Thinking after writing a code with a very high CPU usage

1 If you write an infinite loop without any delay, the CPU usage will skyrocket.

2 Task.Delay() is an asynchronous delay, which cannot be delayed when written in synchronous code.

3 Thread.Sleep(0) does not really want the thread to be suspended for 0 milliseconds. The meaning is that the current thread calling Thread.Sleep(0) is indeed frozen this time, giving other threads a chance to execute first.Thread.Sleep(0) means that your thread temporarily gives up the cpu, that is, releases some unused time slices for use by other threads or processes, which is equivalent to an abdication action.

4 Writing a Thread.Sleep(0) in an infinite loop will not cause the CPU usage to soar.