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    Lightroom Classic CC seems slower than previous Lightroom version it replaced

    brente978 Level 1

      Lightroom Classic CC seems slower than previous Lightroom version it replaced.  To test the performance of the new classic update, I imported some raw pictures taken with a Nikon D810/D850 and am noticing that moving from one image to another (all with 1:1 previews) in the Develop module takes 4 seconds before the image is displayed after pressing an arrow key to move (or using the mouse to select an image).  When you move to another image, the UI is repainted first (and, i assume, the histogram calculated, etc.), and then the image is displayed on the screen.  Moving between the Library and Develop modules also results in about a 4 second delay before the image is displayed.  Moving between pictures in the Library module is almost instantaneous. 

       

      This level of performance is unacceptable.  Doing a copy/paste of settings from one image to another takes longer in the latest Lightroom than in the previous one as the time needed to display the image seems to slow everything down, thus slowing down the entire workflow process.

       

      Another quick test was to press the right arrow key 10 times in succession in the Develop module to move between images.  It took Lightroom Classic CC 20 seconds before the UI finally caught up and displayed the desired image.  Doing the same in the Library module takes about 3 seconds.

       

      Or, is this just the level of performance to be expected?  Was this not tested during the beta process, or just deemed satisfactory by Adobe? 

       

      What's the best way to get feedback directly to Adobe on this?

        • 1. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
          99jon Adobe Community Professional & MVP

          My own experience is that Lr Classic is definitely faster although I have a different workflow. I import using “embedded and sidecar” and then make my picks. The camera previews appear almost instantaneously. After discarding the rejects I generate 1:1 previews for the keepers. I never jump along the filmstrip as these are images I want to spend a little time with editing each.

          3 people found this helpful
          • 2. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
            JimHess Adobe Community Professional & MVP

            In the Lightroom preferences, on the performance tab, have you selected this option?

            Capture.JPG

            4 people found this helpful
            • 3. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
              brente978 Level 1

              Thanks for the feedback.  When you say that "camera previews appear almost instantaneously," is that in the develop module?

               

              I went ahead and reinstalled Lightroom CC 2015 (the previous release) and moving between images in the develop module is almost instantaneous.  So, something seems to be broken (or changed) in the new Lightroom Classic CC version...

               

              I don't usually jump along the filmstrip, but just used that as a example to show how the performance degradation can be compounded when doing multiple actions.

               

              For my workflow, I'll import the images and have 1:1 previews generated at time of import (I use a sidecar XMP).  After I select the images to work on, I'll edit an image and then either sync or copy/paste settings from one image to another.  While Lightroom CC wasn't a speed demon (and seemed to get slower release after release), Lightroom Classic CC seems to pale by comparison.

               

              It also looks like exiting LR Classic CC and restarting it helped a bit as the time has gone down from 4 seconds to 2-3, but still seems slower than LR 2015

              2 people found this helpful
              • 4. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                brente978 Level 1

                Thanks for the tip.  I checked the Smart Previews preference setting and it was off.  Unfortunately, I turned it on and saw little to no difference in performance.

                 

                I always built Smart Previews in LR CC 2015, but didn't see a setting for turning on/off the use of smart previews as a preference setting

                • 5. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                  99jon Adobe Community Professional & MVP

                  I would recommend trying embedded & sidecar from the import dialog – see image below. They appear in the Library with an overlay to indicate they are from the camera. The D850 has large files. They embedded are full resolution jpeg previews as you see on the back of your Nikon.

                   

                  embedSidecar.jpg

                  • 6. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                    brente978 Level 1

                    Thanks 99jon - except, would that only affect the import performance when building previews?

                     

                    I know that building previews is supposed to be faster in LR Classic CC, but haven't tested against LR CC 2015.

                     

                    I'll give it a try at least!

                    • 7. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                      andreamrg Level 1

                      hi Brente,

                      when you turned on the option to use Smart Previews instead of original files... did you generated them?
                      Because if you have no Smart Previews generated you're still viewing the original resolution file, and of course you can't have any gain in performance.

