https://bugs.kde.org/show_bug.cgi?id=476627
Bug ID: 476627 Summary: Loading of large directories abnormally slow after update Classification: Applications Product: dolphin Version: 23.08.2 Platform: Other OS: Linux Status: REPORTED Severity: normal Priority: NOR Component: general Assignee: dolphin-bugs-n...@kde.org Reporter: sonichedgehog_hyperblas...@yahoo.com CC: kfm-de...@kde.org Target Milestone: --- Created attachment 162900 --> https://bugs.kde.org/attachment.cgi?id=162900&action=edit fstab SUMMARY Large directories are now taking a ridiculous amount of time to load in Dolphin. A folder with over 65.000 images would previously take roughly 15 seconds to finish loading, now it’s over 5 minutes. During this time I see 100% of one CPU core being used, however I can’t find a root or user process doing it and it’s not the Dolphin application itself… my hard drive keeps being read at a rate of roughly 3 MB/s. This only happens once per directory after boot, after a directory finishes showing up it will load at normal speed until you reboot... this indicates the problem may be related to caching. It’s definitely not a problem with my drive and was introduced by a recent update, other operations such as using the 'ls' command are just as fast only Dolphin appears to be affected. STEPS TO REPRODUCE You need a directory with a lot of files to see it clearly, at least 50.000 if possible: Open it and the issue should be quickly noticeable. A good test folder that's typically large for most users is ~/.cache/thumbnails/large where preview thumbnails are cached by the system, opening that should trigger it if you have a lot of previews. OBSERVED RESULT The directory takes minutes to load as Dolphin is barely responsive during the process. EXPECTED RESULT Over a month ago it would only take a few seconds, something clearly changed affecting directory loading speeds on Dolphin or some KDE component exclusively. SOFTWARE/OS VERSIONS Operating System: Manjaro Linux KDE Plasma Version: 5.27.9 KDE Frameworks Version: 5.111.0 Qt Version: 5.15.11 Kernel Version: 6.6.0-1-MANJARO (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor Memory: 31.3 GiB of RAM Graphics Processor: AMD Radeon RX 570 Series ADDITIONAL INFORMATION Attached /etc/fstab as it's been previously pointed out Dolphin had issues with certain parameters there. The affected partition is a SATA3 HDD, I'm also able to reproduce it on my SSD where loading a large directory with lots of images is abnormally slow as well... both are ext4. No drive errors, booted with "fsck.mode=force fsck.repair=yes" to make extra sure and the issue persists even afterward. Baloo is enabled but the affected directories are not indexed. Enabling or disabling previews in Dolphin doesn't make any difference. Extra discussion of the issue on the Manjaro Linux forum: https://forum.manjaro.org/t/dolphin-loading-of-large-directories-very-slow-after-update/149727 -- You are receiving this mail because: You are watching all bug changes.