Re:macOS command-line tools you might not know about
by chlorion on Tuesday June 27, 2023 @08:56PM
(#36500885)
GNU cat will use the copy_file_range syscall when possible!
copy_file_range allows a user land program to copy data between two files without doing any user space work. Instead of reading data into a buffer and writing it back out to the destination, the kernel will somehow manage to move the data for you.
I think this will prevent any extra copies from occurring in situations where it can be used.
copy_file_range allows a user land program to copy data between two files without doing any user space work. Instead of reading data into a buffer and writing it back out to the destination, the kernel will somehow manage to move the data for you.
I think this will prevent any extra copies from occurring in situations where it can be used.
https://man.archlinux.org/man/copy_file_range.2
https://git.savannah.gnu.org/cgit/coreutils.git/tree/src/cat...