[digikam] [Bug 381605] New: Importing large image collection slows down to unacceptable speed

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https://bugs.kde.org/show_bug.cgi?id=381605

            Bug ID: 381605
           Summary: Importing large image collection slows down to
                    unacceptable speed
           Product: digikam
           Version: 5.5.0
          Platform: Kubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Import
          Assignee: digikam-devel at kde.org
          Reporter: piotergmoter at hotmail.com
  Target Milestone: ---

There is something wrong with import - speed.

My setup is laptop + NAS. 

On laptop's local SSD drive I have digikam.db, NAS (Synology) is a datastore
for images.

When I copy images from laptop to NAS (using dolphin) the average speed is
20-50MB/s. The same set of images imported from MPT device (Samsung smart
phone, connected with USB) or local folder on SSD drive (using CTRL+ALT+I)
makes the process sloooow. When I monitor the LAN speed during import I can see
weird behavior. Net usage is generally very low, with some occasional peaks.
>From DK point of view I can see progress, but it is very very slow. The first
images are going well, but soon (3-4%) there is huge slowdown and it forces me
to interrupt the process.

The scale of import is about 350 images/video files (10GB of data).

My system is Kubuntu, Digikam package from Phillip5 ppa.

Regards
P.

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