[gwenview] [Bug 406431] Slow overview mode in directories with many files
https://bugs.kde.org/show_bug.cgi?id=406431 Patrick Silva changed: What|Removed |Added CC||bugsefor...@gmx.com -- You are receiving this mail because: You are watching all bug changes.
[gwenview] [Bug 406431] Slow overview mode in directories with many files
https://bugs.kde.org/show_bug.cgi?id=406431 Nate Graham changed: What|Removed |Added Ever confirmed|0 |1 Status|NEEDSINFO |CONFIRMED Resolution|WAITINGFORINFO |--- --- Comment #7 from Nate Graham --- Yeah, it's possible we can speed this up a bit. -- You are receiving this mail because: You are watching all bug changes.
[gwenview] [Bug 406431] Slow overview mode in directories with many files
https://bugs.kde.org/show_bug.cgi?id=406431 --- Comment #6 from c001-kd3-bug-squ33...@ubermail.me --- (In reply to Christoph Feck from comment #5) > It also needs to determine the file type, i.e. it opens every file and reads > the first few bytes. Why?!? I mean, sure, you probably want to filter the list and exclude any files that gwenview can't display anyway (completely reasonable for a good user experience) and determining the type by inspecting the content is a lot more reliable than by filename extension, but if that means I have to wait for the program until it read the beginning of 10k files, I would prefer a file name based filter (which works in >99% of the cases too and would be much faster). Another alternative would be to at least cache the result of the file inspection (so that one has to wait only the first time an image has to be inspected). But honestly, I am not sure it is a good idea to throw 'Caching' at such a simple problem, even if the chance of a broken cache is so unlikely. -- You are receiving this mail because: You are watching all bug changes.
[gwenview] [Bug 406431] Slow overview mode in directories with many files
https://bugs.kde.org/show_bug.cgi?id=406431 --- Comment #5 from Christoph Feck --- It also needs to determine the file type, i.e. it opens every file and reads the first few bytes. -- You are receiving this mail because: You are watching all bug changes.
[gwenview] [Bug 406431] Slow overview mode in directories with many files
https://bugs.kde.org/show_bug.cgi?id=406431
--- Comment #4 from c001-kd3-bug-squ33...@ubermail.me ---
Btw. if you want to reproduce the issue, but don't waste that much storage, I
found out that it works with hard-links too:
for i in {1..15000}; do ln original.jpg pic_$i.jpg; done
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[gwenview] [Bug 406431] Slow overview mode in directories with many files
https://bugs.kde.org/show_bug.cgi?id=406431 --- Comment #3 from c001-kd3-bug-squ33...@ubermail.me --- So I copied a directory with ~11000 photos on a local SSD and indeed there is a speedup compared to the NFS: Local: SSD + ext4: ~10-15 seconds NFS: HDD + ext4: ~30-35 seconds But given the hardware differences (HDD vs. SSD + 32G RAM), I wonder why gwenview still takes that much time to get to the conclusion that it has to display ~11k files. Dolphin is still miles away when gwenview just finished loading the file list. And when I ask ls how long it takes to give me the file list of an uncached directory it is much faster too: # umount /mnt/nfs; sleep 3; mount /mnt/nfs; time ( ls -l /mnt/nfs/pictures/ | wc -l ) 11343 real0m0,575s user0m0,059s sys 0m0,094s So, if ls takes half a second to get the complete (uncached) list via NFS, why does gwenview require 15 seconds on a local SSD powered RAM cached version? Obviously, something fishy is going on here. -- You are receiving this mail because: You are watching all bug changes.
[gwenview] [Bug 406431] Slow overview mode in directories with many files
https://bugs.kde.org/show_bug.cgi?id=406431 --- Comment #2 from c001-kd3-bug-squ33...@ubermail.me --- It is normally mounted via NFS4 (fstab). Tomorrow I should be able to copy one of those directories to a local disk. -- You are receiving this mail because: You are watching all bug changes.
[gwenview] [Bug 406431] Slow overview mode in directories with many files
https://bugs.kde.org/show_bug.cgi?id=406431 Nate Graham changed: What|Removed |Added Resolution|--- |WAITINGFORINFO CC||n...@kde.org Status|REPORTED|NEEDSINFO --- Comment #1 from Nate Graham --- > I access my photo directories via NFS, but I doubt that this causes the issue > as dolphin has no problem with that. Any chance you can test that out by copying them to a local directory and seeing if the issue goes away or remains the same? Also, are you accessing the pictures via a mounted NFS share, or using an nfs://[whatever] path? -- You are receiving this mail because: You are watching all bug changes.
