I am not surprised that powerful utility for finding duplicate was my fault. Process priority settings that will absolutely enough for a good.
By analyzing your hard drive, Fast Duplicate File Finder lets you quickly find duplicate files. There is a per-folder option "Exclude from self-scan" which denotes that the items inside that "source" folder will not be compared with each other - they will be compared only with items from the other folders in the list. Process priority settings that will let the application scan in your computers IDLE time.
