SUMMARY I noticed that sometimes extracting an archive via context menu of Dolphin takes a long time. Then I tried extract the same archives directly with Ark and surprisingly I noticed that the extraction of certain types of archives is much faster, sometimes taking about half the time. I did many tests extracting several types of archives containing a 1 GiB video file, and here are the biggest differences: Extraction via context menu of Dolphin: tar.zst 48s tar.Z 1m20s tar.lzma 3m17s tar.lz 3m52s tar.bz2 5m18s Extraction directly with Ark: tar.zst 26s tar.Z 45s tar.lzma 1m56s tar.lz 1m55s tar.bz2 3m04s STEPS TO REPRODUCE 1. extract any of the following archives types via context menu of Dolphin and then directly with Ark and pay attention to the time each extraction took: tar.zst, tar.Z, tar.lzma, tar.lz, tar.bz2 2. 3. OBSERVED RESULT inconsistent performances depending on the way used to extract the archive EXPECTED RESULT same performance regardless the way used to extract the archive SOFTWARE/OS VERSIONS SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.25.90 KDE Frameworks Version: 5.98.0 Qt Version: 5.15.6 Graphics Platform: Wayland
That's because before extracting an archive, ark needs to "load" it. That's why if you first open it in ark and then extract it, it's going to be faster. Not much we can do here, it's a design choice in ark.
*** Bug 458523 has been marked as a duplicate of this bug. ***
Thanks for clarifying, Elvis.