I've just updated and then installed a fresh copy of 1.8.5p2 to test, and I'm finding that out of the box, all commands (except $-commands stored on local objects) and function-calls (and just plain ol stuff like 'say' and 'pose') are resulting in about 0.5secs of lag before the output shows up. Not happening on the same host (mudhosting) with 1.8.4p7 or p8.
Very odd, and a bit of a mystery. I'm looking at other games that are on 1.8.5+ that are running with none of this random spot-lag. I just can't figure out why it's happening.