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dave22039444ywc2
Participant
April 26, 2015

Lightroom Classic: Very slow rendering in Develop module

  • April 26, 2015
  • 75 replies
  • 1207 views
hi folks,just installed LR CC. Rendering in develop module is really slow. Eg. when I move between photos, it takes a good 3 seconds for the photo to fully render. Displays "loading" for about 2 seconds and then a further second or two before the image is fully rendered.This isn't happening in the Loupe view.This is with a new set of photos I just imported, and I had "build 1:1 previews" set during import.Is this an issue or have I got a setting wrong somewhere?It wasn't quite this bad on LR 5.ThanksDave

    75 replies

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    Victoria Bampton LR Queen
    Community Expert
    Victoria Bampton LR QueenCommunity Expert
    Community Expert
    November 20, 2015
    I wish I could tell you that!

    What specifically is 'poor'? How long does it take to load an image in Develop? To sliders-available stage? And to fully sharp stage? From what camera? What file format?

    And compared against what? Compared against an earlier Lr version?
    Victoria - The Lightroom Queen
    K
    karlisk54281377
    Participating Frequently
    November 20, 2015
    Thank you for your suggestions but...

    1. my cache is set to 25 GB
    2. the standard-previes are alway rendered
    3. the original photos are on my internal flash drive
    4. if i disable the gpu the editing permance is horrible
    5. i work with one of the fastest machines: a 8-core mac pro with a AMD FirePro D700 6GB VRAM, 64GB RAM, 1TB internal Flash

    And the performance of Lighroom is still poor. Tell me please, whats going wrong?
    J
    J453
    Legend
    November 20, 2015
    These may not be completely satisfying answers but you could disable using the Graphics Processor in the preferences and restart LR and bypass the card. Upgrading hardware with a faster channel to the GPU (and a faster GPU) is another option.
    Victoria Bampton LR Queen
    Community Expert
    Victoria Bampton LR QueenCommunity Expert
    Community Expert
    November 20, 2015
    Enlarging the camera raw cache can help (in Preferences). It doesn't need to be too big.

    Preloading the camera raw cache by rendering standard sized previews can help.

    And keeping the original photos on a fast drive will make a good difference.
    Victoria - The Lightroom Queen
    K
    karlisk54281377
    Participating Frequently
    November 19, 2015
    Any other suggestions to get a smooth workflow in the development module?
    Victoria Bampton LR Queen
    Community Expert
    Victoria Bampton LR QueenCommunity Expert
    Community Expert
    November 19, 2015
    1:1 Previews are primarily used for checking focus in the Library module. If you don't need to zoom in the Library module, Standard size will do you fine.
    Victoria - The Lightroom Queen
    K
    karlisk54281377
    Participating Frequently
    November 19, 2015
    Damn. I also use a 4K screen :-(

    So for what are the (1:1) previews?
    Victoria Bampton LR Queen
    Community Expert
    Victoria Bampton LR QueenCommunity Expert
    Community Expert
    November 19, 2015
    I'd love to say I was kidding, but everything in life is a trade-off. I hope they'll be able to optimize it further over time. If you're not using a 4k/5k screen, you might be better with it off.
    Victoria - The Lightroom Queen
    K
    karlisk54281377
    Participating Frequently
    November 19, 2015
    @Victoria - you're kidding! That couldn't be a final situation. It sucks my whole editing process all the time!
    Victoria Bampton LR Queen
    Community Expert
    Victoria Bampton LR QueenCommunity Expert
    Community Expert
    November 19, 2015
    Karlis, there's an extra overhead in passing the data from the CPU to the GPU, which is why loading is slower with it enabled. It's a case of picking which is more important to you - loading speed or interactive speed. Rendered 1:1 previews won't help in the Develop module.
    Victoria - The Lightroom Queen
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