Thanks a lot for taking the time to have a look at my Lightroom Classic (LRC) delay problem !
When using LRC on my PC with LRC catalog on system drive, and original photos reachable via a network connected server (NAS), I have no problematic delays when using LRC, all functions respond subsecond.
The ten to 45s LRC delays occur when the NAS is continuously unreachable (such as NAS powered off), but the PC is connected to the internet. (Note: the Library module's "Folders" sidebar updates immediately when the NAS becomes continuously unreachable by the green light and NAS path/folder turning black)
The LRC delays occur in Library and Develop modules in a few situations: (Note: Windows Error Reporting shows no errors when any of the delays described below occur)
1. If LRC is running, and I switch to any other app outside of LRC, and then return to LRC, there is a 10 to 45s delay within LRC, and LRC shows "Not Responding" in the title bar. 2. LRC in Library mode: Occassionally when cycling through images in this mode at any speed. 3. LRC in Develop mode: Occassionally when cycling through images in this mode at any speed.
System as of day of this post on Oct 26, 2021:
PC Resource Utilization when described delays occur: CPU: even at < 3% Memory: even at < 30% Disk: even at 1 % Network:even at 1 % GPU: even at 1 %
PC hardware: CPU: AMD Ryzen 9 5950X 16 core, 3.4GHz GPU: NVidia GeForce RTX 3070, Total Memory: 24MB, Dedicated Video Memory: 8GB, Shared System Memory 16GB RAM: 32GB System drive: SSD, 1 TB, 75% free
Software: Windows 10 Home, fully updated, licensed LR Classic 10.4, fully updated, licensed, signed in Camera Raw 13.4, licensed Adobe Creative Cloud 188.8.131.528, fully updated, licensed, signed in
Software Configuration: LRC: Preferences/File Handling: Import DNG Creation: File Extension: DNG JPEG Preview: Medium Size Embed Fast Load Data: checked
Preferences/Performance: Camera Raw: Use Graphics Processor: Auto (Note: 10s to 45s delays occured when set to off too) (Note: "Your system automatically supports full acceleration" is displayed) Preferences/Camera Raw Cache Settings Location: system SSD Max Size: 20GB Preferences/Develop: Enable hover preview of presets in Loupe: checked Use Smart Previews instead of originals for image editing: checked (Note: delays occur this setting unchecked too) Preview Generation Settings: Generate Previews in parallel: checked Catalog Settings/General: Location: system SSD Backup/Back up catalog: Every time Lightroom exits Catalog Settings/File Handling: Preview Cache: Total Size: 2GB Standard Preview Size: Auto (2560px) Preview Quality:Medium Automatically Discard 1:1 Previews: After 30 Days Smart Previews: Total Size 1GB Import Sequence Numbers: Import Number: 1, Photos Imported: 0 Catalog Settings/Metadata: Offer suggestions from recently entered values: checked Include Develop settings in metadata inside JPEG, TIPP, PNG, PSD files (all other Catalog Settings/Metadata settings unchecked. Note: same delay problems occurred with Automatically write changes into XMP checked) Lightroom Plug-in Manager: All plugins disabled (Note: same delay problems occurred with all plugins enabled)