                      • 8. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                        brente978 Level 1

                        Good question.  Yes, I had “build smart previews” checked on at the time of import.

                        • 9. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                          mickspawn Level 1

                          why should he need to select this option when before he didnt need to select this option and Lightroom was faster?

                           

                          THE ONLY THING that they fixed is scrolling between photos in Library.

                           

                          Go start zooming in and see how slow render times are.  Zoom in then start scrolling in Library mode.  Go into develop module and start flicking between photos seeing how long render takes.

                           

                          They are all slower than the previous lightroom.  All i do is use Lightroom for work.


                          THE NEW VERSION OF LIGHTROOM BROKE MORE THAN IT FIXED!

                          9 people found this helpful
                          • 10. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                            srailkb Level 1

                            I'm also seeing equally slow (actually very slightly slower) performance with the new Lightroom Classic CC.  I shoot events, and need to get photos out quickly.  When I have an album with a lot of adjustments (crops, exposure tweaks, brush/filter adjustments, sharpening/noise changes, lens corrections, etc.), it's just painfully slow to do anything - get a crop frame to appear, use the "alt" key to see clipping, etc., etc.  3-5+ seconds there and still taking 5+ seconds to render when I move to the next image. 

                             

                            I have a fast i7-based machine with SSD's and plenty of RAM.  I've tried all the performance tweaks before (and still have those set as my default options).  I'm not going to keep chasing this rainbow.  All I can say is using ANY other competitive product is at least 3x faster (total time to produce a finished album), without the need for a single tweak.  With those, I move quickly between pictures, and adjustments are near-instantaneous.  IMO, it's definitely some sort of memory issue (and yes, I have graphics processor acceleration off, have a huge cache specified (on an SSD), 1:1 previews, etc.).  I've been using this new version since yesterday and it gets progressively worse the more work I do, just like the old version.  It "rebounds" a little (but only for a little while) when I restart the program, but I can't afford to be doing that every 5-10 minutes.

                             

                            This version is not an improvement for me at all.  Same exact problem(s)!  Did they even beta test this on machines that were showing the problems before??

                            6 people found this helpful
                            • 11. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                              mickspawn Level 1

                              of course they didn't test it, and of course they have no clue about anything.  They are complete morons.


                              Dont forget they have been telling us for the past 2 years they have fixed things but never have.

                               

                               

                              What a useless smoke screen this release is.  I have extensively tested and me and all friends report the same behaviour.

                               

                              You have fixed scrolling photos in Library view but have broken countless other things making it completely useless.  What a pathetic moronic company.  I am shocked.  I was really excited for this release.

                               

                              I have just reverted back to 2015 and it is running dog slow but less dog slow.

                               

                              I doubt any moderator will even read this.  Keep in mind i've been testing Adobe products on high end machines for 2 years dealing with engineers at Adobe tirelessly and i know what i am talking about.

                              2 people found this helpful
                              • 12. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                robd75569337 Level 1

                                Yes I've noticed Classic is slower on my late 2015 iMac. Particularly when moving the sliders. Previously Lightroom rendered changes instantaneously when adjusting sliders. Now with Classic there is lag :-( On the other hand it absolutely flys on my 2011 MacBook Pro. But I use it mainly on my iMac so I have to say this reduction in performance is disappointing.

                                 

                                1TB SSD

                                4 GHz Intel Core i7

                                16 GB 1867 MHz DDR3

                                AMD Radeon R9 M395 2048 MB

                                1 person found this helpful
                                • 13. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                  carminecuccuru Level 1

                                  True!! My version is very slow. Previously version of Lightroom render good...it's slow now.

                                  When I use "Remove Profile Correction", for example, takes 3/4 seconds before redering image. The brush is slow and when I using it heats up the GPU Diode and the fan flies ...

