$ ./time
1000000 calls to gettimeofday() ... 4.503s
$ uname -srp
OpenBSD 4.2 AMD Athlon(TM) XP 2600+ ("AuthenticAMD" 686-class, 512KB L2 cache)
$
Seems fine here, looks like the error is on your end.. ;)
Have you tested on 4.3/snapshots.. perhaps enabling/disabling acpi.. etc?
-Nix Fan.
