Its never better to edit the SRC.. It's always better to make a plugin.. It doesnt lag, editing the SRC with update player list causes more lag because it does everyone at once. This does a task on each join so there is not much lag. Anyways you guys are funny.. Someone gives you the plugin your asking for and you still complain. So ungrateful.
Let me tell you something about PHP @Levi the more stuff you add to a server the more it lags.. So enjoy your laggy server!