Re: [streams] First draft at tee algorithms, for critique (#302)

@annevk agreed.

One thing I forgot to mention: I think people who are "response focused" will likely not touch body, and will do `res.clone()` and `res.json()` etc. So the mutation of `.body` will not matter to them. Whereas people with "stream focused" use cases will do e.g. `const [branch1, branch2] = res.body.tee()` and other things that involve understanding and manipulating the stream.

---
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/streams/pull/302#issuecomment-83426197