This is a real-time video of a group of 870 photos, the removal of 638 duplicates and the renaming and organization of 232 photos ( MacBook Pro Core i7 at 2,2 GHz)
You can jump from 10 min 15 sec to 21 min 10 sec to speed up the video.
A such operation is usually made only once. If you have tens of thousands of photos, you can launch this operation overnight ( in such case, think setting the cursor of "Energy saver" to "Never") .
You can slightly accelerate the app by launching a simple AppleScript called "Script to accelerate the runtime" placed in the folder of the app.