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LeVent4331688
Inspiring
November 8, 2025
Answered

Several second delay when using Masking tools

  • November 8, 2025
  • 5 replies
  • 380 views

Hello,

 

Since upgrading to my new very powerful system, Lightroom Classic (version 15.0) has been performing extremely slowly.

 

Issue description:

There are significant delays (several seconds, sometimes up to 10 seconds) before Lightroom responds, particularly when using the following tools:

 

• Masking (people, subject, background)
• Color mixer / color correction
• Crop overlay tool

 

All basic adjustments (exposure, contrast, highlights, shadows, etc.) work normally. Other Adobe applications (After Effects, Photoshop, etc.) run completely smoothly. My previous, weaker system did not have these problems.

 

System specifications:

• Windows 11 Pro (x64), Build 26100.6899 (25H2)
• NVIDIA GeForce RTX 5070 Ti (AMD onboard GPU disabled)
• AMD Ryzen 9 9950X (16 cores, 4.30 GHz)
• 128 GB DDR5 RAM (4×32 GB Corsair)
• Mainboard: ASRock X870 Steel Legend WiFi
• Catalog located on an external SanDisk Extreme SSD (1 TB) connected via high-speed USB hub

 

Steps already taken (no improvement):

• Disabled and re-enabled GPU support in Lightroom
• Added Lightroom.exe, cache, and catalog as exceptions in antivirus (Bitdefender)
• Updated NVIDIA drivers (tested both Studio and Game Ready)
• Lightroom (15.0) and Camera Raw (18.0) fully up to date
• Optimized Lightroom catalog
• Verified GPU detection (System Info → GPU correctly recognized and active)
• Cleared Lightroom logs
• Disabled Hardware-Accelerated GPU Scheduling (HAGS)
• Tested multiple catalogs – same behavior

 

Additional notes / observations:

• The delay persists even with GPU acceleration completely disabled.
• All other Adobe applications work flawlessly.
• It appears that Lightroom pauses while internally loading or waiting for data/models (possibly AI models).
• Antivirus (Bitdefender) is unlikely to be the cause, as proper exclusions have been set.

 

Are there any known performance issues with Lightroom Classic 15.0 on Windows 11 (Build 25H2) or the RTX 50-series GPUs (5070 Ti)?

 

I urgently need help resolving this, as Lightroom is currently unusable for efficient work!

    Correct answer LeVent4331688

    I found the cause of the problem.

    It has nothing to do with my system, my graphics card or Windows. It’s simply Lightroom Classic 15/15.1!

    I contacted Adobe Support and granted them remote access to my computer. Despite my detailed error description the support agent immediately disabled the GPU and told me to test it again. I pointed out that I had already done that and asked him to actually read what I wrote. He claimed he had. Then he told me my RTX 5070 Ti was “too old”. -_-

     

    I made it clear that this made no sense because the card was released this year and his explanation sounded more like an excuse. He then backtracked and said I was right but that there are “better models like the GTX 5080”. After that he changed the Windows graphics settings to force Lightroom to use the Nvidia GPU at maximum performance.

    Obviously this didn’t change anything. I didn’t feel like dealing further with a support agent who was clearly out of his depth so I left it at that.

    Here’s the important part: At work I still have my old system (Windows 10 Pro, 2x GTX 1080, 64 GB RAM, Ryzen 9 5950X) running the last version of Lightroom Classic 14 which worked flawlessly. After updating it to Lightroom 15.1 I had the exact same symptoms as on my new system at home.

     

    I wanted to make sure that everyone who is frustrated and dealing with the same or similar issues knows about this.

    5 replies

    michaljanata
    michaljanata
    Inspiring
    November 14, 2025

    same performance issue on different computers - Mac Mini m4 and Win 11... terribly slow generating masks, especially landscape mask options (features)

    L
    LeVent4331688AuthorCorrect answer
    Inspiring
    November 14, 2025

    I found the cause of the problem.

    It has nothing to do with my system, my graphics card or Windows. It’s simply Lightroom Classic 15/15.1!

    I contacted Adobe Support and granted them remote access to my computer. Despite my detailed error description the support agent immediately disabled the GPU and told me to test it again. I pointed out that I had already done that and asked him to actually read what I wrote. He claimed he had. Then he told me my RTX 5070 Ti was “too old”. -_-

     

    I made it clear that this made no sense because the card was released this year and his explanation sounded more like an excuse. He then backtracked and said I was right but that there are “better models like the GTX 5080”. After that he changed the Windows graphics settings to force Lightroom to use the Nvidia GPU at maximum performance.

