Every fragment means promises created for read() calls, promises for backpressure coordination, intermediate buffer allocations, and { value, done } result objects — most of which become garbage almost immediately.
Sync/async separation，更多细节参见heLLoword翻译官方下载
也有人实名羡慕“天生好运，这种好事从来轮不到我，恭喜楼主好好享受”；还有人开玩笑“他有内存！抓住他！”；，更多细节参见51吃瓜
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