memory instead of a permanent swapfile?
Definitely. No matter how many times you wipe the swapfile, it is still possible to recover the over-written data, if enough effort is put into it. Whereas, using the RAM memory ensures that nothing is written to disk at all. This totally circumvents this problem because once the computer is switched off all data in RAM memory is lost forever. It also has the merit of safe crash close if you are raided. Of course, these advantages apply to encrypting the swapfile with BestCrypt.