if next2 == 68: # Left
Дмитрий Воронин
，这一点在heLLoword翻译官方下载中也有详细论述
The Web streams spec requires promise creation at numerous points, often in hot paths and often invisible to users. Each read() call doesn't just return a promise; internally, the implementation creates additional promises for queue management, pull() coordination, and backpressure signaling.
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