Experience performance problems since recently

I have a slightly older machine, Macbook pro late 2016 and have recently started having
performance problems. For example, when I copy (only a few) frames into a new document, I immediately get the bar at the top that I have memory problems (the bar never came before). Is this a known problem, is there an update for it? Thanks!

Actually you can close this, found out that the problem is that there are just too many layers, never had this issue before so I wasn’t aware of this.