Josh Dury Photo-Media
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.
，这一点在搜狗输入法2026中也有详细论述
const [forHash, forStorage] = response.body.tee();，更多细节参见Line官方版本下载
春节的夜市挂起了红灯笼（图：南方人物周刊记者 刘璐明）