4 Replies Latest reply on Jan 12, 2017 4:37 PM by Anna Kucera

    Lightroom extremely slow


      I've read through all the posts here with the same complaint of performance problem and tried everything that's in them with absolutely no change. At this point LR is nearly unusably slow and seems to be getting worse over the last year instead of better. I'm getting ready to start looking at alternatives because there seems to be no relief in sight.


      I'm running on a late 2014 Retina 5K iMac

      Mac OS Sierra 10.12.1

      4GH Core i7 Processor

      32GB RAM

      Internal SSD for catalog and previews and external Thunderbolt drive for RAW master files

      AMD Radeon R9 M295X 4GB Graphics Card

      Lightroom CC CC 2015.7

      Primary images are uncompressed RAW from a Nikon D810 and some from a D500


      Examples of slow performance:

      - Select an individual image from the previews across the bottom. It takes 4-5 seconds (or more) for the image to load in full resolution on the screen

      - Tap Z to zoom for 1:1 takes 5 or more seconds depending on the image


      These are just a few examples of the slow performance but there are all kinds of stutters when shuttling through the thumbnails of photos in an individual folder or selecting tools or previews throughout. I've been using the same camera and computer for the last 2 years and when I got them both the performance of the solution was great. All of this performance problems have been introduced int he last 12 months and I have absolutely no performance problems with any other application that I use from any other provider; this is isolated to Lightroom. Over the last 12 months, using the exact same photos but successive updates to LR the performance just keeps declining more and more to the point where I'm just losing my patience to continue dealing with it. I can't have software that gets worse to use over time instead of better, especially at the price I'm paying for it. ! I'm ready to evaluate alternatives unless I see a real commitment to actually fix the seemingly almost universal complaint about LR.

        • 1. Re: Lightroom extremely slow
          dj_paige Level 9

          As an experiment, turn off the GPU acceleration in Lightroom and see if this improves. (Go to Preferences, click on the Performance tab, then uncheck the box).


          Also, please let us know if you are doing a lot of brusing and/or a lot of spot healing on your photos.


          Also, please state the EXACT make and model of your CPU.

          • 2. Re: Lightroom extremely slow
            donsullivan Level 1

            As noted above, I've already tried turning off GPU acceleration a number of times per other questions on this site and so far I've seen no measurable change in performance. I am occasionally doing some spot healing (10-15 per photo max for things like sensor dust in skies of random tree branches on the edge of a frame) and definitely doing some brushing. However, the performance problems for just general rending of an image is happening even on photos that have not been touched in any way in the Develop module.


            A little hard to find the 'exact' processor data since Apple doesn't expose the model number easily but from that I can find it's a Haswell, Quad Core 4.0GHz Core i7, Intel 4790K processor

            • 3. Re: Lightroom extremely slow
              dj_paige Level 9

              As an experiment, please create a new catalog, put a dozen or so photos in there (not important photos, though) and then edit the photos but DO NOT do any spot healing or brushing on the photos. Is the performance acceptable? Then continue to edit the photos with the usual amount of spot healing and brushing. Is the performance worse?

              • 4. Re: Lightroom extremely slow
                Anna Kucera

                Turning off turning off GPU  makes it slower for me