Well look at that! That annoying lag spike of death (LSOD) has returned to Minecraft 1.8.1. Luckily, there’s a fix. The download to the file is located below, but let’s educate you first on what the lag spike of death.
The alleged “Lag Spike of Death” happens when Minecraft saves the world. Unfortunately, Minecraft saves the game every 2 seconds. It might not be a big deal at first, but as you explore and progress further in the game, it starts to become and issue. You may notice that when you start a world, it doesn’t have that many of these lag spikes. That’s because the chunks are still loading, and you haven’t explored as much yet. Once the chunks load however, and once you start to explore, the world expands and Minecraft starts loading more chunks. Sadly, even if you don’t tamper with any of the blocks and just explore, it still saves every single block, even if you didn’t move any blocks. So let’s say you traveled 1 kilometer in game. While you are traveling, it loads the chunks all around you. All those loaded chunks however, get saved too. So in theory, if you were to travel to the Far Lands by foot (hopefully you don’t have that much time on your hands), it would make your game “lag” horribly due to the amount of blocks Minecraft will have to save. Anyways, let’s get on to how to fix the lag spike of death.