Skip to main content
Adobe Photoshop Family

31 Messages

 • 

860 Points

Thu, Sep 22, 2016 8:45 AM

Lightroom: Slow performance on Xeon CPUs

I noticed that LR clone and brush tool on my XEON E5-1650 0 3.20GHz (Attention: E5-1650 0 and not E5-1650 v4) can not stress my CPU and after x minutes of working LR slow down, until I have to restart it.

Please see the full diskussion with the problem here: https://forums.adobe.com/thread/2210245 (test with different Lightroom versions, confrontation with a weak laptop, that works fine, tests wit other graphic grafic card, test with other bios settings etc. No results. Only restart LR or minor display resolution helps.)

Can anyone with an XEON E5-1650 0 3.2Ghz confirm this?

Responses

Official Solution

Employee

 • 

1.7K Messages

 • 

32.4K Points

4 years ago

What does Lightroom's Help>System Info... say? It should report the processor count and the maximum number of thread count used by the image processing pipeline?

Some made the observation that Lr was performant right after a launch and then gets slower after intense brushing. Is it on a single photo or do you typically have to walk several photos to reproduce it? Do you remember which version of Lr this started to happen? Do you have Lr mobile sync turned on? What happens if you pause the sync and then relaunch Lr?

Principal Scientist, Adobe Lightroom

Official Solution

Employee

 • 

1.7K Messages

 • 

32.4K Points

4 years ago

@Dietmar reported that the issue is found to be in 2015.5, 2015.5.1, 2015.6, 2015.6.1 as well. It would be helpful to post the Lightroom's Help>System Info...

Principal Scientist, Adobe Lightroom

3 Messages

 • 

86 Points

I started having slow performance issues around August of this year - 2016 - It was after an update was installed, but I do not recall what the version number was!

Champion

 • 

5K Messages

 • 

91.7K Points

LR CC 2015.6.1 was released 7/25.   So you might consider rolling back to 2015.6: https://helpx.adobe.com/lightroom/kb/roll-back-to-prior-update.html

Official Solution

Employee

 • 

1.7K Messages

 • 

32.4K Points

4 years ago

@Dietmar You've provided additional detailed info in https://forums.adobe.com/thread/2210245. That is very helpful. Are the summary of your previous findings (copied as-is) still applies with the Lr 2015.7 and Camera Raw 9.7 release?

Summary
  1. LR/Camera Raw has definitive a performance problem with some - especially my high-quality – PCs!
  2. I can reproduce the problem and I can demonstrate that the problem on other - especially my weak – PCs not persist or is not so strongly.
  3. With GPU on the problem increase drastically!
  4. Camera RAW from Bridge and Photoshop have the same problem.
  5. With higher lightroom version the problem increase! Also with the newest 2015.6.1!
  6. Camera Raw Cache amll/big. No difference.
  7. Minimize LR, not helps or helps only minimal.
  8. Downgrade helps a little, but not eliminate the problem in general.
  9. Restart LR, helps but restart LR every X images are not a good workaround!
  10. It is very frustrating that with LR my weakness machine is better than my best PC!

Principal Scientist, Adobe Lightroom

31 Messages

 • 

860 Points

You found my system info under: https://forums.adobe.com/thread/2210245

Yes the same with LR 2015.7. The problem with 2015.7 seams a little increased (=I can reproduce it faster!)

I can reproduce the observation that LR is performant right after a launch and then gets slower after intense brushing also with one single photo, but with walk over several photos I can reproduce it faster.

I tuned off all: sync, face recognition etc.

Now I will extent the summary:

 

1. Different photo type of different cameras: no difference
2. Now I'm not sure that a reduction of CPU kernels helps a lot. I tested with:

start /affinity F cmd.exe /c "c:\Program Files\Adobe\Adobe Lightroom\lightroom.exe"

and also with the tool "Process lasso".

Seems that not help much. Helps only a little to increase the time until the problem occurs. Or on 2015.7 helps fewer than with 2015.6.1 (I mad my first tests with 2015.6.1, now with 2015.7)

3. The problem is not only a brush or a clone problem. It is a general problem in the develop module when I must elaborate many photos in one session. But with brush and clone tool I can reproduce it very fast!

Employee

 • 

1.7K Messages

 • 

32.4K Points

Is it reproducible in Camera Raw 9.7?

Principal Scientist, Adobe Lightroom

438 Messages

 • 

6.5K Points

My main complaint in the past few years has been about the slowdown in rendering 1:1 previews of my 40MB nefs. However, some tests yesterday showed that this may have been cured somewhere along the update line to CC 2015.7

I selected 2700 40MB nefs (D810) without any edits (I reimported them into a separate folder and allowed LR to settle down for an hour or so), and then started rendering 1:1 previews (after allowing LR to render the standard previews as part of the import.)

