The problem compounds in pipelines. Each TransformStream adds another layer of promise machinery between source and sink. The spec doesn't define synchronous fast paths, so even when data is available immediately, the promise machinery still runs.
"completed": false,
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获批后的长期扩展临床数据显示，Vosoritide的生长促进效应可持续至少7年。
if (lines.length 0) yield lines;