Our setup is multiple solutions for each service, and most inherit from "Core" parts. This type def file is about 1000 lines (can't count the number of declarations in there).

What seems to happen consistently: I can delete a label in a type record, no lag. As soon as I finish adding a label (haven't added its type yet), all matter of slow hell breaks loose and there is a 5 second delay before anything shows up. This happens regardless of whether or not the type is used in a low (<20) or high (>100) number of places. The delay is the same in all records.