What are the best practices for using std::async in C++?

What are the best practices for using std::async in C++?

When using std::async, it's important to consider the launch policy. You can choose between std::launch::async and std::launch::deferred.

Can you explain the difference between those two launch policies?

Sure! std::launch::async runs the task on a new thread, while std::launch::deferred runs it only when you call get() on the future.

What are some common pitfalls to avoid when using std::async?

Common pitfalls include not handling exceptions properly and assuming that std::async will always run tasks concurrently.

How can I ensure that my tasks are executed in the order I want?

To ensure order, you can chain futures or use std::promise and std::future to control the execution flow.