I answered the quiz and it said "you must be a Javascript developer", which is true enough - that's probably my second-most-proficient language. In fact, I'm a Ruby developer partially because I hate the idea of async/await and I'm feeling very smug about my choice after reading this.
Some of these design decisions seem indefensible to me. For example, what the authors call "Suspension":
-> Static: Await points guaranteed to suspend -- JavaScript
-> Dynamic: No guarantees on awaiting tasks -- C# · Swift · Tokio · Smol · Asyncio · Trio
What is "await" if not a synonym for "suspend"?!?
async/await is one product of a long line of thought that says "threads are too hard for programmers to get right". Threads (really, shared memory) have real usability issues for developers, but once you grok the semantics (which largely map to the physical execution model in a CPU) that knowledge is transferrable across virtually all languages and runtimes.
> What is "await" if not a synonym for "suspend"?!?
There are scenarios where something might need to await and might not. Why take the hit if you are able to do something synchronously? Edit: this is especially important given the “viral” nature of colored functions.
It does make it hard to reason about, but this kind of problem is all over the place - e.g. very similar-looking code can have very different semantics depending on your framework if you’re using jsx or a particular decorator means one thing in one project and something else in another. That’s just part of the game at this point.
I'm teaching async calls in makearcade to my 10yo son, to bypass a platform bug. He said he doesn't get it. My answer was: Don't worry, adults don't get it either.
With these dimensions of design variance defined, you could also make a closeness measure in 9-dimensional space and identify the most or least similar combos.
Also a great teaching tool, if someone knows one async system, to be able to show them the differences on each axis from their prior one to a new one they’re learning.
Amazing work. It's one thing to say "async is complex". It's another to parse that statement so carefully as to have a cross-language theory of async execution. Looking forward to digging into this!
It would be a fun coding agent benchmark to have them translate such a program between the different languages and see whether they preserve the respective semantics.
Some of these design decisions seem indefensible to me. For example, what the authors call "Suspension":
-> Static: Await points guaranteed to suspend -- JavaScript
-> Dynamic: No guarantees on awaiting tasks -- C# · Swift · Tokio · Smol · Asyncio · Trio
What is "await" if not a synonym for "suspend"?!?
async/await is one product of a long line of thought that says "threads are too hard for programmers to get right". Threads (really, shared memory) have real usability issues for developers, but once you grok the semantics (which largely map to the physical execution model in a CPU) that knowledge is transferrable across virtually all languages and runtimes.
There are scenarios where something might need to await and might not. Why take the hit if you are able to do something synchronously? Edit: this is especially important given the “viral” nature of colored functions.
It does make it hard to reason about, but this kind of problem is all over the place - e.g. very similar-looking code can have very different semantics depending on your framework if you’re using jsx or a particular decorator means one thing in one project and something else in another. That’s just part of the game at this point.
it's a question of whether the runtime is guaranteed to suspend at an await point or if it may choose not to
> async/await is one product of a long line of thought that says "threads are too hard for programmers to get right".
what? no! concurrency vs parallelism etc etc
Also a great teaching tool, if someone knows one async system, to be able to show them the differences on each axis from their prior one to a new one they’re learning.
I think that's definitely right. Knowing the semantics of the language you mainly use is important.