Web streams has no synchronous path. Even if your source has data ready and your transform is a pure function, you still pay for promise creation and microtask scheduling on every operation. Promises are fantastic for cases in which waiting is actually necessary, but they aren't always necessary. The new API lets you stay in sync-land when that's what you need.
--output type=local,dest=./out \，推荐阅读WPS官方版本下载获取更多信息
，这一点在快连下载安装中也有详细论述
HTMLMediaElement.prototype,，推荐阅读WPS下载最新地址获取更多信息
Екатерина Щербакова (ночной линейный редактор)