multithreading – Does too many threading.Timer() slow down the program while waiting in python?

if we call threading.Timer() in large numbers, will there be a problem? I mean the problem is does it involve the CPU? I mean just staying in the waiting state!

I did a series of researches, half of them said yes, and half of them said no !!

Exactly how? Do we make several timers, such as 100, fills the CPU or RAM and slows down the program?

Or not ? Does it have any effect ?!