Save Large Photoshop Files Faster

From Macworld
If you work with large Photoshop files, you’re probably well aware of how slowly they save. Much of that time is spent flattening your image in order to create the preview icon you see in the Finder. While useful to have, you probably don’t need to see a preview icon for every interim version of your image. By disabling preview icon generation on save, Photoshop will save your work much more quickly. You can change how Photoshop works permanently via its preferences, or just on a save-by-save basis.

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