0.014c

Just found why I'm skipping turns so bad —

if (Math.random() < 0.01) {
  ArrayList<Object> list = new ArrayList<>();
  for (int i = 0; i < 10000000; ++i) {
    list.add(new Object());
  }
}

I forgot to comment this out.

Anyway, I think I'm still skipping turns badly when I run two clients together, as a newer version which is theoretically the same as previous version performs much worse.

I can never run more than one battle (1v1) at a time without skipping turns, because the computer I have at the moment is not well suited for this. Never even tried Melee. Maybe you should check if two Neuromancer battles would cause skipped turns and, if not, then specifically worry about ScalarBot.