ID:1453222
 
My friend told me this version allows less lag for bigger games, is that true?
The engine certainly has a few new nifty tricks to lower CPU usage, sure. See: http://www.byond.com/forum/?post=1375479

The removal of step_delay automatically configuring probably helped quite a bit, too. I think Lummox mentioned the code being outdated and it could have caused some performance issues instead of, as intended, doing good.

Also see:

http://www.byond.com/forum/?post=1405894#comment7136869
http://www.byond.com/forum/?post=1398928
http://www.byond.com/forum/?post=1305354#comment5230428

So yeah, optimizations seem to be fairly frequent, and it would probably be in your best interest to keep your game / server up to date if you run one.