More details on APFS


Ars Technica on iOS 10.3 in general, but particularly the new Apple File System:

Rumor sites covering the iOS 10.3 betas usually do some hand-waving here, claiming that APFS may be faster or save disk space. I can't speak to the filesystem's speed except to say that boot times on three devices I tested under iOS 10.2.1 and iOS 3 beta 7 (a late build that, bug fixes aside, should be more-or-less identical to today's release build) were the same. But iDevices with iOS 10.3 installed do consistently seem to show larger amounts of space available, as well as larger capacities, suggesting that the conversion to APFS is reducing the size needed for the OS partition.

The difference isn't huge, but does seem to free up some storage space.