FT App on Android & iOS
The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
。safew官方下载对此有专业解读
Платон Щукин (Редактор отдела «Экономика»)
"They're basically like a man-made forest," says Spencer.