Lightroom Classic: Very slow rendering in Develop module

[dave22039444ywc2]

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

[Victoria Bampton LR Queen]

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.

[karlisk54281377]

@Victoria - you're kidding! That couldn't be a final situation. It sucks my whole editing process all the time!

[Victoria Bampton LR Queen]

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.

[karlisk54281377]

Damn. I also use a 4K screen :-(

So for what are the (1:1) previews?

[Victoria Bampton LR Queen]

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.

[karlisk54281377]

Any other suggestions to get a smooth workflow in the development module?

[Victoria Bampton LR Queen]

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.

[J453]

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.

[karlisk54281377]

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?

[Victoria Bampton LR Queen]

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?

[karlisk54281377]

Hm :-(

The working with sliders are fine... but the time till the image is load completely and fully sharp takes sometimes 1-2 seconds. I think it's to long for this highperformance hardware and the "little" raws (nef) from my nikon d750's

And the performance from the export to jpeg files are also very sloooow (compared against CaptureOne Pro 8).

[Victoria Bampton LR Queen]

Part of the loading time will depend on what you've already applied to the photos, perhaps as defaults or presets. Things like lens corrections, noise reduction, anything that builds a mask like highlights and shadows, dehaze, local adjustments, etc. can extend loading times. Are the photos at Adobe's defaults when they're taking 1-2 seconds, or with some settings applied?

For export, again, we need timings for comparison against known averages. You can 'turbo-charge' exports by splitting the export in a couple of batches and run them concurrently.

[karlisk54281377]

Also without any editing presets (default settings) the images where displayed first for a very quick moment with flat colors, then with the "right" colors but pixled and at the end fully sharp – this takes maybe 2-3 seconds.

JPEG-Export in C1 takes a quarter or less as in LR 😞

[karlisk54281377]

Here are a sample real time screen capture: https://www.dropbox.com/s/8uxa2icy0xj...

Is this the usual "speed" of lightroom? By the way: i work with a NEC 4K 32" display...

[i_g_okorji]

Karlis, if you are using the Wacom tablet, uninstall it completely. Alternatively, un-plug the tablet and back after after disabling some setting in the preference file. I do not remember the actual setting (not the GP alone). You may contact the online live help/assistance for details.

[karlisk54281377]

nope... no difference with or without the wacom driver!

[i_g_okorji]

Which OSX are you running? If you are on any of the last upgrades, then that's the culprit.I am on 10.9.5 and my system is 2007, yet no issues with LR CC after resolving the Wacom problem.
Heck! only if I could remember which of the preferences that I disabled, unplugged the Wacom and back; afterward I am laughing all the way. Try the help desk again and it is free.

[karlisk54281377]

I'm on El Capitan. You're realy on 2007? Okay... i think we have different perspectives of "performance" 😉

[i_g_okorji]

Yes 2007, Does that sound strange? LR even the CC version is not a resource intensive app and you certainly don't need an 8-core system to get moving just fast.
Actually, what's the hurry? On a side note the El Capitan and its predecessor are not graphic friendly; some videographers and photographers running the state of the art Mac hardware have all downgraded to v 10.9. You may consider that option and put your blame on LR CC elsewhere, perhaps.

[FeedbackCommunityMember]

Reading this 12 months on and nothing has changed. Lr CC is imo still unusable. I plough through my weddings screaming at every single picture. I am also amazed that this has been released. I cannot wait until my quiet period so I can get this dinosaur out of my work process. http://www.simongrahamphotography.com/adobe-lightroom-is-a-bloated-overweight-monster-that-is-costin...

[nzjoel]

Turning this off SIGNIFICANTLY improved the performance of moving between photos in develop mode. Thank you!

[Danie Bester]

I've had it with slow Lightroom CC and all the other issues like error reporting like "The image Appears to be Damaged". My PC might not be brand new, but with a Core I-7 CPU and 12 GB of Ram, the lag time is getting to me.

[FeedbackCommunityMember]

I'm having the same issues. LR just cannot handle large files in develop without bogging down completely. Turning off the GPU has no effect either. I have 32GB of RAM and a good graphics card so this should not be an issue. Very frustrating. LR was better in previous versions.

[J453]

Hi Simon, It may help if we had your system info. Can you launch Lightroom and select Help > System Info... and copy paste the contents of that dialog in a reply?

[FeedbackCommunityMember]

I fixed the "LR is ridiculously slow" problem by disabling all plugins in File --> Plugin Manager. I was having the same problem waiting up to 10 seconds for previews to display on a super super powerful desktop.