Minecraft Lag occurs due to traffic congestion on the supported server and the inefficient route taken by your internet connection. Your ISP may route your internet traffic via an overcrowded route that causes massive lag in your online gameplay.
Why is Minecraft single player so laggy?
If you are experiencing lag in Minecraft in the single player mode of the game, the reason behind it is mostly the same, i.e. unavailability of adequate resources.
Why is Minecraft Java so laggy?
Lag in Minecraft occurs when there is a delay between your input and the actions performed by your character in the game. It also happens when your internet connection takes a high-traffic route to the server, or if the server has traffic issues while playing in multiplayer mode.
Why does my Minecraft lag when I have a good computer?
Since the game runs entirely on Java, the most common problems that cause Minecraft Lag with good computer is improper configuration for Java. First of all, you should check to see if Java is installed on your computer and is set up properly.