Hey, today I want to show you a simple way that you can greatly increase the FPS(frames per second) in Minecraft 1.12.2.

Step 1: Installing Minecraft Forge

To install and benefit from a significant increase FPS in Minecraft, you have to install Minecraft Forge (this mod will let you install other mods in the game).

Step 2: Download Optifine

Optifine is the mod that will increase your FPS in Minecraft, but will get others functions(shaders support, HD resource pack support) from this mods.

Step 3: Installing the Optifine Mod

This mod is installing very easy and fast, all you have to do is:

1. Press the Windows + R on your keyboard.
   
2. In the Run, you will type: %appdata%/.minecraft/mods
   
3. Move the Optifine Mod jar file to mods folder.
   

Step 4: Open Minecraft With Forge Profile

Now, you will have to open the Minecraft launcher with Forge profile.

Step 5: Optifine Settings

Now if you have done all the steps well, in Minecraft -> Options -> Video Settings you will have a list with many settings you can do.

Here are the best settings for Optifine in Minecraft 1.12.2:

• Render Distance: 4 Short
  
• Graphics: Fast
  
• Smooth Lighting: None
  
• Smooth Lighting Level: 0%
  
• View Bobbing: On or off (Can stay on if you like it on)
  
• Brightness: 50%
  
• Alternate Blocks: on
  
• Fog: Off
  

Quality:

• Clear Water: Off
  
• Better Grass: Off
  
• Custom Fonts: Off
  
• Details:
  
• Trees: Fast
  
• Sky: Off
  
• Clouds: Fast / Off (for more fps off)
  

Animation Settings:

• Choose all OFF