Lon

Lon is a lightweight performance mod (only ~45KB) crafted for low-end PCs. It combines smart chunk pre-generation, real-time server monitoring, intelligent memory management, and an on-screen performance HUD to ensure smooth gameplay without bloat.

🖥️ Real-Time Performance HUD Keep an eye on FPS, memory usage, and TPS directly in the top-left corner of your screen. The HUD is color-coded, adapts to GUI scale, and hides automatically when the screen is hidden.

⚡ Core Features /pregen <radius> – Pre-generate chunks safely on the main thread to eliminate exploration lag. Includes stop and status controls.

/lon tps – Check server TPS with green/yellow/red feedback for instant performance insight.

/lon tps history – View the average and lowest TPS over the last 5 minutes.

/lon memory – Display current memory usage, allocated, and max heap.

/lon memory gc – Manually trigger garbage collection and see freed memory.

/lon entities – Count total entities, hostile mobs, passive mobs, and dropped items.

/lon chunks – Show loaded chunk count.

/lon report – Generate a one-command performance snapshot (TPS, memory, entities, chunks).

/lon help – List all available Lon commands.

🛡️ Background Guardians Auto GC – Automatically triggers garbage collection when memory usage exceeds 80% (cooldown 1 minute).

Entity overload warning – Notifies all players when the total entity count exceeds 500.

TPS history – Silently records per-minute TPS for retrospective analysis.

Object pooling & string deduplication – Reduce memory allocation pressure transparently.

📦 Requirements Minecraft 26.1.2

Fabric Loader ≥ 0.19.1

Fabric API 0.145.4+26.1.2

Java 25

💡 Perfect Companions For the ultimate low-end optimization stack, pair Lon with Sodium, Lithium, and FerriteCore.

📝 Note The on-screen HUD was implemented using the standard Fabric API HUD system (HudElementRegistry) and is fully compatible with Minecraft 26.1.2. No experimental Mixins are used, ensuring maximum stability.