The Async Invasion

Why so many languages are adopting async/await, and why that's a good thing.

Transcript

7. StephenCleary.com async Future // In the Real World, we would actually do something... await Future async await yield
8. StephenCleary.com async Future // In the Real World, we would actually do something... await Future await async Future Future Future await
9. StephenCleary.com async Future // In the Real World, we would actually do something... await Future await
10. StephenCleary.com async Future // In the Real World, we would actually do something... await Future
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15. StephenCleary.com Next: • C++ (n4680 Coroutines) – C++20? • Kotlin (experimental coroutines in 1.1) • Rust (nightly since 2017-08) Timeline
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21. StephenCleary.com Multithreaded Reactive (Event-Driven) Asynchronous Parallel Concurrent
23. StephenCleary.com User mode Kernel mode My code OS Device driver OVERLAPPED IRP ISR APC blog.stephencleary.com/2013/11/there-is-no-thread.html State: Created. State: In progress. State: Complete.
24. StephenCleary.com User mode Kernel mode My code OS Device driver Thread IRP ISR APC blog.stephencleary.com/2013/11/there-is-no-thread.html State: Created. State: In progress. State: Complete/Running. State: Blocked.
25. StephenCleary.com Asynchronous API (complex) Synchronous API (simple) Synchronous API (simple) Asynchronous API (complex)
26. StephenCleary.com Asynchronous API (complex) Synchronous API (simple) Synchronous API (simple) Asynchronous API (complex)
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29. StephenCleary.com Client Server Primary benefit: Responsiveness Primary benefit: Scalability Keep UI thread free Minimize threads used to serve requests Better UX 10x-100x scalability (same box) Required by many app stores Faster response to bursting traffic
30. StephenCleary.com Client (Desktop) Server (On-Premises)
31. StephenCleary.com Client (Mobile) Server (Cloud)
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37. StephenCleary.com Async/Await Futures / Continuations Callbacks Events Time
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45. Task<T> Promise
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54. Image from Etsy user Rosewine; used with permission