Custom Property Tab and Performance Issue in Assembly

[zwei]

We recently notice a huge performance issue due to the custom property tab

When the custom property tab is active, selecting and unselecting the face cause a huge delay

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When the custom property tab is not active, selecting and unselecting the face has no issue/delay...

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The custom property template file is stored on user local drive (C:)


Anyone has faced similar issue before?

Edit: For some reason selecting a face with the custom property tab active is stressing out the processor/CPU

[AlexLachance]

Hrm I don't think I've ever encountered that panel before

[SPerman]

I don't have that problem on 2020 SP5, but I don't have most of the other options checked.

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[zwei]

After some checking...
it seem like one of the imported multi-body part has a very high graphic triangle count (253387) which stressed the system...

But i still dont really understand why turning off the custom property tab improve the performance