At first they were taking about 4.0 secs per image, but soon settled down to 5.0 secs per image. They stayed at 5 secs until the completion in about 3.5 hrs. No slowdown with the i7-5930 6/12 core cpu (all 12 logical processors in use according to system info).

Then I ran LR (CC 2015.7) again (after deleting the 1:1 previews, restarting LR and allowing it to settle down again), but with the affinity set to FF (using logical processors 0-7). LR system info then said it was using 8 logical processors out of the 12 available. The time at start for each image was 4.6 secs, but soon settled down again to 5 secs, and stayed at 5 secs to the end.


Conclusions: No slowdown in rendering over 3.5 hrs, and no significant effect of using 4/8 cores or 6/12 cores. So my old problem seems to have been solved. I must do a big run sometime - overnight and see what happens then, but I'm optimistic.

But I haven't tested simply editing a load of files in succession with 8 or 12 cores. More coffee or something stronger needed for that!

Bob Frost


31 Messages

 • 

860 Points

@Simon Chen: yes it is reproducible in Camera Raw 9.7.

438 Messages

 • 

6.5K Points

CORRECTION! My old problem of 1:1 rendering slowing down with time only seems to be true if the nefs are unedited.

I just repeated one run with LR using just 8 cores, but with the following edits (Autotune/Punch10/Sharpen/CameraNeutral/Noise/LensCorrection/ WBAuto/GradFilter/8Spotsremove). I edited the first file and then pasted the edits to the rest of the 2700 nefs, and re-rendered standard previews.

When LR had settled down, I then rendered 1:1 previews of the 2700 files. At start the edited images were taking 12 secs to render, BUT after only 1000 images they were taking 20 secs to render!!

I stopped the rendering and restarted LR and the rendering was back to 12 secs. That has been my experience in the past; so the increase in rendering time has something to do with rendering the edits.


I'll repeat this with all 12 cores used in LR tomorrow.


Bob Frost

Official Solution

Employee

 • 

1.7K Messages

 • 

32.4K Points

4 years ago

Can you folks pin-point for certainty the specific version of Lightroom that starts exhibiting the same performance issue under the same machine setup? That would be helpful us to figure what happened. 

Here is a link where you can rollback to the earlier Lightroom versions https://helpx.adobe.com/lightroom/kb/lightroom-downloads.html.

Principal Scientist, Adobe Lightroom

Official Solution

Employee

 • 

1.7K Messages

 • 

32.4K Points

3 years ago

If you are an existing Lr Classic CC customer, and would like to test out a developer preview build that we think fixes this performance issue. Please send me a note and I'll make sure that you are invited to the prerelease program. Thanks.

Principal Scientist, Adobe Lightroom

6 Messages

 • 

174 Points

I would definitely be interested in testing. I am a real estate photographer and I just got a Nikon D850. The raw files are huge and I can really feel it in Lightroom.

reed@TripleRPhotography.com

Employee

 • 

1.7K Messages

 • 

32.4K Points

Hi Reed, you should see an invitation email to join the program.

Principal Scientist, Adobe Lightroom

6 Messages

 • 

174 Points

Super, Thanks!

409 Messages

 • 

7.7K Points

How we looking for upcoming 18-core Xeon iMac pro?

5 Messages

 • 

108 Points

I also would like testing. I have a catalog with 150.000 RAW photos. Speed is always an issue.
info@hagens-world-photography.de

87 Messages

 • 

1.6K Points

4 years ago

Which Version of Lightroom is running on that Computers?

31 Messages

 • 

860 Points

Now version 2015.7, but I tested also with 2015.5, 2015.5.1, 2015.6, 2015.6.1. The problem ist version  independent.

5 Messages

 • 

108 Points

I can confirm the problem with a E5-1650 v4

7 Messages

 • 

256 Points

I have exactly the same problem with E5-1620 v3 @3.50GHz and last LR (at the moment CC 2015.8)

31 Messages

 • 

860 Points

4 years ago

Anyone can confirm, that LR have performance problems with clone or brush tool on workstations with 6 or more cores?

Champion

 • 

5K Messages

 • 

91.7K Points

4 years ago

Reading through the extensive discussion in the other thread, two other troubleshooting steps come to mind:

- Does LR's memory usage as reported in Task Manager increase dramatically as it slows down?   That's a typical symptom of a memory leak.

