Report LabVIEW 2017 Editing Issues in Development Environment (IDE) Posted February 1, 2019 3 hours ago, LogMAN said: Also the CPU consumption is about 20% while dragging, which is way to high in my opinion. How did that ever pass testing phase? Looks to me like they never tested with more complex VIs like this because it works fine for smaller (or empty) VIs. This may have already been mentioned, but have you tried changing the compiler complexity threshold? http://zone.ni.com/reference/en-XX/help/371361P-01/lvdialog/miscellaneous_options/#compiler Its possible its trying to compile while you drag or something, and maybe the drag selector interacts with the UI thread more or something.