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List:       kdelibs-bugs
Subject:    [kdelibs] [Bug 240009] file selection dialog is very slow, because loading non-cached icons is very 
From:       Nicolas Frattaroli <kdebugs () fratti ! ch>
Date:       2015-09-18 12:26:15
Message-ID: bug-240009-90985-Ilo9zbg1Aq () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=240009

Nicolas Frattaroli <kdebugs@fratti.ch> changed:

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--- Comment #13 from Nicolas Frattaroli <kdebugs@fratti.ch> ---
My own bug report https://bugs.kde.org/show_bug.cgi?id=346403 might be a
duplicate of this one.

If it really is caused by the same code, then there is some interesting trivia
I can add to this bug report.

First, the bug only occurs if the initial directory of the file dialogue is the
one containing a lot of files. Specifying a different initial directory and
then navigating to the big directory works fine.

Second, the bug does not occur with dolphin. Compare:

dolphin really/big/directory/

with

kdialog --getopenfilename really/big/directory/

This holds both true for dolphin 15.08.0 and dolphin 14.12.3 (Development
Platform 4.14.11). I currently have no Qt5/KF5 kdialog around, so the version
being used for the test was kdialog 1.0 (Development Platform 4.14.11).

Again, I'm not sure if this is the original bug or a different one. The
symptoms sound familiar, and it's a common component, but it has been more than
five years since the initial report in which Qt, KDE and computers changed, so
the symptoms might have as well. (I remember the performance issue was more
severe on my netbook, where it would render the file selection unavailable for
up to two minutes in a folder with >800 files, but on my new SSD i7 ultrabook
it's about 20 seconds with ~1350 files.)

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