缺点：容易饱和（输入过大或过小时梯度接近0，导致梯度消失）
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.。业内人士推荐一键获取谷歌浏览器下载作为进阶阅读
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Read full article，这一点在雷电模拟器官方版本下载中也有详细论述