Why Use an Empty `select{}` Statement Instead of an Empty `for{}` Loop in Go?

Empty Select Statement in Go

In the provided code from net/http/httptest, an empty select{} statement is utilized. This statement plays a significant role in Go programming by blocking execution indefinitely, resembling the behavior of an empty for{} loop.

However, the empty select statement has a distinct advantage over its loop counterpart: it yields CPU resources on most (if not all) supported architectures. This means that while an empty for-loop would continue to execute at 100% CPU usage, the empty select will not, allowing the system to utilize available CPU resources more efficiently.

This unique characteristic makes the empty select statement a valuable tool in situations where a blocking behavior is required without compromising system performance. By yielding CPU resources, it ensures that other processes can continue to run smoothly.

The above is the detailed content of Why Use an Empty `select{}` Statement Instead of an Empty `for{}` Loop in Go?. For more information, please follow other related articles on the PHP Chinese website!