alt Hacker NewsIn the olden days we called that a "RAM Disk" and it made our Atari STs go really fast!
On the old Amstrad PCWs that were everywhere at least in the UK in the mid 80s to mid 90s you could have up to 512kB of RAM, a fair chunk of which could be a RAM disk. This made compiling stuff in Turbo Pascal really fast too :-)
Except swap is, like, opposite of RAM disk.
That said, still an nice and fun concept. Though caching got better since I assume :)