Extremely slow LR Classic since upgrading to 15.0 (and now 15.0.1).

[sunshinegrrl]

I have been struggling wiht LR Classic since upgrading to the latest versions (15.0 and 15.0.1). I have follwoed all of the recommended fixed, including turning off automatic changes XMP, adjusting settings in NVIDIA to "prefer maximum performance", increasing cache size to 30, etc. I never had these issues before the upgrade, and nothing has changed with my computer. I have Windows 11 Pro, 64 GB, Dell CPS 8940. 

At this point, LR Classic is nearly unusable. As an MFA student trying to get my work done, this is a huge problem!

[sunshinegrrl]

I just posted my system info to this post:https://community.adobe.com/t5/lightroom-classic-discussions/updated-to-lr-classic-v15-0-and-program...

[Per Berntsen · Accepted solution]

From your system info:

Adapter #2: Vendor : 8086
Device : 4c8a
Subsystem : 9c51028
Revision : 4
Video Memory : 80

This is an integrated GPU – Intel UHD Graphics 750.

LrC doesn't like multiple GPUs, so try disabling it by going to Control panel > Device manager > Display adapters.

Richt click the Intel UHD Graphics 750 and choose Disable.

For the record, I find version 15.0.1 to be faster and more responsive than version 14.

In fact, I can't remember any version running so smoothly, and I've been using LrC since version 2 in 2008.

[sunshinegrrl]

Thank you so much, Per! That made a huge difference. I must have accidentally installed it when I got a prompt from Intel. I really appreciate it!

[MikeBarth]

I am happy for you Per,  I only wish I could say the same 😞

Could you please share your system info,  I'd like to make a comparison with mine if that's ok ?

Mike

[Per Berntsen]

Here's the system info for my studio computer (one month old), which has an Intel(R) Core(TM) Ultra 7 265K processor.

My home computer (one year old) has an i9 processor, 64 GB RAM and an RTX 3060 with 12 GB RAM.

The LrC catalog is on a fast M2 disk on both computers, and LrC performance is about the same on both.

 Note that these are desktop computers – not laptops.

Lightroom Classic version: 15.0.1 [ 202511041508-dddee541 ]

License: Creative Cloud

Language setting: en

Operating system: Windows 11 - Business Edition

Version: 11.0.26200

Application architecture: x64

System architecture: x64

Logical processor count: 20

Processor speed: 3,8GHz

SqLite Version: 3.36.0

Adobe GSDK Version: 1.4.0.171

CPU Utilisation: 0,0%

Power Source: Plugged In

Built-in memory: 64865,3 MB

Dedicated GPU memory used by Lightroom: 543,3MB / 16050,0MB (3%)

Real memory available to Lightroom: 64865,3 MB

Real memory used by Lightroom: 1164,6 MB (1,7%)

Virtual memory used by Lightroom: 2068,6 MB

GDI objects count: 816

USER objects count: 2769

Process handles count: 2913

Memory cache size: 84,2MB

Internal Camera Raw version: 18.0 [ 2389 ]

Maximum thread count used by Camera Raw: 5

Camera Raw SIMD optimization: SSE2,AVX,AVX2

Camera Raw virtual memory: 107MB / 32432MB (0%)

Camera Raw real memory: 114MB / 64865MB (0%)

Cache1: 

Final1- RAM:61,0MB, VRAM:221,0MB, Såheim stasjon 1.tif

NT- RAM:61,0MB, VRAM:221,0MB, Combined:282,0MB

Cache2: 

m:84,2MB, n:58,2MB

U-main: 123,0MB

System DPI setting: 96 DPI

Desktop composition enabled: Yes

Standard Preview Size: 1440 pixels

Displays: 1) 1920x1200, 2) 1920x1200

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 5060 Ti (32.0.15.9144)

Init State: GPU for Export supported by default

User Preference: Auto

Enable HDR in Library: OFF

GPU for Preview Generation: On (S5_15)

Application folder: C:\Program Files\Adobe\Adobe Lightroom Classic

Library Path: D:\Dropbox\Lightroom\PB-v15.lrcat

Settings Folder: C:\Users\xxx\AppData\Roaming\Adobe\Lightroom

Installed Plugins: 

1) Any Shortcut

2) Helicon Focus Export

3) LensTagger Exif Tool

4) Topaz Photo AI

Config.lua flags: 

Adapter #1: Vendor : 10de

Device : 2d04

Subsystem : 812b1462

Revision : a1

Video Memory : 16050

Adapter #2: Vendor : 1414

Device : 8c

Subsystem : 0

Revision : 0

Video Memory : 0

[mattwatt]

Hi, do you know how this would correspond to a Mac? Thank you!

[Per Berntsen]

I don't use Mac computers, so I can't really give you any advice.

But I found this post by @johnrellis on the Lightroom Queen forum, that might be helpful.

https://www.lightroomqueen.com/community/threads/magic-spells-for-sluggish-lr-15.54013/

[MikeBarth]

Many of us have reported serious performance issues with 15,  but I have not seen anything official come back from Adobe.

I went back to 14 and all is good.

[janetr69625301]

I tried Per's suggestion.  It worked seamlessly for my first pic.  With the second photo LRC froze AGAIN!  Please tell me the best way to roll back to 14.  Thanks.