Performance and accuracy of placement is greatly improved when linking IFC files.
Linking IFC files into your models is now significantly faster than in previous releases of Revit. Additionally, you have increased control when linking an IFC model. In the linking dialog, use the drop-down list to select a positioning option. IFC links can be positioned at the same datum and orientation as allowed during export. The default position places the link's origin at the internal Revit origin.
For additional information, see: