Hi When extracting files from an _uncompressed_ tar file on a btrfs filesystem it would be nice if I could add a --reflink[=never|_auto_|always], like cp has, and the tar command would then "perform a lightweight copy" [1]. For cp it may be easier since the files are referenced as a whole file. With tar the references would be on block level. Maybe the changes could be written faster by an btrfs developer.
There is a btrfs speed test from 2017 [2] where tar is used. Greets Jens Korte [1] https://linux.die.net/man/1/cp [2] https://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs.git/commit/?h=next&id=5c1aab1dd5445ed8bdcdbb575abc1b0d7ee5b2e7