                                   

                                   

                                  iMac Retina 5K 27 '

                                  Intel i7 4Ghz

                                  32 Gb Ram

                                  AMD Radeon R9 M395X 4 GB

                                  • 14. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                    mrjackson Level 1

                                    Running a PC here with Windows 7. LR Classic is much slower all around and especially when importing.

                                     

                                    My first attempt to import a set of new photos was so miserable, I closed down all programs and rebooted.

                                     

                                    I set the imported files to go to an SSD drive from a USB3 card reader, and with no other programs running. I also turned off the option to create a copy of the imported files to the backup drive. I turned off Sync to LR Mobile, Face Recognition, and the GPS location option during the import. I did not have 1:1 turned on.

                                     

                                    It took 28 minutes when importing 297 Nikon D5 images, plus another two minutes to finish Fetching the Previews. I am not sure what is going on in the background, but it took four or five minutes to see the first three images.

                                     

                                    While importing, the Import folder showed new images, but the "Current Import" only showed half a dozen when it had already imported 100 or more.

                                     

                                    After import the 297 images, I did some basic Develop adjustments on one image, then clicked "Previous" on the next image. It took so long I thought the system had locked up, but it eventually processed the second image.

                                     

                                    Even though the new version might show some promise, this initial release is a big step backwards.

                                    2 people found this helpful
                                    • 15. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                      georgeb99766764 Level 1

                                      Absurdly sloooooooooooow!  I thought my Macbook locked up on me.  It's literally taking 4 seconds to complete a task.  Simple dodge and burn, even cropping.  Click on the crop tool and the screen goes blank for a few seconds, then the image appears.  This is a significant loss in production time and is clearly affecting the quality of my work. 

                                       

                                      I started processing images from three shoots around 12:30 and just finished up at 5:15pm. This task should have been completed at least two hours ago.  Looks like I'll be reverting back to the previous version until Adobe fixes the problem. 

                                      • 16. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                        mickspawn Level 1

                                        Yes im using a late 2015 iMac and rendering is twice as slow now.   Anything with multiple edits is twice as slow as old version.  Zooming is twice as slow.  Develop module is 1.5 times as slow. Slideshow twice as slow

                                         

                                        Like i said there is only 1 improvement while breaking everything else and that is the speed of flicking through photos in "LIBRARY".  In develop flicking between photos is painful.

                                         

                                        Horrible version.  I wonder how we get Adobe to notice this thread?  They really do a pathetic job of testing things properly.  Talking it up how great their new version is.. LOL what a joke.  They have egg on their face.

                                         

                                        >The main issue is the rendering engine< They can never fix the rendering engine problem.  They try to do a lame work around.  When changing pictures there is a 2-3 second delay to render it on iMac 5k.  The old version theres a 1-1.5 second delay.

                                         

                                        Adobe when will you fix the rendering issue for 5k screens.  Worry about 5k screens as that is where the problem is.  There is no other problem.  Only the rendering engine.

                                        • 17. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                          mrjackson Level 1

                                          My processing speed is fast enough in the Develop module, but importing is terribly slow. However, Develop is painfully slow while it is importing files. The crop tool will never load while importing. In other words, I can't do any work until the import is complete and that takes way too long.

                                           

                                          Others in this thread mentioned reinstalling Lightroom 2015 after having issues with this initial release of LR Classic. I need to roll back to LR 2015. How did you do it?

                                          • 18. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                            99jon Adobe Community Professional & MVP

                                            Have you tried selecting embed & sidecar in the import dialog. I find I can start working almost instantly as the embedded previews created by the camera are being used initially – see image below.

                                             

                                            embedSidecar.jpg

                                            • 19. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                              campbelld84007413 Level 1

                                              Today I used the new classic for some workflows using canon, sadly it was much slower even with the settings everyone has suggested, then it took and age to export simple Jpeg files and then it crashed. I was watching my ram monitor above when all this happened and the ram dropped way down to 346meg from available 4 gig... then the entire comp froze and it was a force quit.

