[kio] [Bug 291835] KIO very slow when copying from network through smb

[C. Priisholm via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=291835

C. Priisholm <claus.priisholm at gmail.com> changed:

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                 CC|                            |claus.priisholm at gmail.com

--- Comment #39 from C. Priisholm <claus.priisholm at gmail.com> ---
I've been browsing the bugs and this seems to be related to what I am seeing,
but with a twist.

When copying to a mounted cifs share, I either get the expected performance
(around 100MB/s on a 1Gb network) or I get a much slower transferspeed (around
15-25 MB/s) when copying gigabyte sized files with Dolphin.

To recreate I have the source folder in one pane and the parent folder
(containing the target folder) in the other pane. 
It behaves well if I drag the file on top of the target folder and selects
copy/move, i.e. insert the file into the target folder. 
But if I open the target folder - i.e. shows it contents in the pane rather
than showing the parent folder - and then drag a file to the pane, then the
transfer speed drops dramatically.

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