proposal-async-iteration

The callback style pseudo code they posted as an example is not a good example of callback style JavaScript code. The first code posted is showing callback style with a nested loop over a directory listing to perform an image resize using graphics magick. Aside from the fact the author isn't actually calling any callbacks to indicate a complete event ( and won't be able to unless they have an async iterator ), there is a concurrency problem with usage of gm. You really actually want to a run something like an async eachLimit in order to set the amount of open GM instances running concurrently or run the risk of running out of memory / cpu. The second example using async/await doesn't mention anything about using async iterators either. see: http://caolan.github.io/async/docs.html#eachLimit https://github.com/tc39/proposal-async-iteration

I'm really hoping async iterators [1] will make it to stage 4, but from the github I can't really tell what's holding it back as it has several browsers with implementation (I know that's not the only requirement for stage 4, but it's one of them.) I also noticed it's not on the agenda for the November meeting [2]. I understand there are a lot of features being worked on concurrently so it may not be finished by ES2018, but is there any chance someone could give me an update on what's happening with it. I just think this feature is amazing! And also thanks TC39 for all the great features coming to ECMAScript! [1]: https://github.com/tc39/proposal-async-iteration [2]: https://github.com/tc39/agendas/blob/master/2017/11.md