I see a number of changes in the 4.8 changelog referencing additions
of AES-NI and AES-GCM. This PDF from Intel extolls the (rather
astounding) virtues for linux:

http://edc.intel.com/Link.aspx?id=3754

Has anyone published any performance numbers for this on OpenBSD
running on fancy new Intel processors? Google searches are coming up
with nothing.

There are a few obvious linux-specific enhancements there, but I'm
hoping the OpenBSD support comes close to the single-thread
performance. Line-rate GigE at 500 byte packets would be pretty
pleasing by itself.

--Doug