DEVFS in a chroot?

[M. Warner Losh]

In message: <5473.1083327210 at critter.freebsd.dk>
            "Poul-Henning Kamp" <phk at phk.freebsd.dk> writes:
: >Should I mount /var/chroot/dev as type devfs?
: 
: Yes:
: 
: 	mount -t devfs randomargument	/var/chroot/dev

What if I have hundreds of these chroots?  We build our product inside
a chroot right now and I'm worried what the overhead of
mounting/unmounting this for every build would be...

Warner