It looks like you’re looking at the performance in windows. Windows only has a vague idea what’s going on. If you really want, there are tools in the engine for looking at performance issues.
In the meantime, a very good guide that something may be wrong, is just to look at how many fps you’re getting. Start by looking what frame rate you’re getting in the demo level, and work from there.
You can use the console command ‘stat fps’, or there is a project option to always show the fps on the status bar at the top of the editor.