I need to go through 5000 photos from a trip. Speed is key. I need only desktop work, no mobile no cloud, just local hd work, as speedy as it can get. When started with Lightroom I got the impression it's fast enough but now I'm frustrated as it takes forever to see details in photos as everything is being downloaded from the cloud for each edit. I wish I had more control in speeding things up.
Things seem better now that sync has finally completed. I think what happened is that though the originals where available to Lightroom it actually used the copies from the cloud. I gave it all available space and checked to keep copies of all originals and previews locally in local storage settings. And now after it finished the sync it is working again in reasonable speed.