Xcode 12.5 Storyboard Performance

Hi there, updated Xcode to 12.5. After that, the overall performance of Storyboard feels really slow. 

My machine is Macbook Pro 16, QuadCore i5, 16GB)

I must wait for a few tens of seconds for each operation on Storyboard. For example, changing text size, changing text color, adding constraint.

Is anybody else getting the same problems?

Xcode 12.5 Storyboard Performance
 
 
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