LRC 15 Slow?

[JBedfordPhoto]

Since updating to LrCC 15 yesterday (Windows 11), I find my workflow much slower. Both the library and develop modules are slower, photos taking a long time (a couple of seconds) to paste settings in the develop module (despite LRCC receiving the input to paste immediately, the effects take a few seconds to apply to the image - this is true across both my Phase One tiff/raw files and my Fujifilm X series raw files).

Anybody else experiencing some slowdowns (as usual with a new LRCC release, unfortunately). 

[johnrellis]

"Disabling Intel GPU is not an option...I tried only for curiosity and I immediately lost the multi-screen option"

But did the performance problem go away?  If it did, that's a very strong indicator that when Windows automatically assigns the Intel GPU to LR, you're getting the performance problems, and you need to Axel's other suggestion.

[sandroriz]

Ok, I updated the nvidia drivers as @AxelMatt and you kindly suggested and I confirm the performance have improved, but NOT at the same level of 14.5

I also set in Windows Settings to use GPU instead integrated intel....  BTW if I put contrasting information (eg. intel in windows and nvidia in nvidia control panel) WHO WINS ?

The more noticeable "lag" is in Developer module: when I click the "next photo" (arrow right); the panels on the right remain disabled for 2 or more seconds and then become available.

Note that it happens even if the photo have 1:1 preview rendered

ANYWAY THANKS FOR YOU HELP to both!!

[Viking_Rabbit]

All these tweaks we're being given are cargo cult nonsense. If LR was working fine with v 14.51 and then started crapping out immediately after the upgrade to 15, isn't the simplest explanation that there's something wrong with v 15?

[johnrellis]

@Viking_Rabbit: "If LR was working fine with v 14.51 and then started crapping out immediately after the upgrade to 15, isn't the simplest explanation that there's something wrong with v 15?"

Often that's the case, and it may be what's happening here. But I've helped enough people over the years where it isn't the case.

There are many reports here of a new release of LR exhibiting problems that weren't present with the previous release, and updating the graphics driver for the GPU fixes the issue. Adobe is constantly improving how LR and Camera Raw use the GPU, and it's not uncommon for the new code to trip over existing bugs in particular graphics drivers that the old release didn't. (The drivers have many, many bugs, which is why GPU manufacturers release new versions a couple times a month.)

As another example, I've helped several people experiencing slowth in LR 15 caused by them placing their catalogs in folders synced by Onedrive, which has long been a known cause of all sorts of problems with LR (an issue caused by Onedrive, not LR).  Why those people didn't experience issues with LR 14, I don't know, but apparently they didn't.

[Viking_Rabbit]

Sure, the graphics drivers are one example of a problem resulting from an upgrade that the user can fix (and the first thing most of us probably checked), but also would it be that hard to test with one or two previous driver iterations and issue an alert for people to update their drivers? 
I guess my issue is that in all the threads I've found, all the usual tweaking of the settings gets suggested (e.g. turn off XMP writing, move your photos to an SSD, reinstall LR (are you kidding?), etc.). One imagines that if the currently tweaked settings were working under 14.5, they should work under 15, right? I shouldn't have to re-tune LR after every upgrade? If I do, that is a problem with the software! Even if the problem were caused by the auto-culling feature being turned on (it wasn't for me): maybe that setting shouldn't be on by default.

I use LR on three different PCs, all pretty tricked out for photo editing, one with an AMD card, two with Nvidia, and the LR 15 problem hit ALL of them.

Installing an upgrade shouldn't break my workflow!

[Rlrood]

Hello John,

Understand the points in your note above, and do not disagree in any regard. My situatioon is that I've done everything mentioned in your note and pretty much everything suggested by all of the posts concerning the 
V15 situation. My question to you now is: what should I do next? I haven't reinstalled v15 - should I do that? Please help.

Larry Rood

[James278055166zdm]

The update to Lightroom 15 was released too soon.  When I installed it the first time it caused nothing but headaches.  Reinstallation of the software and creation of a new catalog finally brought me online; however,  v. 15 is exceedingly slow.  Opening the program can take up to 60-70 seconds...and, the development mode can take 13 sec to open an image.  None of these problems existed with v.14.5  I use Windows 11 Pro, i7 processor, 32 GB installed memory etc.  I have tried numerous suggestions and non of them have helped.  

[johnrellis]

@James278055166zdm, please do the LR menu command Help > System Info and copy/paste the entire contents here so we can see exactly which versions of hardware and software LR thinks you're running and important LR options that are set.

