Czkawka making my CPU earn its living by finding similar images in a folder with thousands of duplicates. Love this tool, it's a must for everyone in this sub. Thank you, /u/krutkrutrar!
Just tried this! It's either so efficient my CPU isn't working too hard or it focuses most of its work onto one CPU core. That said, I appreciate being able to identify the highest res version of a file, that helps a lot!