For multiple readers
It's a puzzling, and unusual, mix.
。关于这个话题，同城约会提供了深入分析
"Cloning streams in Node.js's fetch() implementation is harder than it looks. When you clone a request or response body, you're calling tee() - which splits a single stream into two branches that both need to be consumed. If one consumer reads faster than the other, data buffers unbounded in memory waiting for the slow branch. If you don't properly consume both branches, the underlying connection leaks. The coordination required between two readers sharing one source makes it easy to accidentally break the original request or exhaust connection pools. It's a simple API call with complex underlying mechanics that are difficult to get right." - Matteo Collina, Ph.D. - Platformatic Co-Founder & CTO, Node.js Technical Steering Committee Chair，更多细节参见谷歌浏览器【最新下载地址】
优点：输出范围在 (0,1)，可以表示概率，详情可参考服务器推荐