Does osxphotos export require twice the storage?

This is not a bug, just a simple question: When exporting onto the Mac's internal drive with Photos set to "Download Originals", will that export take up the same amount of storage as the original photos? So for example if my Photos Library is 100G, do I need 200G total after the export? Or does it leverage copy-on-write and cloning? Here's the export command I'd be using: ```bash osxphotos export \ --library ~/Pictures/Photos\ Library.photoslibrary \ --shared-library \ --in-album \ --directory "{folder_album}" \ --filename "{original_name}" \ --skip-original-if-edited \ --edited-suffix "" \ --jpeg-ext jpg \ --download-missing \ --sidecar XMP \ --update \ <DESTINATION> ```