Other actions like Create Item or such should also take that amount, depending on whether the data store is busy or not. In my test yesterday it had a long delay at first, as soon as I opened DEVONthink To Go once, it responded immediately. So it seems that Core Data sometimes places a lock on the data store which especially hits the extensions, from Shortcuts to Clip to DEVONthink.
We are aware of this and we’ll surely investigate if we can find ways to make this work smoother.