Lightroom Classic: Very slow rendering in Develop module

Hey Adobe,

why is the perfomance in the develop mode still so poor when i switch from one image to the next?

When i disable the gpu support it's so much faster but then the editing himself is arkward slow. I've still rendered the 1:1 previews and i work on a fully equiped 8-core Mac Pro (Late 2013).

So what's going wrong? This kind of "working" sucks!

Lightroom cc latest release is unusable.
i7 with geoforce gt690 card and 32 gbyte of ram. Runs like a crippled snail.
Have updated wacom driver, updated Nvidia driver, disabled and enabled GOU and deleted and replaced preferences files. Still no improvement.
Have reverted to LR 6 standalone which fabsolutely flies.

Worst release ever by adobe.

Greeting all. First off thanks for writing about your experiences. Nice to find others having similar issues and what they have tried...

I am in the midst of a major LR CC slow down dilemma as well. Wanted to hear your thoughts.

So, I just recently upgraded my whole system from an older XPS desktop slower 3.4 Ghz CPU, 8Gbs RAM, windows 7 and a standard def 24" dell monitor).

New Sys:
Windows 8.1
Core i7 - 4970 3.6 Ghz
16Gb Ram

GPU
Nvidia GeForce 750 Ti
Ded Mem - 2Gb DDR5

New Monitor BenQ 32 UHD

On paper this should blow my old system away.

That said, doing tasks that used to be quickly executed have been very slow. Anything having to do with changing image settings (exposure, contrast, shadow...) is painfully slower than in my old sys. I have been rendering standard previews... then tried 1:1. Preview rendering is VERY slow now which I now understand better since it is building huge previews for this screen to the tune of 3840 pixels.

With all my performance gadgets open I have been trying to see how different functions in LR affected load on the GPU and CPU. I did also bounce back and forth trying the GPU accelerator feature but that doesn't seem to have any benefit (at least none that I can see). The only thing I did notice is that when that option is not checked that my 8 cores tack out a lot more when working however, the GPU monitor does not show any major ramp up of load when it is checked. I would assume that should be working harder if the cores are not.

After messing a around a while my suspicion is that maybe something (LR itself or the system) has to do too much work to feed this monster monitor with updated re-rendered previews. To support this I changed my screen rez to 1080 and see an immediate difference in response time and performance.

I wish I had a higher end video card to see if just swapping that out kills this issue for me.

Thoughts??

Wow, thanks for the suggestion---no I haven't tried this. Yesterday I couldn't get it to open at all! So I tried signing out and then back in, to the CC app. So far so good. But I've book marked that link you posted just in case...

Have you tried restoring your prefs and then relaunch Lightroom? http://blogs.adobe.com/lightroomjourn...

I'm in LR CC 2.1---not the same LR dependability from my LR 3 and 4 days. Way too many hangs, mouse works on somethings, sometimes and not on others. Long times loading images---sometimes. Always crashes or hangs upon reopening. BUH!

I have LR 6.1.1, GPU support off, SSD drives, 16GB of memory, rendered 1:1 previews and swiching from one photo to another and back takes seconds to display sharp image in Develop module on Intel i7-3770K running 4.5GHz. This is unacceptable behavior, when 1:1 preview is available - it MUST be displayed in a fraction of second! Thank you for solving this simply bug!

Great news, thanks for the update

You are right, the Wacom was the problem. I've installed a new driver and the crop tool appears to come back to normality. Thanks and you've saved Adobe one customer.

I've just tried to examine the Wacom tablet preference and noticed that I'm required to reinstall the software in my system is incompatible. A reinstallation of the original software is required. I'll try to do so now.