-o log considered "quite nice" for VAXen?

[David Brownlee <abs%absd.org@localhost>]

While extracting netbsd-6 onto a MicroVAX 4000/90 I thought I'd run
some quick tests on WAPBL (-o log) to see what difference it made.

Rather unscientific, just two extracts from a file mounted across NFS:

# mount -o log /dev/sd0a /mnt; cd /mnt
# time tar xzpf /opt/netbsd/arch/6-vax-2012-04-26/base.tgz ; time tar
xzpf /opt/netbsd/arch/6-vax-2012-04-26/base.tgz
      202.63 real        62.18 user       102.58 sys
      198.09 real        60.84 user       102.41 sys

# umount /mnt
# mount /dev/sd0a /mnt; cd /mnt
# time tar xzpf /opt/netbsd/arch/6-vax-2012-04-26/base.tgz ; time tar
xzpf /opt/netbsd/arch/6-vax-2012-04-26/base.tgz
      309.41 real        60.50 user       105.47 sys
      317.80 real        59.60 user       105.85 sys

Not too shabby, though the (relatively) fast CPU could be a factor.

Also tested extracting .txz format files. Now *that* is slow on the 4000/90.
I hate to think what it would be like on an older vax!