[MikeBarth]

I have a similar issue,  15.0.1 takes 3 minutes to open an empty Catalog !  QA on these releases must be pretty inadequate.  Serves me right as I had previously stuck to Current Version n - 1 for my production environment.  

[AxelMatt]

... QA on these releases must be pretty inadequate. 

...

By @MikeBarth

Why you think this? 

I don't see this slowness on my side. So it seems a local issue with the configuration/compatibility on the loacal machine.

[James278055166zdm]

Biggest problems are length of time to open Ligroom 15 (60-75 sec.),  time switching from Library to Develope module (15-20 sec),   switching from image to image in either module mode.  These problems were not there prior to updating.

Lightroom Classic version: 15.0.1 [ 202511041508-dddee541 ]

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: 12

Processor speed: 3.5GHz

SqLite Version: 3.36.0

Adobe GSDK Version: 1.4.0.171

CPU Utilisation: 3.0%

Power Source: Plugged In

Built-in memory: 32454.9 MB

Dedicated GPU memory used by Lightroom: 744.7MB / 7957.0MB (9%)

Real memory available to Lightroom: 32454.9 MB

Real memory used by Lightroom: 2366.3 MB (7.2%)

Virtual memory used by Lightroom: 3805.8 MB

GDI objects count: 1046

USER objects count: 3706

Process handles count: 3498

Memory cache size: 862.4MB

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: 241MB / 16227MB (1%)

Camera Raw real memory: 247MB / 32454MB (0%)

Cache1: 

Final1- RAM:93.0MB, VRAM:148.0MB, 12AB7312-ACD5-40A4-A1DE-2D05691FC0ED.dng

NT- RAM:93.0MB, VRAM:148.0MB, Combined:241.0MB

Cache2: 

m:862.4MB, n:37.0MB

U-main: 229.0MB

System DPI setting: 144 DPI (high DPI mode)

Desktop composition enabled: Yes

Standard Preview Size: 2048 pixels

Displays: 1) 3840x2160

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 4060 (32.0.15.8142)

Init State: GPU for Export supported by default

User Preference: Auto

Enable HDR in Library: OFF

GPU for Preview Generation: On (S5_7)

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

Library Path: D:\Lightroom Backup Nov 2025\Lightroom Nov2025.lrcat

Settings Folder: C:\Users\j2bel\AppData\Roaming\Adobe\Lightroom

Installed Plugins: 

1) AdobeStock

2) Plugin Parameters

3) Topaz Photo AI

Config.lua flags: 

Adapter #1: Vendor : 10de

Device : 2882

Subsystem : 895e1043

Revision : a1

Video Memory : 7957

Adapter #2: Vendor : 1414

Device : 8c

Subsystem : 0

Revision : 0

Video Memory : 0

AudioDeviceIOBlockSize: 1024

AudioDeviceName: System Default - Speakers (Creative Pebble X)

AudioDeviceNumberOfChannels: 2

AudioDeviceSampleRate: 48000

Build: LR5x26

Direct2DEnabled: false

GL_ACCUM_ALPHA_BITS: 16

GL_ACCUM_BLUE_BITS: 16

GL_ACCUM_GREEN_BITS: 16

GL_ACCUM_RED_BITS: 16

GL_ALPHA_BITS: 0

GL_BLUE_BITS: 8

GL_DEPTH_BITS: 24

GL_GREEN_BITS: 8

GL_MAX_3D_TEXTURE_SIZE: 16384

GL_MAX_TEXTURE_SIZE: 32768

GL_MAX_TEXTURE_UNITS: 4

GL_MAX_VIEWPORT_DIMS: 32768,32768

GL_RED_BITS: 8

GL_RENDERER: NVIDIA GeForce RTX 4060/PCIe/SSE2

GL_SHADING_LANGUAGE_VERSION: 4.60 NVIDIA

GL_STENCIL_BITS: 8

GL_VENDOR: NVIDIA Corporation

GL_VERSION: 4.6.0 NVIDIA 581.42

GPUDeviceEnabled: false

OGLEnabled: true

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[AxelMatt]

Graphics Processor Info: 

DirectX: NVIDIA GeForce RTX 4060 (32.0.15.8142)

Init State: GPU for Export supported by default

By @James278055166zdm

Your grphic device driver is outdated, please install the latest Studio Version.

NVIDIA Studio Driver 581.57 | Windows 11