Yes, our own venerable site is a CPU hog...probably due to shitty javascript created by outsourced Indian programmers....natch.
I use the the process manager of Glary Utilities to track the CPU consumption over time. It is so much superior to Windows Task Manager.
Any comments and suggestions greatly appreciated !
I usually use Edge on Win10 on an Intel dual core i5-7200U, and ET shows an average of 1-2% while idle, and a spike to 15% or so when clicking forums. This seems totally normal to me. This site is lightweight.