My first article on Lightroom was: Lightroom: Slow As Molasses Or Lightning Fast?.
I did some further testing with actual numbers: What’s Lightroom’s speed when browsing the same 100 photos of the same catalog with all these photos after having generated the 1:1 preview:
|Library @ fit setting||1 mn 42s||0%|
|Library @ fill setting||1 mn 45s||3%|
|Library @ 1:1 setting||3 mn 53s||129%|
|Develop @ fit setting||5 mn 11s||205%|
|Develop @ fill setting||5 mn 12s||206%|
|Develop @ 1:1 setting||6 mn 04s||257%|
- Browse the catalog in the library module.
- Generate the 1:1 previews during the import.
If I didn’t generate the 1:1 previews during the import, or would have deleted the 1:1 previews, browsing at the fill setting and/or the 1:1 preview setting would have been about 5 times slower.