Bug 503060

Summary: Cached thumbnails become uncached
Product: [Applications] digikam Reporter: HubMiner <cal030>
Component: Faces-EngineAssignee: Digikam Developers <digikam-bugs-null>
Status: REPORTED ---    
Severity: normal CC: caulier.gilles
Priority: NOR    
Version First Reported In: 8.7.0   
Target Milestone: ---   
Platform: Microsoft Windows   
OS: Microsoft Windows   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description HubMiner 2025-04-20 13:38:58 UTC
In People views, cached thumbnails quickly become uncached, possibly after any face assignments or changing hierarchy of that tag.

'Maintenance - Rebuild Thumbnails' works for a long time but does not address this.
Comment 1 caulier.gilles 2025-04-20 13:41:14 UTC
The thumbnail cache in memory if limited of course...
Comment 2 HubMiner 2025-04-22 03:45:53 UTC
I understood the thumbails are coming from their own database - since each thumbnail is taking a few seconds to regenerate, it looks like DK forgot those faces generated.  So I likely used wrong terms in the description - the thumbnails are not just uncached, they are missing and have to be regenarated.
Comment 3 HubMiner 2025-07-15 03:17:51 UTC
The issue exists in 8.7
Comment 4 HubMiner 2025-11-16 13:16:30 UTC
Overall V8.8 GUI is much improved, thank you!!!

But the process of verifying face assignments is very slow - after assigning many photos:
* Must load all faces to review before re-training.
* Only way I found: spam PAGE-UP via autoclicker.
* autoclicker automated 15–120s delay per page: hours total before I can start reviewing.

Fix Needed
Add "Load All Faces" button with progress bar.
This will be essential for trust in face assignments.