Virtual Memory Filesystem (?)

[Guy Harris]

> Another 'feature' is that commands like
> 	cp humongeous-file /dev/null
> will take 0 seconds.

Almost:

	Script started on Fri May  6 11:49:27 1988
	gorodish$ cat /etc/motd
	SunOS Release 4.0 (GORODISH) #267: Thu May 5 14:49:36 PDT 1988
	gorodish$ time cp /vmunix /dev/null

	real	0m0.13s
	user	0m0.03s
	sys	0m0.08s

You *do* have to spend some time starting up the program, opening the file,
"mmap"ping the pages, etc..