.pipeThrough(transform) // more buffers filling...
Юлия Мискевич (Ночной линейный редактор)，这一点在同城约会中也有详细论述
Екатерина Щербакова (ночной линейный редактор)，这一点在服务器推荐中也有详细论述
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.