Performance Evaluation reports when in-context relationships involving relatively large parts contribute a significant percentage to the assembly rebuild time.
When an assembly is rebuilt, the software re-evaluates all in-context relationships established at the top level of the assembly. First the location of the driving component is determined by evaluating its mates and sometimes rebuilding the driving component. Then the driven component is rebuilt. If the driven component is a complex part with many features, rebuilding it can take a significant amount of time.
- If you are making changes that require the driven component to be resolved, then the increased rebuild time is unavoidable.
- If you are working on components that are not related to the driven component, you can improve the rebuild performance of the assembly by suppressing the driven component.
To list the components:
Click Show these Parts 
in Performance Evaluation.
In the dialog box, you can:
- Select one or more components in the list to highlight in the graphics area.
- Click Isolate Components to display only the selected components in the graphics area. Click Exit Isolate (Isolate pop-up toolbar) to return to the list.
- Print the list, copy it to the clipboard, or save it to a file.