纤维有优先级吗？
纤程被定义为轻量级线程，线程具有优先级，因为它们是抢占式调度的。然而，既然纤维是合作的，它们也有优先级吗？
Fibers are defined as lightweight threads, and threads have priorities because they are preemptively scheduled. However, since fibers are cooperative do they too have priorities?
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不，它们本质上没有优先级，就像在协作多任务中一样，上下文切换目标始终由移交控制权的代码片段确定（例如调用 Fiber.yield()，或者在您的实现中可能会调用它） ）。
不过，这并不妨碍您实现调度程序来确定应用程序级别的下一次切换，然后应用程序可以再次根据优先级做出决定。
No, they intrinsically don't have priorities, as in cooperative multi-tasking, the context switch target is always determined by the piece of code handing off control (e.g. calling Fiber.yield(), or however it might be called in your implementation).
This doesn't keep you from implementing a scheduler to determine the next switching at the application level, though, which could then decide based on a priority again.