                                               

                                              I did a complete shutdown, reboot, re open Lightroom and the same again just slow, and also really slow on the changes to images when editing. this upgrade seems to be far worse so far in performance,

                                              • 20. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                99jon Adobe Community Professional & MVP

                                                Lr Classic is designed to give best performance on systems with multi-core processors and 16Gb of RAM or higher. However I have seen improved performance on a system with 8GB of RAM.

                                                • 21. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                  campbelld84007413 Level 1

                                                  Yeah

                                                  I am using a brand new 2017 27 inch 5K iMac wiht 8 gig ram ( and everything else shut down while using Lightroom)  and yesterday before upgrade Lightroom flew like the wind, it was amazing, upgrade and I have the spinning rainbow wheel over and over, surely one new set of features in masking and luminance and a new from of importing (designed to speed things up) can't kill it that badly ??

                                                  1 person found this helpful
                                                  • 22. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                    e.isin Level 1

                                                    I am running an i7 4.2 Ghz with 32gb of ram. There is absolutely no reason that Lightroom should be as sluggish as it is since I updated. I even have optimized all the settings that everyone has mentioned here and it makes little to no difference. I should have known better than to update before reading about all the bugs and poor performance.

                                                     

                                                    This is unacceptable for Adobe. I am only a student, but I can't imagine the frustration for working professionals.

                                                    2 people found this helpful
                                                    • 23. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                      brente978 Level 1

                                                      Mrjackson - from the creative cloud app there is a drop-down for the app that lets you download previous versions.  You can install the previous version along with the new version, so you can have both versions on the system.

                                                      4 people found this helpful
                                                      • 24. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                        e.isin Level 1

                                                        And I just would like to put this out there. If I wanted to max out the settings and have the machine to handle it, I should be able to. Having to run in circles adjusting all these different settings is ridiculous. I built this machine to allow my workflow to move quickly with the highest settings possible. It's pretty frustrating.

                                                        • 25. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                          knackers_au01 Level 1

                                                          Ive been having slowdown problems for over 12 months now  and after my last escalation to Adobe Tech  support where  I also provided a test catalogue for them to troubleshoot  they told me that these were "known"  issues  and these would  be addressed in the next  major update

                                                           

                                                          And so I eagerly looked forward to this classic release only to find after updating today that NOTHINGS CHANGED!!!!......Its still horribly slow when multiple brushes are used on same image...Can also hear the GPU/CPU fans going mental ....On some images depending on degree of edit tools used I also cant now see real time noise slider  changes ....Lags of 2 secs or more ,,,,Its just terrible .  And there must be a ton of others in same boat as me because nothing strange about my Macbook Pro and Canon 5DSR/Fuji XT20 setup ( MAcbook pro is Mid 2015 model with the highest option upgrades to CPU and RAM  taken out  at time of purchase. )

                                                           

                                                          Whats worse is  I even wiped my macbook pro and installed a fresh new install of OS High Sierra to go with the new lightroom .  ANd then....... I loaded the special test Catalogue I had created and uploaded to  Adobe technical support  when I first had these issues   and sure enough all the problem test images in the catalogue were no different even under the new OS and Lightroom update APP ..And thats a dead give away that none of the issues I had have been addressed in the update...

                                                           

                                                          And I will be interested to see now what excuse they give for the continued slowdowns in the new "Classic"  given I also have a written  response confirming 1. the issues they had seen in my test catalogue were known and 2.w hey would be addressed in next major  update!!!!

                                                           

                                                          Bottom line is for me its time to look seriously at alternatives like capture one etc as I have no confidence in this co that it will  make changes in a timely fashion .. Ive had this problem for 12 months now and Im certainly not going to wait another 12 just to get a normal workflow going....

                                                          4 people found this helpful
                                                          • 26. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                            Jao vdL Adobe Community Professional & MVP

                                                            I don't know why this is slow for you. Switching between images in Develop is almost instantaneous for me on a much older and weaker machine (a 2012 MacBook Pro is what I use) but here are a few observations that might help

                                                            For my workflow, I'll import the images and have 1:1 previews generated at time of import (I use a sidecar XMP).  After I select the images to work on, I'll edit an image and then either sync or copy/paste settings from one image to another.  While Lightroom CC wasn't a speed demon (and seemed to get slower release after release), Lightroom Classic CC seems to pale by comparison.

