https://bugs.kde.org/show_bug.cgi?id=178678

--- Comment #76 from Germano Massullo <germano.massu...@gmail.com> ---
(In reply to Harald Sitter from comment #74)
> Does the server have a HDD or an SSD?
> While dolphin hangs what are the top CPU consumers in ksysguard?
> Also, while it hangs do you see network activity in ksysguard?

Thanks to people of #zfsonlinux IRC channel I got a way to reliable reproduce
the problem. On server
# zpool export tank
# zpool import tank
clears the entire ZFS ARC cache. Disks are HDD in RAID-Z configuration.
After each time I remount the SSHFS mount on the client.

I have runned tests several times on both GNOME Nautilus and KDE Dolphin,
running zpool export / import and what I found out is:
both Nautilus and Dolphin need much time to populate the "Size" column, and
both have network usage during this activity, but:
- Nautilus does not hang and the user can browse folder without being stuck
- Dolphin starts to lag and the user interface becomes stuck.

During this period of time, client and server are communicating and the network
activity is in the order of ~tens of kB/s.

So I really think it is a matter of how Dolphin threads are handled

(In reply to Harald Sitter from comment #75)
> ... and Does it make a difference if you disable the information panel on
> the right, or disable the Preview in there?

I never used preview and information panel on the right.

Concerning Krusader, in my opinion it is way smoother than Dolphin because it
does not calculate size of subfolders because you can only see <DIR> entry on
Size column. The size is calculated only for files in the current path, not for
subfolders

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