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TransformStream creates a readable/writable pair with processing logic in between. The transform() function executes on write, not on read. Processing of the transform happens eagerly as data arrives, regardless of whether any consumer is ready. This causes unnecessary work when consumers are slow, and the backpressure signaling between the two sides has gaps that can cause unbounded buffering under load. The expectation in the spec is that the producer of the data being transformed is paying attention to the writer.ready signal on the writable side of the transform but quite often producers just simply ignore it.
。夫子对此有专业解读
在集市上买了条罩衣围裙，15元。每次做完饭摘围裙时，像从手术台下来。以前，我扎那种半身围裙。这种带袖围裙，我只在婆婆家穿过一回。我娘家的女性很奇怪，除了我，她们都不爱扎围裙。这条围裙我超爱，有时一整天都穿着它，出门都不想脱。
"It blows my mind because you think 'if you just drive 30 minutes down the road, Lancashire is a major hub of manufacturing that's still going on now, people are producing things here'."