I have been deleting wall cladding objects from an IFC made in Archicad. These are brick veneer and weatherboard, modelled with very complex meshes. I noticed the more complex the mesh the longer BlenderBIM takes to delete them, 10 seconds plus on my Ryzen 5 for the worst.
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BTW, deleting the cladding shaved 20mB off the IFC, now 2mB
Deleted what I posted, my own stupidity was the problem. Not BlenderBIM.
Warning, that condition seems to escalate with age and sadly (contrary to widespread belief) it is not offset with an increase in wisdom
Happens to me everyday hahaha