I have seen a lot of people complain about Teams performance. And Microsoft has announced they are pushing a new client. That is supposed to be significantly improved for performance. However, we have found that a simple change with in the client may help in some cases. If the users goes into settings and checks the box to disable GPU hardware Acceleration in some cases this may resolve the issue.

Your experience may vary depending on which version of client and what systems you are operating on. But it may be worth a try if you feel teams is causing you performance issues. We have found that sometimes general performance of your machine and other apps are affect even when you think teams is not in use. So if your machine is having performance issues it is worth giving this a shot.