Apologies if this has already been raised at some point, but I wanted to raise the idea of a basic standard library toolkit for operations on async iterators.

This would include versions of functions that are already in the standard library for non-async iterators, such as map, filter, zip etc. It could also include a merge function for async iterators, for example (this would yield items in whatever order they are yielded from from the constituent iterators).

There are, of course, open source libraries providing these functions. But in general there is far too wide a range of such libraries, and it is difficult to tell which ones are best maintained. For the most basic and universally useful of operations on async iterators, it would be far better if they were part of the standard library.