我想知道python是如何threading.Timer工作的。
更详细地说，当我运行几个时threading.Timer，它是否运行单独的线程来计算时间并运行处理程序？
或者一个线程一起管理和计数几个计时器？
I am asking because my application need to schedule many event, But
If threading.Timer runs separate each thread for counting a timer, and i run many timers, it may affect performance so much.
So i am worry that if i have to implement a scheduler running only one thread if it has big effect in performance.