joyent creates new filesystem for illumos

Yesterday estibi posted a link on irc:
https://github.com/joyent/illumos-joyent/blob/master/usr/src/uts/common/fs/hyprlofs/hyprlofs_vfsops.c#L25
It points to a new filesystem for illumos, a hybrid between lofs (for mounting iso images and other virtual media  filesystem that allows you to make a subtree of one filesystem appear in another -- e.g. in the case of readonly mounts of /usr and /lib into zones - thnx Joshua for correcting me) and tmpfs (in RAM filesystem). Source code explains:

The purpose is to create a high performance name space for files on which

 applications will compute.

 I'm waiting eagerly for joyent to further explain and post example use. You rock, guys!