SketchUp Pro version 16.1.2418 problems on macOS 10.12.1

Sketchup is slowing to the point of being unusable after Sierra update. I thought I had solved the problem by switching out my Logitech mouse. I tried using an apple magic mouse and the problem persisted. It seems to somehow be related to the zoom. Sketchup does not crash but becomes very slow and slows down entire computer. Any ideas?

What model of Mac are you using? I’m not seeing any appreciable change on my mid-2012 MBP Retina.

Early 2011 MacBook Pro

If you’re really slow, and kill SketchUp with cmd-option-escape menu, you can get a spindump. post top of the results here