Very high memory usage - since 21st February patch

Ever since 21st February patch Overwatch has been unplayable for me. My memory usage is always above 90% when the game is open.

I tried opening Overwatch today and my memory usage reached 99% in main menu. Playing the actual game is like watching a slideshow.

I’ve found two similar posts regarding the same issue but there seems to be no answer. I was hoping that the problem would be solved in the following patches but it didn’t happen.

Post 1 with the same issue

Post 2 with the same issue