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The Async Invasion

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Avatar for Stephen Cleary Stephen Cleary
June 23, 2018
Programming
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170

The Async Invasion

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

Avatar for Stephen Cleary

Stephen Cleary

June 23, 2018
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Transcript

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  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

  11. StephenCleary.com

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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

  16. StephenCleary.com

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  21. StephenCleary.com Multithreaded Reactive (Event-Driven) Asynchronous Parallel Concurrent

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  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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  28. StephenCleary.com

  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

  46. ⚫ ⚫ ⚫ ⚫ ⚫

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  54. Image from Etsy user Rosewine; used with permission