- Try restricting LR to running on 1, 2, 3, or 4 processors.  Open a command prompt and paste this line:
start /affinity F cmd.exe /c "c:\Program Files\Adobe\Adobe Lightroom\lightroom.exe"
An affinity mask of "F" specifies 4 processors; use "7" for 3 processors, "3" for 2 processors, and "1" for 1 processor. (The mask is a bit mask specified in hex.) 

Champion

 • 

5K Messages

 • 

91.7K Points

Note that the seemingly superfluous use of "cmd.exe" appears to be necessary due to the way that LR starts itself.

31 Messages

 • 

860 Points

a) no memory usage not increase dramatically. Memory usage stay around 30 - 50 %. Never more.

b) with your tip I tried different number of cores. With 1 core: slower, with 2 cores slower, with 3 and with 4 cores faster. The problem is not resolved with 4 cores, but seams not so dramatically. The brush is smoother and a little faster than with all 6 cores. On images with not so much local corrections, the difference (4 cores to 6 cores) is bigger (4 cores faster than 6 cores). With images with many corrections, the difference is not so big.

Seams that core support is the crucial point in LR.

Champion

 • 

5K Messages

 • 

91.7K Points

I believe you indicated that with 6 cores, LR would slow down more and more after 3 photos, soon becoming unusable.  With 2 or 3 cores, LR clearly will run slower; but does it get slower over time and then become unusable, or does it just stay slow without getting worse?

31 Messages

 • 

860 Points

Unfortunaly my englisch is very bad.

a)
I would say: with 4 cores LR is faster than with 6 cores:

4 cores: faster and smoother
6 cores: slower and not so smooth

b)
Yes, LR does get slower over time and then become unusable:
with 4 cores: over more time
with 6 cores: over less time

No, when I do nothing, then no problem.

Champion

 • 

5K Messages

 • 

91.7K Points

Your English is quite sufficient!

Large numbers of people use LR with 4 cores (8 virtual processors).  There have been a few reports on this forum of people successfully using 6, 8, and 10 cores (12, 16, and 20 virtual processors).   So there must be something particular about your configuration or hardware.

Champion

 • 

2.1K Messages

 • 

36.4K Points

4 years ago

John, are you saying using Windows Task Manger's 'Set Affinity' does not work with LR?

Champion

 • 

5K Messages

 • 

91.7K Points

No. The use of "cmd.exe" is required with the "start" command, probably because of something funky LR does on its start up.

I don't think using the Task Manager to set affinity of a running LR process would be as good a test. It's possible that LR makes some decisions about how many processors to use early in its startup sequence, and setting affinity with the Task Manager would be too late.

Champion

 • 

2.1K Messages

 • 

36.4K Points

That makes sense. On startup LR determines the available processor cores and distributes the workload using a muli-processing algorithm. With 6 or more cores the algorithm fails and LR's performance drops. If this is the case then restricting the available cores on systems with 6 or more core processors should improve performance. I suggest also testing with hyperthreading both enabled and disabled in the system BIOS.

Puget Systems did similar testing of LR6, but they didn't run any benchmarks for Develop module control performance (Tone, Adjustment Brush, etc.).
https://www.pugetsystems.com/labs/articles/Adobe-Lightroom-CC-6-Multi-Core-Performance-649/

31 Messages

 • 

860 Points

I had already tested with hyperthreading off. Slight improvement, but only very slightly...

38 Messages

 • 

1.1K Points

Affinity has no point whatsoever. On my 6/12-core at least not. This is complete nonsense. 
Lightroom uses all cores (all 12 logic cores) when exporting, creating 1:1 previews etc. While editing it uses for 1 core of power, maybe 2. I can set affinity to only 1 core and performance would not suffer mauch. But it would be huge difference on export. If U se GPU there is boost in performance regardless of number of cores. But for brush, I need to switch off GPU in settings. Which is annoying, and I do not do it always. Brushes doing ok under GPU, I just do not see what I'm, painting until I stop and area get overlay. For simple things I paint on "air". If I need to be precise, I turn GPU off. Annoying. SInce I use Lr only for "preset/auto" stff latelly I don't care anymoore. Adobe will lost one customer when my 1 year CC runs off. No point wasting my creative life here. 100's of replyes and no solution. It can't be...

31 Messages

 • 

860 Points

4 years ago

Also interesting: I have made all tested with photos of my D5100 (RAW 15 MB). Now, I tested with photos of my D800E (RAW 35 MB). The problem remain exact the same. It is interesting, that the problem is not aggravated with bigger images. Exact the same.

I think that this excludes memory problems.

