For example, I have a setInterval that will get every 1 second checking if the company chat is with an online attendant. If an attendant comes online, I give a clearInterval and stop the function, but if no attendant goes online, it keeps running.

Can this, after a while, slow the site down?

EDIT

The response of the DVD is not very clear, I just want to know exactly, can it be slow or not? La is saying that it is recommended not to use it, only that I need to use it. I just wanted to be sure.

Thank you!