Hello,
first, when comparing many many pictures the cache is more slowing down than it helps.
=> I suggest like the setting for very large collections disable the cache also for picture comparison
=> from time to time I press the clear cache button durin operation. That works in 1/3 cases, but the rest causes no response, althoug after the restart I see that the cache has been deleted.
Would hope you are able to fix/improve this. Please let me know if you need more information.
Best,
Martin