Champion

 • 

2.1K Messages

 • 

36.4K Points

I ran a similar LR CC2015.7 test with Canon 5Ds 50 Megapixel raw files. The Basic controls and Adjustment Brush performance was very acceptable and virtually the same as when processing Cannon 5D MKII 21 Megapixel files. Given the 5Ds resolution is more than 2x the 5D MKII files I expected to see a proportional slow down (lag) in the controls and Adjustment Brush.

What I did notice is that CPU Usage never exceeds ~50% when using the Tone controls or Adjustment. When adjusting the Detail panel Luminance slider all 8 cores (4 core processor with Hyperthreading enabled) are at 100%. This is with an i7-860 quad-core processor:

Champion

 • 

5K Messages

 • 

91.7K Points

It isn't surprising that some sliders use parallelism more effectively than others.  Adobe engineers have long indicated that much of the Camera Raw pipeline is inherently not easily parallelizable (thus, the difficulties of effectively using GPUs).  

Champion

 • 

5K Messages

 • 

91.7K Points

"I think that this excludes memory problems."

Agreed.

Champion

 • 

5K Messages

 • 

91.7K Points

"But I find here in the forum also people using 6 and more cores with problems! Examples: https://feedback.photoshop.com/photoshop_family/topics/lightroom-2015-6-extremely-slow"

Thanks for finding that. I searched last night for similar reports but didn't find any.  I'll consider whether to merge this topic in with the others.   In general, it's important that all the reports of similar problems are merged into one thread, so that Adobe can properly appreciate the scope of the problem. But merging partially hides the existing replies.

31 Messages

 • 

860 Points

What I did notice is that CPU Usage never exceeds ~50% when using the Tone controls or Adjustment.
I can confirm. Hyperthreading on/off no big difference.

150 Messages

 • 

2.9K Points

4 years ago

you will also notice that if you export images after lightroom restart it will be much faster and the CPU will reach 100% but if you do the same export after working on some images and the slowness sets in the same export will take much longer the lightroom will not max out the CPU usage. see more on this tread. https://feedback.photoshop.com/photoshop_family/topics/lightroom-image-export-is-much-faster-after-restart-cc-2016-6-1-and-before I suspect this is also linked to 6 or more CPUs as you will see on the link above when Stefan tried to replicate it on 4 cores CPU there was no reduction in speed.

31 Messages

 • 

860 Points

4 years ago

This is definitely my last test (I spend a lot of time for testing)!

In forum adobe a user sad: downgrade to 2015.4 helps.

I tested it. Result: not helps!

438 Messages

 • 

6.5K Points

4 years ago

Can we have a comment from Adobe on this please. Can't you replicate it?


Bob frost

31 Messages

 • 

860 Points

4 years ago

I think I forgot an important point on my summary (in the adobe forum I have said it):
Point 11: When I reduce the resolution of my the display to 1280x1024 that helps a lot. Then slow down only  after more time... 

I would say that the problem "slow down" has to do with not only with cpu, but also with display resolution ( but not with graphic cards or driver because I tested with different graphic cards).

P.S. Is here anyone from Adobe? I wonder if it makes sense post experiences, or it is lost time? A statement: We know the problem and working on it, would help;-) 

150 Messages

 • 

2.9K Points

everything you have just said has been reported before:
slowness on hi resolution displays.
slowdown after working on some images and need to restart

the new thing is that you managed to narrow the decreasing performance problem to more than 4 CPU's which is a progress.

also there is a significant reduction in the speed of image export if lightroom was open and some image editing was done prior to the export. if you want fast export then restart lightroom then do the export or press the publish button.

Adobe at least tell us if you can replicate the problem or not and stop wasting our time on this forum.

don't keep us in the dark!

I live near the Adobe HQ in Maidenhead Berkshire, UK. I can bring my computer to you and show you all those issues. we can install testing software on it. anything you need. my copmuter is i7 5960X 8 core + 4K display which has similar issues to the xeon CPUs

let me know.

438 Messages

 • 

6.5K Points

There seems to have been no change in this problem since my last thread on this subject in June 2015.

Bob Frost

215 Messages

 • 

4.8K Points

4 years ago

Servus Dietmar,
I'm using LR on an i7 6 core machine and after upgrading to a 4k display I'm experiencing similar massive performance problems.

8 Messages

 • 

174 Points

Same here and I've recently upgraded to a 10 core machine with a 4K display. It is so slow processing after the first few images that I just gave up. I'm using C1 in the interim until there is some sort of fix out.

3 Messages

 • 

86 Points

I have a 4k display with an 8 core i-7 with 24GB RAM and I am basically dead in the water - I have been editing the same wedding since last Wednesday (5 days so far - 1800 .nef's!)

I can not live like this!  I will have to go back to using the Photoshop Image processor if this does not change soon!