做那件让你睡不着觉的事，那件充满未知的事，那件一会儿显得荒谬、一会儿显得天才的事。那才是你应该做的。
A difficulty here, however, is that the TransformStreamDefaultController does not have a ready promise mechanism like Writers do; so the TransformStream implementation would need to implement a polling mechanism to periodically check when controller.desiredSize becomes positive again.
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The spec does not mandate buffer limits for tee(). And to be fair, the spec allows implementations to implement the actual internal mechanisms for tee()and other APIs in any way they see fit so long as the observable normative requirements of the specification are met. But if an implementation chooses to implement tee() in the specific way described by the streams specification, then tee() will come with a built-in memory management issue that is difficult to work around.，推荐阅读同城约会获取更多信息
It is worth mentioning that the C library malloc might be using and caching
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