[whatwg/fetch] Use tasks to manipulate streams (#1270)

Helps with #1246.

The main problem with this PR (which is why I marked it WIP) is that the stream itself is created in parallel and I don't see a good way to avoid that. If we had low-level streams this would be different.

<!--
Thank you for contributing to the Fetch Standard! Please describe the change you are making and complete the checklist below if your change is not editorial.
-->

- [ ] At least two implementers are interested (and none opposed):
   * …
   * …
- [ ] [Tests](https://github.com/web-platform-tests/wpt) are written and can be reviewed and commented upon at:
   * …
- [ ] [Implementation bugs](https://github.com/whatwg/meta/blob/main/MAINTAINERS.md#handling-pull-requests) are filed:
   * Chrome: …
   * Firefox: …
   * Safari: …

(See [WHATWG Working Mode: Changes](https://whatwg.org/working-mode#changes) for more details.)

You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/fetch/pull/1270


-- Commit Summary --

  * Use tasks to manipulate streams

-- File Changes --

    M fetch.bs (94)

-- Patch Links --

https://github.com/whatwg/fetch/pull/1270.patch

https://github.com/whatwg/fetch/pull/1270.diff


-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/fetch/pull/1270