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Originally Posted by Lt Major Burns  i'm just curious to see how a 1.3gb psd would fare in coverflow. will i get spinny beachball hell? |
Nope. The spotlight / metadata file system creates preview images of all files as they are written. This means if you save a 100 slide Keynote presentation, it'll process in the background just after saving and store all 100 slides as fairly-low-resolution preview images in the metadata system.
When you open it in Finder, you can flip through these pages in the finder preview instantly.
Because the previews are stored using PDF, 1000 page word documents might only use a couple of kilobytes of metadata to store a pretty-good quality preview.
The system that Apple have implemented is pretty impressive, and I think it'll make 10.5 a must-do upgrade.