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Export photos is very slow in Lightroom Classic

Community Beginner ,
Jul 02, 2025 Jul 02, 2025

Hello,
I am using lightroom classic for a while and I have issue with GPU. My GPU was Asus Radeon 6600X 8GB. 
I always had to keep the GPU off in Lightroom otherwise it was going crazy like crash or work very slowly. 
CPU was doing the job until the latest update for Lightroom which change the Denoise completely. (Ver14.4) 
After the update each photo took around 12 minutes to denoise, so I had to buy another GPU which is Asus Prime Geforce 5070 12GB 
After upgrade the GPU, denoising is very quick like 3sec for each photo but Exporting photos is very slow. 
I tried all the GPU troubleshooting like delete the config file , reinstall Lightroom Classic completely, update windows and drivers,... but it didn't help. 
When I turn off the GPU export is using CPU and it's a bit faster but still slow. 
Also when I check the performance during the export it  shows 2-3% GPU usage and 30-40% CPU 
For example export 10 JPG each 20-30MB will take around 1.5 minutes. 
Appriciate if someone can help me ti fix this. 
I have attached the screenshot of preferences window. 

My system Info is : 

Lightroom Classic version: 14.4 [ 202506051112-5918896a ]
License: Creative Cloud
Language setting: en
Operating system: Windows 11 - Business Edition
Version: 11.0.26100
Application architecture: x64
System architecture: x64
Logical processor count: 16
Processor speed: 4.4GHz
SqLite Version: 3.36.0
CPU Utilisation: 0.0%
Power Source: Plugged In
Built-in memory: 64735.8 MB
Dedicated GPU memory used by Lightroom: 2163.9MB / 11855.0MB (18%)
Real memory available to Lightroom: 64735.8 MB
Real memory used by Lightroom: 5035.4 MB (7.7%)
Virtual memory used by Lightroom: 7778.5 MB
GDI objects count: 760
USER objects count: 2416
Process handles count: 3247
Memory cache size: 0.0MB
Internal Camera Raw version: 17.4 [ 2272 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 91MB / 32367MB (0%)
Camera Raw real memory: 101MB / 64735MB (0%)
 
Cache1: 
NT- RAM:0.0MB, VRAM:0.0MB, Combined:0.0MB
 
Cache2: 
m:0.0MB, n:0.0MB
 
U-main: 86.0MB
 
System DPI setting: 96 DPI
Desktop composition enabled: Yes
Standard Preview Size: 3456 pixels
Displays: 1) 3440x1440, 2) 1920x1080
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: No
 
Graphics Processor Info: 
DirectX: NVIDIA GeForce RTX 5070 (32.0.15.7680)
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
 
Application folder: D:\Adobe\Adobe Lightroom Classic
Library Path: D:\Adobe\Adobe Lightroom Classic\Lightroom Catalog\Lightroom Catalog-new.lrcat
Settings Folder: C:\Users\Viva\AppData\Roaming\Adobe\Lightroom
 
Installed Plugins: 
1) AdobeStock
2) Flickr
 
Config.lua flags: 
 
Adapter #1: Vendor : 10de
Device : 2f04
Subsystem : 89e71043
Revision : a1
Video Memory : 11855
Adapter #2: Vendor : 1414
Device : 8c
Subsystem : 0
Revision : 0
Video Memory : 0
AudioDeviceIOBlockSize: 1024
AudioDeviceName: System Default - PHL 346P1C (NVIDIA High Definition Audio)
AudioDeviceNumberOfChannels: 2
AudioDeviceSampleRate: 48000
Build: LR5x26
Direct2DEnabled: false

 

--------------------------------------------------

Thread subject changed to Lightroom Classsic rather than Lightroom CC

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Community Beginner ,
Jul 02, 2025 Jul 02, 2025

Also, I should add that I have changed the GPU to custom in preferences tab in lightroom and selected use GPU for export but still the same issue. 

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Adobe Employee ,
Jul 03, 2025 Jul 03, 2025

Hey, @Max Mirzae. Welcome to the Lightroom Classic Community. I'll help you figure this out.

 

Where are the original images stored, on the internal or external drive? What specific edits are applied to these images? 

 

Try exporting a larger chunk of images to a location on the internal drive and monitor the read-write operation in the Task Manager to verify if the storage locations cap the bandwidth. 

 

Let me know how it goes. Thanks!

Sameer K

(Type '@' and type my name to mention me when you reply)

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Community Beginner ,
Jul 03, 2025 Jul 03, 2025

Hi Sameer, 

Thanks for your reply.

They stored on the internal hard drive and same drive as lightroom.

The drive is high speed 4TB NVMe SSD.

There is no specific edit on photos just some exposure settings. 

The drive BW is much higher than the export job needs. 

Thanks, Max

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Community Beginner ,
Jul 04, 2025 Jul 04, 2025

Hi @Sameer K  did you my respond below?

Thanks for your reply.

They stored on the internal hard drive and same drive as lightroom.

The drive is high speed 4TB NVMe SSD.

There is no specific edit on photos just some exposure settings. 

The drive BW is much higher than the export job needs. 

Thanks, Max

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Community Beginner ,
Jul 10, 2025 Jul 10, 2025

Hi @Sameer K any update on this request? 

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Adobe Employee ,
Jul 11, 2025 Jul 11, 2025
LATEST

Hi @Max Mirzae, Thanks for your patience! Your system seems capable, so let's try a few things to troubleshoot this issue.

- In Preferences > Performance, set GPU to Custom and enable all options (Display, Image Processing, Export).

- Increase Camera Raw Cache to 10–20 GB.

- Try exporting to a different drive or creating a new export preset.

In the meantime, we will continue to investigate this issue and try to replicate it. I hope this helps! ^CH

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