Since I updated to High Sierra, the Activity Monitor is showing Dragthing consuming 5% or 6% CPU, even when the machine is idle. This has little impact on system performance, but I’m sure it didn’t happen before.
I'm seeing the same thing after I upgraded to 10.13.2 last weekend. About 10% CPU load on a 2011 iMac i7. DragThing is usually at or near the top in the Activity Monitor CPU tab. I would request a fix, if nothing else due to all the wasted energy.