Starting off with the most up to date system info post:
The summary of the problem is basically laggy / insufferably slow performance issues with LR CC running on a system as follows:
- i7 4790k @ 4Ghz
- 32Gb RAM
- SSD Catalog
- 2x HGST 5Tb RAID 1 image host drives
- nVidia 970 GTX
- 2560 x 1440 display, LR in Single Display mode only
- Windows 10 Pro 64bit
I have been engaged with Adobe on this issue for several months, during which time I have kept my display drivers and lightroom up to date.
Performance *HAS* improved slightly since 6.10 but is still not at a point where it is comfortable to smoothly work. Every operation has a lag / UI update that just makes the whole experience jarring. The memory leak that would send LR to its knees was indeed resolved with 6.10, so performance no longer degrades as rapidly over time as it used to, however baseline performance is still not what I'd expect and is certainly not comfortable to work with. Editing in Lightroom is a headache to be dreaded right now, so much so that I've been putting off jobs that I really shouldn't be.
This initial video opened up the dialog with Adobe, and was recorded on 6.8. This is the best performance I ever see from LR as it was freshly loaded up and hadn't been subject to the memory leak in versions < 6.10 . I'm currently regenerating the 1:1 previews on the images in the video to see if the cache was corrupted or something. It's taken 2 hours so far, and it's at 58%. (700 images). In another 2 hours I will be able to say.
I've produced another video that shows the GPU accel colour shift and screen blackout. This time LR had been open for a few hours, so it's the absolute worst case performance. Running on 6.8 / 6.9 as 6.10 had not yet been released
Another video, this time with some diagnostic information onscreen. It's a long video as I was discussing with a reddit group ideas on how to improve performance. Skip through and you'll find CPU readouts, HDD benchmarks and some other stuff. This was recorded during a 1:1 preview generation session, which took 3 hours for 1000 images.
I've had lightroom open long enough to import 286 images and generate 1:1 previews for them. Performance is still just as bad as in the recorded videos. I'll leave it open and idling overnight to see if it leaks any memory, but honestly the concept of editing even this tiny set of ~300 images is enough to give me a headache.
Face tagging, geotagging, and all other extraneous gubbins turned off from day 1. 1:1 and Smart previews. 90% CPU over 4 cores, but no account given, seemingly, to people trying to use LR while an import is in progress. Its borderline unusable as it is (As I demonstrated in my videos) but during import - no chance. I normally leave it on overnight importing images, but this was a rush job. Rush. Hah.
At this point I was tempted to revert back to 5.7 as , although not exactly a greased sow in terms of performance, it is certainly less cumbersome than CC.