Hi, I'm use the plugin PlayerMarkers for my Overviewer Map. During the plugin is enables my Server laggs(14-18TPS), so i disabled the Plugin and the laggs are still here but only a litte bit (19-20) TPS. I'm confused, why this plugin is cause lagg, because it's IO should be in a async task, but I doubted at that is realy async. So I had modifyed the code a litte bit: Code (Text): getServer().getScheduler().scheduleAsyncDelayedTask(this, mDataWriter); to Code (Text): new Thread(mDataWriter).start(); and the Problem is solved. But i don't understand why, bukkit should do the same as Thread.start() or not?