    Obviously this didn’t change anything. I didn’t feel like dealing further with a support agent who was clearly out of his depth so I left it at that.

    Here’s the important part: At work I still have my old system (Windows 10 Pro, 2x GTX 1080, 64 GB RAM, Ryzen 9 5950X) running the last version of Lightroom Classic 14 which worked flawlessly. After updating it to Lightroom 15.1 I had the exact same symptoms as on my new system at home.

     

    I wanted to make sure that everyone who is frustrated and dealing with the same or similar issues knows about this.

    dj_paige
    dj_paige
    Legend
    November 14, 2025

    I do not doubt you are frustrated, and the issue is real. However ... I disagree with your "solution".

     

    If the solution is as you claim, please explain why my LrC 15 is not showing the problem and most of the LrC 15 users do not have this problem. In fact, there are probably hundreds of thousands of LrC 15 users that do not have this problem ... how do I know? Because they are not complaining about it in this and other forums.

    B
    Bilgen24929658dc1r
    Participant
    November 9, 2025

    Tick off "Use Gpu To Display" once i remove that tick for me made drastic diffrent pc runs smoother when using Lightroom classic 

    johnrellis
    johnrellis
    Legend
    November 9, 2025

    @Bilgen24929658dc1r, "Tick off "Use Gpu To Display" once i remove that tick for me made drastic diffrent pc runs smoother when using Lightroom classic"

     

    If a problem goes away by disabling LR's use of the graphics processor, that more often than not indicates a problem with graphics driver. Try updating your graphics driver by going directly to the manufacturer's web site, rather than relying on Windows Update or a manufacturer's update utility:
    https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html#solution-4

    If that doesn't help, please copy/paste here the entire contents of the LR menu command Help > System Info -- that will let us see exactly which versions of hardware and software LR thinks you're running.

    L
    LeVent4331688Author
    Inspiring
    November 10, 2025

    In my case, there was no change with the GPU disabled, so I think it might be a Windows conflict.

    P
    patrich35255045
    Participant
    November 8, 2025

    I have the same mess on a Mac. I do not get any answers. Tryed all from emptying Cache to  reinstalation. Adobe Support got also absolutely useless. 

    P
    patrich35255045
    Participant
    November 8, 2025

    Lightroom Classic-Version: 15.0 [ 202510171722-44f87028 ]
    Lizenz: Creative Cloud
    Spracheinstellung: de-CH
    Betriebssystem: Mac OS 15
    Version: 15.6.1 [24G90]
    Anwendungsarchitektur: arm64
    Anzahl logischer Prozessoren: 11
    Prozessorgeschwindigkeit: NA
    SQLite-Version: 3.36.0
    Stromquelle: Angeschlossen, 100%
    Integrierter Speicher: 36’864.0 MB
    Dedizierter GPU-Speicher, der von Lightroom verwendet wird: 366.7MB / 27’648.0MB (1%)
    Für Lightroom verfügbarer phys. Speicher: 36’864.0 MB
    Von Lightroom verwendeter phys. Speicher: 4’422.1 MB (11.9%)
    Von Lightroom verwendeter virtueller Speicher: 409’797.7 MB
    Cache-Speichergröße: 60.0MB
    Interne Camera Raw-Version: 18.0 [ 2389 ]
    Maximale Anzahl Threads, die Camera Raw verwendet: 5
    Camera Raw SIMD-Optimierung: SSE2
    Virtueller Speicher in Camera Raw: 355MB / 18431MB (1%)
    Physischer Speicher in Camera Raw: 1238MB / 36864MB (3%)

    Cache1:
    NT- RAM:0.0MB, VRAM:0.0MB, Combined:0.0MB

    Cache2:
    m:60.0MB, n:0.0MB

    U-main: 76.0MB

    Standardvorschaugröße: 1440 Pixel
    Monitore/Anzeigegeräte: 1) 3840x2160

    Informationen zum Grafikprozessor:
    Metal: Apple M3 Pro
    Anfangsstatus: GPU zum Exportieren wird standardmäßig unterstützt
    Benutzerpräferenz: Automatisch
    HDR in Bibliothek aktivieren: AUS
    GPU zur Vorschauerstellung: Auto (S5_27)

    Anwendungsordner: /Applications/Adobe Lightroom Classic
    Bibliothekspfad: /Volumes/2 BIG DOCK 20TB/Pictures/Lightroom/AA_Katalog_05_2025/AA_Katalog_05_2025.lrcat
    Einstellungen-Ordner: /Users/berbel/Library/Application Support/Adobe/Lightroom

