Doubtful. I have glances running on a server at home updating on the default 1s timer, it uses 5% CPU. I should probably change that to a longer update interval, but that server doesn't do much processing so it's not a big problem.
You can also launch glances.py directly so if it is going to show up on the process list it will be as 'glances.py' and not just 'python'.
You can also launch glances.py directly so if it is going to show up on the process list it will be as 'glances.py' and not just 'python'.