                                                             

                                                            It also looks like exiting LR Classic CC and restarting it helped a bit as the time has gone down from 4 seconds to 2-3, but still seems slower than LR 2015

                                                            One note is that 1:1 previews do NOT do anything for performance in the Develop module. They are only useful in the Library module for switching between images and zooming in and out to 1:1 in Library. In most cases you do not need 1:1 previews and for performance, I generally recommend people do not generate these and just use standard previews with the preview size on your catalog set to "Auto". Using the new embedded previews option is also a great idea although there is a small disadvantage to this for loading images in Develop (see below). Again, this only helps performance in Library and does not do anything for Develop. It can actually hurt performance a bit as your machine will be chugging along generating 1:1 previews in the background.

                                                             

                                                            Smart previews are only really useful when you do a lot of offline editing of images. They also don't do a thing to speed up your editing if you have your originals available except perhaps if you set the option to use the smart previews for image editing. There is no point in generating smart previews for everything except when your machine is a laptop where you store most of your images on large external storage and want to still be able to edit every one of your images at Starbucks. Smart previews can take a large amount of disk space which if your main disk is a SSD can be expensive and while generating them, the machine is slowed down because of the background task of generating them.

                                                             

                                                            For speeding up loading in Develop, the important factors are the camera Raw cache or whether you converted your originals to dng that has fast load data embedded. Either of those will help loading speed in Develop. Your camera raw cache needs to be large enough to hold enough images (the new 5GB default is generally fine but a bit larger is usually a good idea especially if you have large high res raw files). It is possible that the cache is poisoned somehow and Lightroom is not effectively using it and in that case a good idea is to purge the cache (preference->performance). It will then at first be slow but as the images get loaded in the cache it will get faster to move between images in Develop that you have had in there before. If you convert your images to dng, the dng files will contain the same fast load data that will speed up loading in Develop as is stored in camera raw cache so that can be useful in some cases although I am always wary of losing my original files so I only do that if I have a backup of the nef files.

                                                             

                                                            One remark here is that there is a small disadvantage to using the embedded preview option on import. This can slow down jumping around in Develop if you go straight from import to Develop. What will happen is that many of the images will not have been loaded into the camera raw cache and loading them requires loading the entire raw file right away. This is a subtle effect but can be problematic if you work with high resolution images and like jumping straight into Develop.

                                                             

                                                            Last but not least, on most SSDs it is very problematic to be running over say 75% full. They will slow down terribly. Make sure you are not near that on the disk that contains your camera raw cache and your catalog.

                                                            • 27. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                              dj_paige Level 10

                                                              99jon  wrote

                                                               

                                                              Lr Classic is designed to give best performance on systems with multi-core processors and 16Gb of RAM or higher. However I have seen improved performance on a system with 8GB of RAM.

                                                              Where did you find this information? Can you provide a link?

                                                               

                                                              What does "multi-core" mean? 4 cores? 8 cores? 16 cores?

                                                              • 28. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                99jon Adobe Community Professional & MVP

                                                                Hi paige, 4 core or higher. 16GB of RAM or higher. This is based on testing within the pre-release group. Adobe publishes the minimum requirements. You need to test a trial for yourself as there are many variables. There can even be performance differences between a system with a 1920 x 1080 standard monitor and the resources required to drive more pixels to a 4k monitor or 5k retina display. So no guarantees but I have found Lr Classic definitely more zippy; notably on import. But also in develop. I never see the loading overlay any more. Populating the preview+cached raw data is almost instant, at least on my system.

                                                                 

                                                                Lightroom Classic CC system requirements

                                                                • 29. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                  Jao vdL Adobe Community Professional & MVP

                                                                  dj_paige  wrote

                                                                   

                                                                  99jon   wrote

                                                                   

                                                                  Lr Classic is designed to give best performance on systems with multi-core processors and 16Gb of RAM or higher. However I have seen improved performance on a system with 8GB of RAM.

