Thinktecture Webinar async/await in .NET

by Sebastian Gingter

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2 Deep-dive in async/await bei Backend-APIs ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ Twitter:

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3 ▪ ▪ ▪ (Theorie 😨) ▪ ▪ ▪ Deep-dive in async/await bei Backend-APIs

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12 Deep-dive in async/await bei Backend-APIs • • • • • • •

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13 Deep-dive in async/await bei Backend-APIs

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14 Deep-dive in async/await bei Backend-APIs Task Task-Liste Threadpool T1 Threadpool T2 Kern 1 Kern 3 Kern 2 Kern 4 Threadpool T3 Threadpool T4 Threadpool Management Jeder Pool-Thread arbeitet Tasks in einer Endlosschleife ab Completed Tasks

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15 • • • • • 🤯 Deep-dive in async/await bei Backend-APIs

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16 Deep-dive in async/await bei Backend-APIs

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17 ▪ ▪ ▪ ▪ ▪ ▪ ⏳ ▪ ▪ ▪ Deep-dive in async/await bei Backend-APIs ReadFile API: https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-readfile

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18 ▪ ▪ ▪ ▪ ▪ ▪ ⏳ ▪ Deep-dive in async/await bei Backend-APIs ReadFile API: https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-readfile

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19 Deep-dive in async/await bei Backend-APIs

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20 • • async Task<> MyMethodAsync() • • • await OtherMethodAsync() • • await • • • • Deep-dive in async/await bei Backend-APIs

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21 Deep-dive in async/await bei Backend-APIs

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22 Deep-dive in async/await bei Backend-APIs

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23 • • task.GetAwaiter().GetResult() → ❌ • Thread.Sleep() → ❌ • await Task.Delay() → ✔ • Thread.SpinWait() • → ❌ • → ✔ Deep-dive in async/await bei Backend-APIs

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24 • • var task1 = DoSomethingAsync(); var task2 = DoSomethingElseAsync(); await Task.WhenAll(task1, task2); • • • Task.Factory.StartNew(…, TaskCreationOptions.LongRunning); • • • Deep-dive in async/await bei Backend-APIs