Why did you even change the file system?
We wanted to make a better use of buffering. Computers today have immense quantity of unused memory. This new software almost works, we still have some minor bugs to fix, but the results so far are incredible. On computers with 16GB of RAM we can dedicate as much as 13 GB to buffering and almost no data is read from the hard drive, everything is in the RAM. It performs even faster than SSDs. We only have to write to the disk anymore and that’s mainly for reliability reasons. I estimate we’re a year away from the whole thing working flawlessly. From this aspect the 6 month release cycle is a bit limiting.
Taken from here:
I always here that freebsd is about performance and openbsd is about security.