I was worried by high memory use so I decided to wipe clean my laptop:
- I made a bootable USB
- Disk Utility to erase evething
- Fresh install of latest OS
The problem is still there... I launched Safari to install Chrome and memory usage is already 2.8GB, now with all the Google Chrome Helper
it's even higher.
I have disable all but one Chrome extension and added "click to play" on media files and yet high memory usage persist. Or maybe this is normal and I should expect it?