I have same issue qith LR performance.
Interesting fact is that I'm using the same camera, same filesizes and similar presets and in the past I didn't have any of those problems. Lightroom was working smoothly. With each new version is getting worse. Now I'm having problems when viewing photos in library. going from one photo to another takes 1-2 seconds. I've never had this problem in the past.
I think they will do nothing until they loose 50% of the users. I'm already trying new tools which works perfectly fine with the same files. Or I will try to run old version of LR one that wasn't BROKEN 😉
This is a Specific Computer Problem. Whether or not you are using a Mac or Win PC.
It is not true for all Macs or Win PCs.
What is causing it No One Knows. If they (Adobe) did they would Fix it.
I'm using mac so explain to me how it is my macs fault when nothing was changed on it. Hardware is the same even mac os version was the same (i thought that was an issue but I've made an update but it didn't help) my camera is the same and runs on the same settings. The only one thing which is different is version of the lightroom.
so explain to me how it is my macs fault when nothing was changed on it
I can't and Neither can Adobe. That was what I was trying to express to you.
That is why I said NO ONE KNOWS.
I Just installed LR version 9.0 and guess what. It works great with pictures from the same session no lag in both library and develop modules.
Yes that is the other solution I should have mentioned. Hopefully Adobe fixes this bug in LRC 10.2. It's annoying that this bug hits people that actually do the right thing and calibrate their displays.
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There is a known bug in the current Lightroom Classic version on the latest Mac OS X versions when using certain calibrated display profiles (not all trigger this). It will slow down browsing in library enormously. Try selecting the system default display profile in your system preferences and see if it makes a difference. Reverting to Classic 10.0 should fix it for now I understand. For some reason I don't have the problem with my display profile but lots of people have it and it was acknowledged by Adobe.