CameraCarl
Member
- Joined
- Feb 3, 2017
- Messages
- 63
- Location
- Minnesota, USA
- Lightroom Experience
- Intermediate
- Lightroom Version
- Lightroom Version Number
- 11.4.1
- Operating System
- macOS 11 Big Sur
I have an old but reasonably powerful iMac. (All its specs are listed below.) I'm running LrC 11.4.1. My catalog has about 290,000 images and the catalog and associated files are on an external 2TB Sandisk SSD. About 600GB of image files are also on this drive.
When I am doing editing of images in the Develop module, the fan on the computer seems to be always running, and edits seem to take awfully long. For example, when I have masked something and move a slider, it can take 1-3 seconds to see the results of the slider having been moved. When I do one mask edit after another, the delays seem to get longer. When I look at the Activity Monitor I can see that Lightroom is taking 100-125% of the CPU. This happens regardless of how many apps are running in the background. I tried quitting everything except LrC and it doesn't seem to make much difference. The image files I work on are typically 50-70MB files with some HDR files reaching 200MB.
I'm looking for any suggestions about how to speed things up. Thank you.
iMac (Retina 5K, 27-inch, 2017)
Big Sur v. 11.6.8
4.2 GHz Quad-Core Intel Core i7
40 GB 2400 MHz DDR4
Radeon Pro 575 4 GB
Model Name: iMac
Model Identifier: iMac18,3
Processor Name: Quad-Core Intel Core i7
Processor Speed: 4.2 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Hyper-Threading Technology: Enabled
Memory: 40 GB
System Firmware Version: 451.140.1.0.0
SMC Version (system): 2.41f2
Mac Hard Drive
500GB SSD
374GB available of 499GB
LrC 11.4.1
Graphics Processor Settings: either AUTO or Use GPU for Image Processing (no difference in response time regardless which setting I use)
Camera RAW Cache 30GB
Video Cache 6 GB
Write xmp sidecar files turned off
Generate Previews in Parallel turned on
Preview cache 22Gb
Standard Preview Size 2880
Preview Quality Low
Discard 1:1 Previews after one week
When I am doing editing of images in the Develop module, the fan on the computer seems to be always running, and edits seem to take awfully long. For example, when I have masked something and move a slider, it can take 1-3 seconds to see the results of the slider having been moved. When I do one mask edit after another, the delays seem to get longer. When I look at the Activity Monitor I can see that Lightroom is taking 100-125% of the CPU. This happens regardless of how many apps are running in the background. I tried quitting everything except LrC and it doesn't seem to make much difference. The image files I work on are typically 50-70MB files with some HDR files reaching 200MB.
I'm looking for any suggestions about how to speed things up. Thank you.
iMac (Retina 5K, 27-inch, 2017)
Big Sur v. 11.6.8
4.2 GHz Quad-Core Intel Core i7
40 GB 2400 MHz DDR4
Radeon Pro 575 4 GB
Model Name: iMac
Model Identifier: iMac18,3
Processor Name: Quad-Core Intel Core i7
Processor Speed: 4.2 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Hyper-Threading Technology: Enabled
Memory: 40 GB
System Firmware Version: 451.140.1.0.0
SMC Version (system): 2.41f2
Mac Hard Drive
500GB SSD
374GB available of 499GB
SanDisk 2TB Extreme Portable SSD V2
- USB 3.2 Gen 2 Type-C connected directly into a Type C port on the iMac
- Up to 1050 MB/s Read Speed
- Up to 1000 MB/s Write Speed
- 1.37TB available of 2TB
- Contains 600GB of image files and 30GB of Lightroom catalog and files
LrC 11.4.1
Graphics Processor Settings: either AUTO or Use GPU for Image Processing (no difference in response time regardless which setting I use)
Camera RAW Cache 30GB
Video Cache 6 GB
Write xmp sidecar files turned off
Generate Previews in Parallel turned on
Preview cache 22Gb
Standard Preview Size 2880
Preview Quality Low
Discard 1:1 Previews after one week