IIRC the history of the async things in TLA in order: Twisted (callbacks), Eventlet (for Second Life by Linden Labs), tornado, gevent; gunicorn, Python 3.5+ asyncio
The Async/await keywords were in F# (2007), then C# (2011), Haskell (2012), ... Python (2015), and JS/ES ECMAScript (2017) FWICS from the wikipedia article.
When we talk about concurrency and parallelism, what are the different ~async patterns and language features?
Necessarily, we attempt to define such terms but the implementations of the now more specifically-named software patterns have different interpretations of same, so what does Wikipedia have or teach on this is worth the time.
If you want to write the history of Python async things in order, you'll need to put Twisted in many more of the places: it was callbacks only in the very beginning, then worked via generators, and once Python added async syntax used that. "Twisted (callbacks)" is a simplification that ignores the influence Twisted has had even on non-Python ecosystems; Deferreds have been imitated all over the place.
Before callbacks, there were function pointers and there was no Garbage Collection; And before function pointers, there were JMPs, trampolines, and labels in ASM.
I don't share any reverence for the Twisted callback patterns that AJAX also implements. And, the article isn't about callbacks.
> The async function declaration creates a binding of a new async function to a given name.
> The await keyword is permitted within the function body, enabling asynchronous, promise-based behavior to be written in a cleaner style and avoiding the need to explicitly configure promise chains
