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by ken 2575 days ago
It certainly can. Apple does this in APFS. They call it "fast directory sizing": https://arstechnica.com/gadgets/2017/09/macos-10-13-high-sie...
1 comments

Apple said they would be doing this. For some reason it doesn't seem they actually did it [1].

[1] https://eclecticlight.co/2019/02/06/how-big-is-that-folder-w...