Sketchup 2020 vs 2019 Performance


Firstly, the specification for my MacBook Pro;

MacBook Pro (Retina, 15 Inch, Mid 2015)
Processor: 2.2 Ghz Quad Core Intel i7
Memory: 16GB 1600 MHz DDR3
Graphics: Intel Iris Pro 1536MB
OS: Catalina 10.15.4

Here is the situation on my MacBook Pro;

Sketchup 2020

Creating a very simple Model of a very small Single Storey Extension. File size is around 5MB.

When I zoom out and orbit, it is really quick and smooth. If I zoom in so the model fills the entire window and then orbit, it becomes jumpy.

If I make the Sketchup Window smaller on the screen, it becomes smoother.

Also, I have found that if I open one model, work on it, then close and open another model, Sketchup seems to slow down. If I reboot my MacBook Pro, Sketchup works faster. It’s as if Sketchup is not giving ‘resources’ back when closing Models.

Sketchup 2019

I can open a Model of a Commercial Office, (file size about 70MB), which is larger than a football pitch, with Electrical overlays, HVAC overlays, multiple Textures, Furniture, Structural Steel, numerous Scenes, numerous Sections, etc etc etc, and it orbits really quickly, whether I’m zoomed in or not.

Also, when I close a Model and open another, the performance is not diminished.

Any ideas on this would be appreciated as I think Sketchup 2020 seems to have a flaw.

Kind regards