    Installierte Zusatzmodule:
    1) AdobeStock
    2) Aperture/iPhoto-Import-Zusatzmodul
    3) Export to Autopano Pro 3
    4) Export to Photomatix Pro
    5) Exportiere nach PanoramaStudio 3 Pro
    6) Exportiere nach PanoramaStudio 4 Pro
    7) Flickr

    Config.lua-Flags:

     

     

    P
    patrich35255045
    Participant
    November 8, 2025

    Croping takes at least 60 Seconds. Deleting a Picture also. Exporting to Photoshop... Impossible... // This is only since that Super Duper Update... Not that it belongs here. I wanted to renew my subscription. Now I have two of them. Support prommised to fix it in 24h. This was 4 Days ago. So I hvae no hope that there is soon a Update who let me do my work in Minutes instead of hours. (Sorry... I am a little frustrated)

    johnrellis
    johnrellis
    Legend
    November 8, 2025

    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.

    L
    LeVent4331688Author
    Inspiring
    November 9, 2025

    Lightroom Classic-Version: 15.0 [ 202510171722-44f87028 ]
    Lizenz: Creative Cloud
    Spracheinstellung: de
    Betriebssystem: Windows 11 - Business Edition
    Version: 11.0.26200
    Anwendungsarchitektur: x64
    Systemarchitektur: x64
    Anzahl logischer Prozessoren: 32
    Prozessorgeschwindigkeit: 4,2GHz
    SQLite-Version: 3.36.0
    CPU-Auslastung: 3,0%
    Stromquelle: Angeschlossen
    Integrierter Speicher: 128598,3 MB
    Dedizierter GPU-Speicher, der von Lightroom verwendet wird: 5167,2MB / 15907,0MB (32%)
    Für Lightroom verfügbarer phys. Speicher: 128598,3 MB
    Von Lightroom verwendeter phys. Speicher: 2604,2 MB (2,0%)
    Von Lightroom verwendeter virtueller Speicher: 8587,1 MB
    Anzahl GDI-Objekte: 707
    Anzahl BENUTZER-Objekte: 2526
    Anzahl Prozess-Handles: 2860
    Cache-Speichergröße: 1262,4MB
    Interne Camera Raw-Version: 18.0 [ 2389 ]
    Maximale Anzahl Threads, die Camera Raw verwendet: 5
    Camera Raw SIMD-Optimierung: SSE2,AVX,AVX2
    Virtueller Speicher in Camera Raw: 909MB / 64299MB (1%)
    Physischer Speicher in Camera Raw: 931MB / 128598MB (0%)

    Cache1:
    Final1- RAM:358,0MB, VRAM:3268,0MB, _DSC7056.ARW
    NT- RAM:358,0MB, VRAM:3268,0MB, Combined:3626,0MB

    Cache2:
    m:1262,4MB, n:189,5MB

    U-main: 86,0MB

    DPI-Einstellung des Systems: 192 DPI (High-DPI-Modus)
    Desktop-Komposition aktiviert: Ja
    Standardvorschaugröße: 3840 Pixel
    Monitore/Anzeigegeräte: 1) 3840x2160
    Eingabetypen: Multitouch: Nein, integrierte Toucheingabe: Nein, integrierter Stift: Ja, externe Toucheingabe: Nein, externer Stift: Ja, Tastatur: Nein

    Informationen zum Grafikprozessor:
    DirectX: NVIDIA GeForce RTX 5070 Ti (32.0.15.8180)
    Anfangsstatus: GPU zum Exportieren wird standardmäßig unterstützt
    Benutzerpräferenz: GPU für Bildverarbeitung aktiviert
    HDR in Bibliothek aktivieren: AUS
    GPU zur Vorschauerstellung: Auto (S5_15)

    Anwendungsordner: C:\Program Files\Adobe\Adobe Lightroom Classic
    Bibliothekspfad: E:\Mehlhose\Katalog\Katalog.lrcat
    Einstellungen-Ordner: C:\Users\Flow\AppData\Roaming\Adobe\Lightroom

    Installierte Zusatzmodule:
    1) AdobeStock
    2) Calibrite Camera Calibration
    3) Flickr
    4) Topaz Photo AI

    Config.lua-Flags:

