As was mentioned in last Friday's article, Which Is Faster:
Debian Linux or FreeBSD, tests of FreeBSD atop the ZFS file-system
(rather than UFS2+S) are currently underway and those results are
expected to be published in full later this week as the ZFS disk
performance is compared directly to UFS2+S, UFS2+J, and also Ubuntu
Linux with the EXT4 and Btrfs file-systems. Today though we have a few
ZFS performance numbers to share as we look at the performance of the
new CAM-ATA sub-system on FreeBSD.