I recently switched from a 2014 mid MacBook Pro Retina with 2.7 GHz and 8 GB of RAM to a 3.1 GHz and 16 GB of RAM. I noticed something very strange which is that 1) when I am dong very basic tasks such as downloading something for the new MacBook Pro, it occupies 6 GB of memory used and 2) the CPU usage seems to be high compared to my MacBook Pro with 2.7 GHz when doing the same thing (i.e.: downloading same sized files and size).
Why is this the case? Most curiously, I'm wondering why the memory used for the new MacBook Pro is at 6 GB when simply downloading something.