    Adapter Nr. 1: Anbieter : 10de
    Gerät : 2c05
    Subsystem : 89f41043
    Version : a1
    Grafikspeicher : 15907
    Adapter Nr. 2: Anbieter : 1414
    Gerät : 8c
    Subsystem : 0
    Version : 0
    Grafikspeicher : 0
    AudioDeviceIOBlockSize: 1024
    AudioDeviceName: System Default - Lautsprecher (Realtek USB Audio)
    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 5070 Ti/PCIe/SSE2
    GL_SHADING_LANGUAGE_VERSION: 4.60 NVIDIA
    GL_STENCIL_BITS: 8
    GL_VENDOR: NVIDIA Corporation
    GL_VERSION: 4.6.0 NVIDIA 581.80
    GPUDeviceEnabled: false
    OGLEnabled: true
    GL_EXTENSIONS: GL_AMD_multi_draw_indirect GL_AMD_seamless_cubemap_per_texture GL_AMD_vertex_shader_viewport_index GL_AMD_vertex_shader_layer GL_ARB_arrays_of_arrays GL_ARB_base_instance GL_ARB_bindless_texture GL_ARB_blend_func_extended GL_ARB_buffer_storage GL_ARB_clear_buffer_object GL_ARB_clear_texture GL_ARB_clip_control GL_ARB_color_buffer_float GL_ARB_compatibility GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_compute_shader GL_ARB_compute_variable_group_size GL_ARB_conditional_render_inverted GL_ARB_copy_buffer GL_ARB_copy_image GL_ARB_cull_distance GL_ARB_debug_output GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_derivative_control GL_ARB_direct_state_access GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_draw_elements_base_vertex GL_ARB_draw_instanced GL_ARB_enhanced_layouts GL_ARB_ES2_compatibility GL_ARB_ES3_compatibility GL_ARB_ES3_1_compatibility GL_ARB_ES3_2_compatibility GL_ARB_explicit_attrib_location GL_ARB_explicit_uniform_location GL_ARB_fragment_coord_conventions GL_ARB_fragment_layer_viewport GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_fragment_shader_interlock GL_ARB_framebuffer_no_attachments GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB GL_ARB_geometry_shader4 GL_ARB_get_program_binary GL_ARB_get_texture_sub_image GL_ARB_gl_spirv GL_ARB_gpu_shader5 GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader_int64 GL_ARB_half_float_pixel GL_ARB_half_float_vertex GL_ARB_imaging GL_ARB_indirect_parameters GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_internalformat_query2 GL_ARB_invalidate_subdata GL_ARB_map_buffer_alignment GL_ARB_map_buffer_range GL_ARB_multi_bind GL_ARB_multi_draw_indirect GL_ARB_multisample GL_ARB_multitexture GL_ARB_occlusion_query GL_ARB_occlusion_query2 GL_ARB_parallel_shader_compile GL_ARB_pipeline_statistics_query GL_ARB_pixel_buffer_object GL_ARB_point_parameters GL_ARB_point_sprite GL_ARB_polygon_offset_clamp GL_ARB_post_depth_coverage GL_ARB_program_interface_query GL_ARB_provoking_vertex GL_ARB_query_buffer_object GL_ARB_robust_buffer_access_behavior GL_ARB_robustness GL_ARB_sample_locations GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_seamless_cube_map GL_ARB_seamless_cubemap_per_texture GL_ARB_separate_shader_objects GL_ARB_shader_atomic_counter_ops GL_ARB_shader_atomic_counters GL_ARB_shader_ballot GL_ARB_shader_bit_encoding GL_ARB_shader_clock GL_ARB_shader_draw_parameters GL_ARB_shader_group_vote GL_ARB_shader_image_load_store GL_ARB_shader_image_size GL_ARB_shader_objects GL_ARB_shader_precision GL_ARB_shader_storage_buffer_object GL_ARB_shader_subroutine GL_ARB_shader_texture_image_samples GL_ARB_shader_texture_lod GL_ARB_shading_language_100 GL_ARB_shader_viewport_layer_array GL_ARB_shading_language_420pack GL_ARB_shading_language_include GL_ARB_shading_language_packing GL_ARB_shadow GL_ARB_sparse_buffer GL_ARB_sparse_texture 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    johnrellis
    johnrellis
    Legend
    November 9, 2025

    @LeVent4331688: "DirectX: NVIDIA GeForce RTX 5070 Ti (32.0.15.8180)"

     

    That driver is a Game Ready driver, which doesn't get as much testing for creative apps like LR. Nvidia and Adobe recommend using the latest Studio driver instead:

    https://www.nvidia.com/en-us/drivers/details/257327/

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