Finder eating CPU

Finder is at about 100% of CPU usage right now.

This happens ONLY when I view folders in icon view and there's many different folders or app icons on the screen.

First screenshot is with normal CPU usage with the applications folder opne, notice the window isn't showing all the icons.

The second image is when the CPU is using 100%, nothing else changed.

What's strange is that when I log into my other account on the same computer it doesn't eat CPU time with the same apps open and finder window showing all icons.

This doesn't happen with list view, nor is it set to calculate folder size.

Can anyone help?