How to decrease lag in Minecraft

Change the game settings: 

If you’re lagging while your render distance is set to “Far” and “Fancy” graphics, chances that lowering them will give you a much more playable framerate. Enabling “Advanced OpenGL” also helps for some computers.

Lowering the resolution of the Window can also help; try to avoid maximizing the game window.

Also, try changing the game settings by doing this:
Go to your Minecraft folder in AppData (if it is hidden, open Run and type %appdata%, press enter, then go to Roaming, then go to Minecraft. Find the options.txt file, open it then delete everything. Replace it with this code:

Download CODE Below:

Update Java:

Minecraft is coded in the Java programming language, updating it will impact your in-game performance. If you’re one of the few who is still running an outdated version of Java, update now! The updates often contains optimizations to speed up your game. If you’re feeling adventurous, you can get the unreleased Java 7.

Razer Game Booster:

Get Razer Game Booster from this link: It will dramatically help your gameplay: http://www.razerzone.com/gamebooster

Install optimization mods:

OptiFine - This little optimization mod helps you increase FPS by tweaking how the fog and chunks are displayed. Also make them prettier in Fancy rendering. It will make use of occlusion Culling to prevent rendering of parts you can’t see, thus speeding up the game.
The newest release of OptiFine also includes the optimizations made in CAF-mod and OptiMine, making it the all-in-one solution mod to speed up your FPS.

A special version of OptiFine now also make use of multi-cores in order to increase rendering speed even more, in order to give you even better FPS. It also supports optimizing HD texture packs without problems.

The mod works on Windows as well as Linux and MAC OS X, so you will be able to optimize the game on your Macbook as well. Get the mode on the official Minecraft forums: OptiFine.

This video tutorial on how to install OptiFine on Windows may help you out:

http://www.youtube.com/watch?v=ctNkb4BfT8M

Still stuck? Here’s the instructions how to install OptiFine on Windows:

Windows Instructions:

1) Find your minecraft.jar file. On Windows, it’s in %APPDATA%/.minecraft/bin. Optionally, make a backup of minecraft.jar and save it somewhere safe, in case something goes wrong.

2) Open minecraft.jar in an archive editor program like WinRar

3) Delete the META-INF folder, this is important or it will break the game.

4) Copy all files from the OptiFine package into minecraft.jar and overwrite all existing files.

5) Now, run Minecraft and test it! If everything is well, you should see an performance increase. For even more frames, the mods adds a few additional options in the video settings, tweak them to optimize the game performance.

Setting high priority to Minecraft in the Task Manager

Running MC in High Priority:

Step by step instructions
1. Run Minecraft

2. Open Task Manager

3. Go to Applications and right click on Minecraft, the running process, and click "Go to Process"

4. Right click on the process it brings you to, I think it is javaw.exe. Now click Set Priority and set it to High.



You are now done with that!

Download CODE: