│ └─────┬─────┘
Stream.pull() creates a lazy pipeline. The compress and encrypt transforms don't run until you start iterating output. Each iteration pulls data through the pipeline on demand.，这一点在同城约会中也有详细论述
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Медведев вышел в финал турнира в Дубае17:59，更多细节参见91视频
The chained transform result is particularly striking: pull-through semantics eliminate the intermediate buffering that plagues Web streams pipelines. Instead of each TransformStream eagerly filling its internal buffers, data flows on-demand from consumer to source.