ACR Unusably Slow

[PhotogCda]

Microsoft Surface Book II,16GB of RAM, Core i7 8650U processor, NVidia GTX 1060 w/ 6GB of RAM, Windows 10 Pro. Graphics acceleration is turned on. The Camera Raw cache is set to 5GB. GPU driver updates are applied as released. 

Whenever I try to open RAW file in ACR, it is unbearably, unusably slow. I can work on the same file in Lr and it's fine. Working on multi-gigabyte PSD/PSB files in Ps is fine, too. The ACR filter in Ps is fine, as would be expected. in ACR, moving any of the sliders is halting and completely unsmooth. Making a fine adjustment with the sliders is impossible. When I try to move a slider, there's a delay of 5-10 seconds before the slider actually moves and I can see the extent of the adjustment. I have to wait 30-40 seconds, sometimes longer for the adjustment to be reflected in the image. 

The laptop isn't a speed demon, it's no antique either. It's a decently spec'd machine. 

What could be causing this extreme slowness in ACR?

Thanks.

[JP Hess]

What version of Camera Raw are you using?

[PhotogCda]

Most current. It gets updated when Adobe releases a new version via CC.

[PhotogCda]

Nobody has thoughts on this?

[TheDigitalDog]

My thoughts are, you may need a better/faster GPU. 

[PhotogCda]

Hi Andrew,

While the 1060 isn't the most current GPU available, it's no slouch either. And having just one file open in ACR shouldn't take up that much resource. There are no issues in Lr and I can work on multi-layered (>100), multi-GB size files in Ps without any problem. 

[JP Hess]

I'm using an eight year old HP Pavilion desktop computer with 8 GB RAM, no graphics card, just onboard graphics. A few things in Camera Raw 12.4 are a little slow on my computer. The only suggestion I can make to you is to try disabling the GPU option and see if that makes any difference. Some users have complained that the latest Camera Raw is slow while others with up to date high performance computers report that it performs extremely well.

[PhotogCda]

Thanks, Jim. GPU acceleration on, or off makes not one bit of difference. 

[Ramigrafx]

Window 10 pro fully up to date.
ASRock X399 Phantom Gaming 6 
AMD Ryzen Threadripper 1900X 8-Core Processor
Ram 64GB
U28E850 on NVIDIA GeForce RTX 2060

Same problem in ACR particularly the new colour gradient tool.

Had similar problem a year ago on a different pc and that turned out to be ransomeware protection in Acronis TrueImage. When turned off this resolved the problem.

No problem at all in the Develope module in Lightroom

[PhotogCda]

Ah, that's useful information. Thank you. I am using TrueImage. I'll try turning off the ransomware protection and see what happens. Funny that Acronis views Adobe as ransomware. 

[PhotogCda]

Seems TrueImage may have been the problem. I added the Adobe program folder to the monitoring exclusion list and ACR is working as it should.