[digikam] [Bug 375035] Out of memory during face tagging

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=375035

--- Comment #12 from lesf at gmx.de ---
Issue still exists for 5.6.0 pre-release

Setup:
- 62800 pictures, JPG only
- stripped metadata, re-compressed with ImageMagick to save disc space and
exclude JPG issues (mogrify -strip -quality 50)

Start digikam:
  cd /var/tmp/dkdebug
  ./digikam-5.6.0-01-x86-64.appimage --config
/var/tmp/dkdebug/digikam-5.6.0.config

Vanilla digikam setup

Started face detection with default settings
2 x crashes (if the "Unknown" tag is selected while the detection is running)
~ 28900 faces (+ other) detected
Created 3 persons
Assigned ~10'000 faces to Person A, ~10'000 faces to Person B, ~5'000 faces to
Person C by selecting the thumbnails and assigning a name

Now, if a picture is opened and there are unassigned face tags in it, digikam
crashes with out-of-memory if I set a name to an unassigned face

digikam4.db: 28M
recognition.db: 213M
thumbnails-digikam.db: 1,7G

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