zstd performance is great on really old and weak CPUs, at its default compression level. I recently tested it with a whole system file tree on a 2005 vintage Pe

zstd performance is great on really old and weak CPUs, at its default compression level. I recently tested it with a whole system file tree on a 2005 vintage Pentium M single core (thinkpad x41 tablet) running a bare bones debian install, and was pleasantly surprised.