PFS is by far the fastest, especially on low-end machines.
Installation instructions and utilities:
http://aminet.net/package/disk/misc/PFS3_53Latest version (binary only):
http://aminet.net/package/disk/misc/pfs3aioSFS is a bit faster than FFS but slower than PFS. It needs a 68020 CPU. And it is a catastrophy regarding support. It can run stable over years, but if something goes wrong you usually lose everything. There is no repair tool and the only salvage tool does not work.