Harium
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A general-purpose optimization mod that rewrites inefficient vanilla code for AI, redstone, entities, hoppers, and physics without changing game behavior
Enhances game performance and optimizes resource usage.
Forge is a popular mod loader for versions 1.1+ of Minecraft.
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Harium | General Purpose Optimization
Smart Performance Through Intelligent Code Replacement
What Is Harium
Harium is a general-purpose optimization mod (based on Lithium) that rewrites inefficient vanilla code with faster, smarter implementations — without changing game behavior.
Same Game. Better Performance.
Harium targets the most CPU-intensive systems in Minecraft: entity processing, redstone, AI, hoppers, and physics — replacing slow algorithms with optimized alternatives that produce identical results.
Optimization Categories
Each category can be individually enabled or disabled.
- AI & Pathfinding: Faster block type lookups, optimized POI searches, removed useless behaviors
- Entity System: Section-based movement tracking, optimized collision detection, smarter item merging
- Block & Redstone: Optimized redstone wire power calculations, BlockEntity sleeping for inactive tiles
- Hopper & Inventory: Event-driven hopper logic with caching — hoppers only scan when inventories actually change
- Memory Allocations: Eliminates unnecessary object creation in hot code paths using FastUtil collections
- VoxelShapes: Specialized shape implementations for faster collision detection and ray tracing
- Collections: Replaces standard Java collections with optimized FastUtil alternatives throughout
Key Technical Approaches
- Event-Driven Architecture: Block sections notify listeners only when changes occur, instead of polling every tick
- Caching Layers: Multiple levels of caching for block states, entity positions, and inventory contents
- Smart Iteration: Chunk-ordered entity iteration for better CPU cache locality and early termination
- Reduced Locking: Array-based data tracker entries instead of synchronized maps
Fork Information
Harium is a fork of Lithium by jellysquid3.
Compatible: Designed to be fully compatible with vanilla behavior. No gameplay changes.
Credits & Support
Original Lithium created by jellysquid3 and maintained by the community.
Harium extends the optimization coverage with additional improvements.
Join the Community
Get help and updates on our Discord.
Harium - Maintained by Hari - High Performance Minecraft
Harium | General Purpose Optimization
Smart Performance Through Intelligent Code Replacement
What Is Harium
Harium is a general-purpose optimization mod (based on Lithium) that rewrites inefficient vanilla code with faster, smarter implementations — without changing game behavior.
Same Game. Better Performance.
Harium targets the most CPU-intensive systems in Minecraft: entity processing, redstone, AI, hoppers, and physics — replacing slow algorithms with optimized alternatives that produce identical results.
Optimization Categories
Each category can be individually enabled or disabled.
- AI & Pathfinding: Faster block type lookups, optimized POI searches, removed useless behaviors
- Entity System: Section-based movement tracking, optimized collision detection, smarter item merging
- Block & Redstone: Optimized redstone wire power calculations, BlockEntity sleeping for inactive tiles
- Hopper & Inventory: Event-driven hopper logic with caching — hoppers only scan when inventories actually change
- Memory Allocations: Eliminates unnecessary object creation in hot code paths using FastUtil collections
- VoxelShapes: Specialized shape implementations for faster collision detection and ray tracing
- Collections: Replaces standard Java collections with optimized FastUtil alternatives throughout
Key Technical Approaches
- Event-Driven Architecture: Block sections notify listeners only when changes occur, instead of polling every tick
- Caching Layers: Multiple levels of caching for block states, entity positions, and inventory contents
- Smart Iteration: Chunk-ordered entity iteration for better CPU cache locality and early termination
- Reduced Locking: Array-based data tracker entries instead of synchronized maps
Fork Information
Harium is a fork of Lithium by jellysquid3.
Compatible: Designed to be fully compatible with vanilla behavior. No gameplay changes.
Credits & Support
Original Lithium created by jellysquid3 and maintained by the community.
Harium extends the optimization coverage with additional improvements.
Join the Community
Get help and updates on our Discord.
Harium - Maintained by Hari - High Performance Minecraft
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