OpenBSD 4.6 was again left out with GnuPG, but with this file encryption benchmark Sun's OpenSolaris 2009.06 shined and was faster.
The Gcrypt library benchmark with the CAMELLIA256-ECB cipher was rather interesting. The Linux and OpenSolaris results are actually there, but the FreeBSD and OpenBSD results are enormously slower. The best performance was with Debian GNU/kFreeBSD with a time of 2796ms for this cipher test while Fedora 12 was in second with a time of 3487ms followed closely by OpenSolaris 2009.06 at 3750ms and then Debian GNU/Linux at 4410ms. While the FreeBSD kernel within a GNU user-land and glibc was the fastest, something within the FreeBSD and OpenBSD operating system is causing Gcrypt to run at a snail's pace, which is worth further investigation.
Fedora 12 came out in front while Debian GNU/kFreeBSD took a last place finish with Debian GNU/Linux coming in second to the last.