WORLDTMP on a ram disk

[Kimmo Paasiala]

Poking around the /usr/src/Makefile.inc1 I see that there's a variable
called "WORLDTMP" that seems to set the location for temporary files
during the world build. My question is now:

Is it safe to put WORLDTMP on a ram disk, for example tmpfs(5)?

Looking at the build process it seems to me that the temporary files
are no longer needed after make buildworld has finished?

-Kimmo