


Fire and Forget vs. Awaiting in Async/Await: When Should You Wait for Async Tasks to Complete?
Async/Await: Fire and Forget vs. Waiting for Completion
Understanding the interaction between a caller function and a called asynchronous function is crucial for efficient and correct code. Let's examine different approaches:
-
Scenario 1: Fire and Forget (Simple): The called function (Callee) is initiated but its completion is disregarded by the caller (Caller). The Caller proceeds immediately.
-
Scenario 2: Waiting for Completion: The Caller explicitly waits for the Callee to finish before continuing execution.
Now, let's introduce the complexity of thread pools:
-
Scenario 3: Fire and Forget on a ThreadPool Thread: The Callee runs on a thread pool thread, but the Caller ignores its completion status.
-
Scenario 4: Awaiting Completion on a ThreadPool Thread: The Caller patiently waits for the Callee to complete, even though it's running asynchronously on a thread pool thread.
Finally, let's consider the impact of async
keywords:
-
Scenario 5: Fire and Forget with Async on ThreadPool Thread: Similar to Scenario 3, but the Callee is declared
async
, yet its completion is still ignored. -
Scenario 6: Awaiting Completion with Async on ThreadPool Thread: The Caller utilizes
await
to ensure the Callee's completion before proceeding, even when the Callee runs on a thread pool thread. This is the most robust approach.
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