(*** This bug was imported into bugs.kde.org ***)
Version: 2.0 (kfmclient) (using KDE 3.0.1 )
Installed from: SuSE RPMs
OS/Compiler notes: SuSE 8.0; absolutely latest KDE 3.0.1 packages
Directories that contain few thousand files get kfmclient almost hang (without previes or anything; just plain file listing). Approx. 3000 files seems to be some mystical limit after which kfmclient is pretty much useless. Example: try to delete 5000 files in a single directory. It starts by deleting files one by one which takes ages. After it has deleted them down to ~3000 it's a blaze.
Oh machine should not a problem it's 'fast enough'. Plus system configuration is fine as well (disk IO is as expected).
(Submitted via bugs.kde.org)
Seems to work now ( 3.1 head as of 23.10.2002 ).
Deleting a directory tree with tens of thousands of files still is slow, because konqueror
builds a list of all files that have to be deleted. Try downloading all packages of KDE
3.1 into the same container directory, extract them all, and delete the container
directory. Takes almost a full minute to complete, while "rm -f -R" does the trick in
about 3 seconds.
This problem may be related to bug 41305.
Forgot to mention: I use KDE 3.1.1 now.
Are you using the iconview or the listview? If the former, I suggeste trying the
Still an issue.
Created attachment 8262 [details]
konqui_test.sh - test case
Attached script creates 5000 files in a temp directory.
Select all in Konqueror and delete the files. Updating the iconview or the
listview takes way too much time.
The slowness is caused among others by kdirlister using O^2 algorithms in
See also bug 90473
Note that if the progress stops at 3900 files for you with the attached test
script then you need to update kdirwatcher.cpp to CVS HEAD.
*** Bug 93156 has been marked as a duplicate of this bug. ***
QIconView also has some quadratic behavior when removing lots of icons, if my memory serves me right (and it's hard to fix, since the data structures are screwey; it may be something that we can only fix for KDE4, if Qt4's iconview is better, not sure if it is)
*** Bug 112877 has been marked as a duplicate of this bug. ***
*** Bug 150887 has been marked as a duplicate of this bug. ***
*** Bug 150885 has been marked as a duplicate of this bug. ***
I just committed a 25-times speedup for the case of deleting 1000 local files from the same directory, see Bug 150885 for details. This fix will be in KDE-4.2 (I might backport it for 4.1.2 if nobody detects regressions that my unit test didn't catch).
The GUI part is still slow though - this hits a performance issue in KDirModel. Working on this now.
Just a reminder -- in k3b (AFAIR) it helped to check if there is a difference in progress units -- if not, do not change anything in progress bar. But this my not be relevant in this case.
Fixed, finally, r862165.
Deleting 5000 files with konqueror-4.1 took 8 minutes (30 seconds stat'ing, 5 seconds deleting, and then 7'25" until the view refreshes).
Comment #12 was about speeding up the stat'ing part, but that was nothing compared to the long time updating the view (as Waldo had noted in kde3 too).
With model/view we can finally update the view in a better way: by chunks instead of item-after-item.
Deleting 5000 files with konqueror-trunk now takes only 15 seconds (2 seconds stat+deleting, 13 seconds until the view refreshes).
Don't worry about the progressbar, it has no time to even appear in the 2 seconds that the kio job takes :)
Absolute great speed-up! You are great :-)
Btw. stat+deleting I guess means counting + actual deleting. But what this
"the view refreshes" means (i.e. what view?).
The view is the dolphin or konqueror view, where you see those files, and which has to be updated whenever files are created or deleted. The graphical part of this all.
Does refreshing also take place _during_ deletion? If yes, maybe it could be "frozen"? I am asking because one can say 12 seconds is not big deal, but if comparing to actual I/O it is 6 times slower.
Refreshing happens after the actual deletion. Otherwise it would be chunked, and that means slower in this case (more signalling, more computing etc). I have no idea what you mean by frozen. The refreshing is about removing 5000 rows in one go in a Qt itemview, now that it's done in one operation, I can hardly make it faster. Yes it takes 6 times the time of the actual deletion (for 5000 items). GUIs obviously have a price compared to command-line tools, we have GUI stuff to handle in addition to the actual files :). But this is nitpicking. You don't delete 5000 files every day, and 15 seconds isn't that much for so many files.
*** Bug 170062 has been marked as a duplicate of this bug. ***