When I enter a multi-part rar via double-clicking on part01.rar, and then copy ~6000 files out of it into a new folder on the same hard disc, the copying starts at 50 MB/s for the first few hundred files, then slows down to 500 kb/s after 4000 files.
It should go at the same speed regardless how many files have been done. WinRAR keeps up the speed.
I have had so many issues using double-click to open archive files and copying from them using DOPUS copy button, I have made a habit to revert to WINRAR or other standalone programs like 7-zip to do fast extraction of thousands of files.
I just gave latest DOPUS a try, and to my disappointment, these issues remain problematic it seems, after all these years.
I don't understand why "copying from archives" is never the same speed as "extracting archives".
Maybe there's a memory leak or some such in Directory Opus copy from archive function, IDK.
I checked and Directory Opus is only usin 17% CPU right now while extracting. I would expect it to use more to speed it up. Memory usage seems ok at 83 MB.