P: Slow UI when using Mac and Custom Display Profile

Hi Rikk,

macOS Catalina 10.15.7

Retina 5K, 27-inch, Late 2014

3.5 GHz Quad-Core Intel Core i5

32 GB 1600 MHz DDR3

AMD Radeon R9 M29OX 2 GB

Just adding my similar experience to this thread.  In Develop module, I can move right along for about 10-15 minutes and then the cursor starts to freeze up and changes are first very slow, then impossible.  And then the grey blocks appear.  Tried various solutions suggested in this thread to no avail.  Will revert to earlier version of LRC. 

*Mayuri Jain  @Rikk  Switching to the sRGB profile fixed the insanely slow scrolling in the library view, but of course the colors are wrong. Thanks for the temporary fix! 

2020 8-core 3.8GHz 32GB iMac with Radeon 5500XT 8GB LR 10.1.

If you system is behaving as described in the Official Post on this thread, no need to start a new thread or provide any information. 

If you system behaves differently, then you should start a new thread with complete information.

Review the official post on Page 1 to determine how to proceed. 

@8510810 I received the following message from Victoria Bampton:  "I've merged your reply into the original post. To reply, use the Comment on this post here... box at the bottom of the page rather than starting a new thread."

I must have accidentally started a new thread. Do you want my system information?

@BrianKimball 

Interesting. I might try DisplayCal...

I have experienced the slowdown and also on the same computer with the same monitor after having another monitor on not having a slowdown. And, then putting the old monitor back with the same profile as before and not having the slowdown, recalibrating and new profile with the same software and again not having a slowdown. I am totally baffled by what happened but I am pretty sure it is not the profile.

Right and I've never experienced the profile-related slowdowns with Spectraview but some have. It's a combination of additional factors. 

No, I've never experienced the profile-related slowdowns.  I've always used DisplayCAL and my installation of Lightroom Classic 10.0 and later 10.1 run as fast as they do with the sRGB monitor profile.

I actually had hoped switching to sRGB would magically make my Classic speedy again.  Sadly, my own performance issues are of the more mundane variety- those baked into the software architecture of Lightroom Classic.

I'd be hard pressed to believe it's the profile software for the display only because, I sent a profile from my end, where I have absolutely no issues (SpectraView/MacBook Pro) to someone who was having issues and that profile didn't fix his problem. There's something about the sRGB profile or how it's used that seems to fix this issue. I mean it can't hurt to try a different product but I'd be shocked if one product worked and another didn't, all settings (like V2 spec) being the same. 

@BrianKimball 

Thanks for the suggestion, are you experiencing any slow down with profiles from these software?