Switch from one photo to the next takes 20 seconds

Lightroom Classic: Try Unsyncing all synced collections and then delete all images from the "All Synced Photographs" under the Catalog tab.  Don't delete anything in the Cloud Website or you'll permanently lose it.  Quit LR Classic and reopen. Then loook at the Cloud icon upper right and see if it has a checked green dot that says 'Synced."

No try editing in the Develop Module. Mine is fast and works fine now. I think the problem lies in the cloud Sync mechanism.  

Please let me know what information you need to look into this issue. It has not been resolved for me, and continues to make it almost unusable for selecting/sorting through my photos.

The only new performance issues I have are in the Library module, especially with adding photos to target collection (using the "B" shortcut). Other things that are also a bit slow are flagging photos as pick, though that is a delay of seconds, rather than a delay of half a minute for adding photos to target collection.

It seems the filmstrip view just doesn't update in a timely fashion and/or is just held up by some invisible process.

I have top-end hardware and the catalog and lightroom both on separate m.2 SSD's. I did not have these issues with Lightroom version v13.2. My catalog is very large, over 400k images, but I get these issues when working in folders of 1000 images.

I've had Lightroom open "in the background" for a very long time, long enough to have it finish any invisible background processes. (If that takes longer than multiple days, I'd love to see a progress bar.)

Only solution i find is to work on lrc 12..

It's stupid but since the lrc 13 everything lag.

13.3 and 13.3.1 are just agony. No changes from using 13.2, same everything.... no cloud synching. It's gone so slow - in every respect - that it's unusable. Looked up some suggestions for speeding it up and some "expert" said turn off writing metadata automatically. I did and wished I hadn't because when you turn it back on (as it is easy to forget to do it manually) it re-writes the metadata for the whole database (120,000+ photos), which makes it even more frustrating!!! Not sure I can live with it much longer. Adobe has to say something about this and fix it..... quickly!!

The solution in a similar thread was to disable the antivirus software. If possible, only on the Lightroom catalog and the cache and preview folders.
It is unclear to me why it should have been so much better with 13.2. But it's worth a try.

P.S.: I would never have called any version a rocketship 🙂 12 cores, 96 GB, 2 x m2-drives (pci4), rtx 4060

I am still having the same issue. I posted about this earlier in a thread called "Long delays when interacting with images in Library module" where it was also mentioned that it might need to do some housekeeping first. It's been open plenty long since then, and I'm still often getting delays of up to half a minute when adding photos to target collection with the "B" shortcut.

I've never had this happen like this on v13.2.

Same problem here. Just started working on some baseball shots, and Develop module is horribly slow to perform updates.

Lightroom 13.3.1 waaaaay too slow. What happen, from previous version to this new one, with no settings changes, same catalogs, same computer, same OS (Sonoma 14.5), same everything, all the suggestions here are applied, no syncs, no difference from before and now is just too slow. needs to be fixed !

One thing that might explain this is that if you sync a lot of images to the cloud that the update to 13.3 changed the sync mechanism. They did a complete overhaul (long overdue). This triggers a comlete reevaluation of the sync data between local and cloud and can take from 30 minutes to many hours to complete. While it is doing this, your computer will react quite slowly but this should be over when it is done doing this. During this process you won't see any feedback that it is doing this - no spinning arrows or somesuch - but it is doing it in the background. So this might explain why after first opening Classic after the update it is quite slow. Of course this explanation only works if you actually sycn from classic to and from the cloud.

It was totally slow for me too. Exports sometimes took 10 minutes before the progress bar even appeared. I noticed that the processor load was always around 10 to 20 % for maybe 2 days. The funny thing is that it worked right after the update to 13.3. It was only after about 2 days that Lightroom became virtually unusable. But now it's almost ok again. It seems to me that Lightroom did some clean-up work in the background after the update, which took 1 to 2 days. That would explain the constant processor load. Now Lightroom is usually at 0% load when I'm not doing anything... So my tip is to just wait a little longer, maybe let Lightroom run overnight.

I have about 90,000 photos in Lightroom, on Windows with 64 GB RAM.

Best regards

Friedemann