Yep. At
least in a very non-scientific comparison. A
SPARCstation-IPX running NetBSD feels a lot more responsive than a
Raspberry Pi running Linux. I've run both, but not side-by-side.
Software "weight" probably has a lot to do with it.
Agreed. GNU/Linux likes to be a bit...big.
Memory wise, the kernel isn't /too/ bad, but userspace stuff, both memory and disk
wise, modern
Linux distributions are /terrible/. Even with a barebones Debian installation (7.0,
Wheezy), without
X, X libraries, gcc, locales, and after removing /usr/share/doc, it only trims down to
~600MB. It
can still fit into 1GB, but just barely. By comparison, I once used Slackware on a 40MB
hard drive
without X, and on a 340MB drive with gcc, X, Emacs, and LaTeX, plus room to spare. A 1GB
SCSI drive
just seemed massive back then.
And compare this to a basic V6 distribution with editor (ed), compiler, and kernel
source leaving enough room to work and compile, running on a PDP-11/40 and one RK05,
so it all fit in 2.5MB.