However, it could be even faster if it used the clonefile(2) syscall on macOS. This is instantaneous and creates a copy-on-write file backed by the same filesystem blocks as the original. For copies that do not cross onto different filesystems / devices, this is effectively identical to a manual copy, while being O(1) instead of O(n).
fcpis an awesome project, and amazingly fast.However, it could be even faster if it used the
clonefile(2)syscall on macOS. This is instantaneous and creates a copy-on-write file backed by the same filesystem blocks as the original. For copies that do not cross onto different filesystems / devices, this is effectively identical to a manual copy, while beingO(1)instead ofO(n).Rendered man page here: https://www.manpagez.com/man/2/clonefile/ Raw man page here: https://opensource.apple.com/source/xnu/xnu-3789.21.4/bsd/man/man2/clonefile.2.auto.html