                                                                  Where did you find this information? Can you provide a link?

                                                                   

                                                                  What does "multi-core" mean? 4 cores? 8 cores? 16 cores?

                                                                  I think this comes from one of the team's stated goals being to fix the performance bug with > 4 core machines with super modern GPUs. This is a long standing issue with LR 6/2015 where people with super beefy machines got horrible performance. I don't think this means it was designed to give best performance on those machines, but simply that you will no longer be punished for having such a machine. Of course having more cores should give you better performance overall.

                                                                  • 30. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                    knackers_au01 Level 1

                                                                    whats even crazier here is Adobe should be having way less issues with Macs than they do with windows given the Macs are limited with just how much you can change on the hardware side of things as against windows desktops and laptops which allow for almost limitless number of different hardware combos including CPU GPU Motherboard combos together with  RAM updates and many different types of Laptop display drivers along with  many different brands of GPU's .etc which in my mind would be a recipe for a slowdown /resource conflict disaster. Yet I hear more slowdown issues lately coming from Mac owners rather than MICROSOFT CUSTOMERS  RUNNING WINDOZE ON THEIR TOSHIBAS, DELLS , ETC ETC

                                                                    • 31. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                      mrjackson Level 1

                                                                      In Preferences>Performance, there is a check box for "Generate Previews in Parallel". What is that?

                                                                      • 32. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                        dj_paige Level 10

                                                                        Jao vdL and 99jon

                                                                         

                                                                        This is good news, but I'd like very much to hear more specifics on this issue, possibly even from Adobe, in an actual post or link to wa web page. I remember when LR 6 was released, the first version which used a GPU, Eric Chan wrote a very detailed description of what the GPU would and would not do. It would be EXTREMELY helpful to hear the details from Adobe, similar to the Eric Chan message regarding the GPU in LR 6.

                                                                         

                                                                        And so it's great that both of you indicate that more than 4 cores will not have a performance penalty as it did in the past for some people, but hearing it from Adobe would certainly be even better and more meaningful.

                                                                         

                                                                        By the way, how many cores in your CPU?

                                                                        • 33. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                          brente978 Level 1

                                                                          "One note is that 1:1 previews do NOT do anything for performance in the Develop module."

                                                                           

                                                                          I will give that Adobe is not 100% clear on this, or perhaps not explicit as to what happens with the Develop module.  From the performance tips below, it seems to imply that only standard and 1:1 previews are used when viewing or working with images, and any other preview settings (embedded, etc) requires processing in the background to automatically generate the 1:1 previews.  For the unclear part, the reference below to using 1:1 previews helping the Library module leaves out what happens with the Develop module - is the Library module just an example, or a special case?  Adobe doesn't say, but it seems like it's just being used as an example (otherwise, when you do a 1:1 zoom, the preview would have to be generated at that time, affecting performance for viewing the image).

                                                                           

                                                                          I am fine with having a slower import time (can step away from the computer) as long as my workflow is optimized, so 1:1 previews seem to be the recommended option to select at the time of import.

                                                                           

                                                                          Adobe doesn't say what happens in the Display module.  The references to "work with photos" below implies the Develop module to me - other than viewing and culling, what real "work" does anyone do in the Library module?  All real photo editing work is done in the Develop module...

                                                                           

                                                                          from here: https://helpx.adobe.com/lightroom/kb/optimize-performance-lightroom.html

                                                                           

                                                                          Lightroom uses previews to display photo thumbnails in the Grid view, the Loupe view, and in the Develop, Slideshow, Print, and Web modules.

                                                                          ...

                                                                          These previews are a 100% view of actual pixels and, like Standard previews, the Camera Raw engine processes them. When Lightroom generates 1:1 previews, it also generates minimal and standard previews, so all three are available to the program as needed. Because so much data is being processed, 1:1 previews can take a significant amount of time to create. Any time you zoom to 1:1 or higher in the Library module, Lightroom uses 1:1 previews.

