These optimizations are difficult to implement, frequently error-prone, and lead to inconsistent behavior across runtimes. Bun's "Direct Streams" optimization takes a deliberately and observably non-standard approach, bypassing much of the spec's machinery entirely. Cloudflare Workers' IdentityTransformStream provides a fast-path for pass-through transforms but is Workers-specific and implements behaviors that are not standard for a TransformStream. Each runtime has its own set of tricks and the natural tendency is toward non-standard solutions, because that's often the only way to make things fast.
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晨起第一件事喝熱水、居家穿棉拖鞋、熬制蘋果銀耳湯……這些在華人、華裔中常見的行為逐漸開始風靡TikTok和Instagram，來自不同國家的年輕人開始效仿，戲稱自己正在「成為中國人」。