From an email from Theo de Raadt on the OpenBSD tech mailing list:
The i386 architecture has now been switched to PIE. There is a small
performance hit, but this part of ASLR is valuable combined with
W^X and the stack protector.
This is a non-trivial upgrade, so please be careful. Check the FAQ
for details or use a snapshot.
The original email can be found at http://marc.info/?l=openbsd-tech&m=138829916120601&w=2
For ASLR (Adress Space Layout Randomization) see https://en.wikipedia.org/wiki/Addres..._randomization
For PIE (Position-Independent Executable) on OpenBSD see http://www.openbsd.org/papers/nycbsdcon08-pie/