                                                                           

                                                                          To display and work with photos, Lightroom requires a standard or 1:1 preview, depending on the task. If, upon import, you only tell Lightroom to generate Minimal or Embedded previews, Lightroom creates Standard and 1:1 previews automatically as you’re working in the application. This process hinders performance. To increase your productivity and reduce this disruption, manage when and how you render your 1:1 previews. Render them on import, or set aside time to render them manually.

                                                                           

                                                                          To render 1:1 previews on import, use the File Handling panel of the import window. Choose Render Previews > 1:1. Although generating high-quality, 1:1 previews on import slows the import process, it makes Lightroom more responsive when you start to work in the Library module.

                                                                           

                                                                          An alternative, if you want a speedier import process, is to render minimal or standard previews on import. Then, at any time, select multiple photos in the Grid view of the Library module and choose Library > Previews > Render 1:1 Previews. Let Lightroom process the images before you start to work on them.

                                                                          • 34. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                            Jao vdL Adobe Community Professional & MVP

                                                                            I think the work they are referring to is just culling images. Anytime you touch any develop setting a completely new 1:1 preview has to be generated if you use them so that really slows stuff down. I think that what adobe envisioned is that you import. Then cull looking at 1:1 zoom in Library to check sharpness and only then do anything in develop in the tiny subset of images you selected. Basically think fashion photo shoot. Such a workflow doesn’t work for a lot of other usages of course. I mostly deal with landscape photographers in the few classes I teach and there it really is not appropriate.

                                                                            • 35. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                              brente978 Level 1

                                                                              ok, I can see that perspective - thanks.  Appreciate your insight!

                                                                              • 36. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                                mickspawn Level 1

                                                                                Jao so are you saying i should

                                                                                 

                                                                                1. create 1:1 previews on import (i have not been doing this so i can generate profiles for my older catalogues if necessary)

                                                                                2. cull images at 1:1 in Library module while checking sharpness.

                                                                                3. move into the develop module to work.

                                                                                 

                                                                                Let me ask this... is there a way to generate the develop module previews all in one go?  How ridiculous that the develop module needs different previews than the Library module..

                                                                                 

                                                                                What to do?

                                                                                • 37. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                                  Thib-o Level 1

                                                                                  I have exactly the same slow feeling

                                                                                   

                                                                                  I have just updated to the newest version and regret it so much.

                                                                                   

                                                                                  Importation literally locks lightroom using only 100% of a multicore CPU even with parallel preview render and GPU enabled.

                                                                                   

                                                                                  Application switching to LR takes 4 seconds during importation. Other applications are working perfectly.

                                                                                   

                                                                                  Opening any menu (file, edit, ...) takes the same time, accessing LR preferences takes the same time.

                                                                                   

                                                                                  Hardware: 2,3 GHz Intel Core i7, 16 Go 1600 MHz DDR3, NVIDIA GeForce GT 750M 2048 Mo Intel Iris Pro 1536 Mo

                                                                                  Catalog: ~200 000 pictures

                                                                                   

                                                                                  Previous versions of LR were far more responsive at import time at least.

                                                                                   

                                                                                  Please Adobe developers, fix this dramatic performance issue.

                                                                                  4 people found this helpful
                                                                                  • 38. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                                    Bosphotography Level 1

                                                                                    I'll go back to the previous version. This thing is too slow on my computer it has been painfully slow now. Adobe fix this as soon as possible

                                                                                    1 person found this helpful
                                                                                    • 39. Re: Lightroom Classic CC seems slower than previous Lightroom version it replaced
                                                                                      Romasito Blablah Level 1

                                                                                      Just upgraded to Lighroom Classic CC - and I cannot get into Develop module anymore - the picture is not shown. Checked memory usage it is using 12GB of RAM! So there are some bugs that need ironing out....

                                                                                      1 person found this helpful
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