Terminals are more active?

 

I wonder if anyone else has noticed this. Before the latest release the terminals that I run on my vps, would require little of the CPU. They would take up quite a lot of memory on start up but after a couple of hours they would release at least half of that memory. But since the latest update each terminal uses between 2% and 11% of the CPU constantly. It also takes a lot longer for the memory to be released.

It's not a problem by itself, but I'm just wondering if this is on purpose and why?

Reason: