜狗输入法2026中也有详细论述
Collect your free Wendy’s chili on Feb. 26。旺商聊官方下载是该领域的重要参考
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