Deleting photos in "slideshow" mode takes 15-20 seconds
When I look through a folder of jpg photos, clicking "Command delete" deletes the photo, but it brings up the spinning beachball and it is about 15 to 20 seconds before it will allow the buttons to advance again. For what is it worth, using Graphic Converter in it's slide show mode, the same thing happens. I have contacted the developer of Graphic Converter and he knows of no reason for this. (It used to be instantaneous as well.)
I am using the latest version of Mojave and have re-started in "recovery" mode and used "disk utility" and it reported no problems. Checkmate reports no problems. Tech Tool Pro 11 reports no problems.
I am baffled!
MacBook Pro 15", macOS 10.14