[Digikam-devel] [digikam] [Bug 322789] New: Enabling "color managed view" in editor slows down tool startup

[Peter Albrecht]

https://bugs.kde.org/show_bug.cgi?id=322789

            Bug ID: 322789
           Summary: Enabling "color managed view" in editor slows down
                    tool startup
    Classification: Unclassified
           Product: digikam
           Version: 3.2.0
          Platform: Gentoo Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: NOR
         Component: Image Editor
          Assignee: digikam-devel at kde.org
          Reporter: px79 at crazymonkeys.de

With digiKam 3.2.0 I encountered the following "problem": Open an image with
the "Image Editor". Having "Color Managed View" enabled, the startup of tools
like "Brightness / Contrast / Gamma" takes a lot of time. The time from
clicking the menu item until having the tool ready to be used, ranges from 4
seconds to even 12 seconds.

Doing a parallel "strace -fp <digikam-pid>" gives me 86 times the line
  open("/usr/share/apps/libkdcraw/profiles/srgb-d65.icm", O_RDONLY|O_CLOEXEC) =
23

This does not seem to be intended and could explain the long delay for the tool
startup.

If I disable "Color Managed View" in the "Image Editor" with the small toggle
button in the lower right corner, the tool "Brightness / Contrast / Gamma"
starts up in less than 1 second.

Similar effect for tools "White Balance" or "Hue / Saturation / Lightness" but
with these the delay it at max by 6 seconds.

I'm using digiKam 3.2.0 with KDE 4.10.4 at the moment. This problem did not
occur with digiKam 3.1.0 and KDE 4.10.3.

Reproducible: Always

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