Could you check the list[1] http://freebsd.1045724.n5.nabble.com/Suggest-changing-dirhash-defaults- for-FreeBSD-9-2-td5839351.html and contribute any benchmarks that you know of that are more recent than 2008? References 1. http://freebsd.1045724.n5.nabble.com/Suggest-changing-dirhash-defaults-for-FreeBSD-9-2-td5839351.html