What are the differences between std::async and threads in C++?

What are the differences between std::async and threads in C++?

std::async is a higher-level abstraction for asynchronous tasks, while threads provide lower-level control over execution.

Can you explain how std::async manages threads behind the scenes?

Sure! std::async may use a thread pool or create a new thread depending on the launch policy, optimizing resource usage.

When should I use std::async instead of creating threads manually?

Use std::async for simpler code and automatic resource management, especially for tasks that can run independently.

Are there any performance differences between the two?

Yes, std::async can introduce overhead due to its abstraction, but it often leads to cleaner and more maintainable code.