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Fast Particles

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Fast Particles

By covalscy

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High-performance particle engine eliminating GC stutter from dense smoke, campfires, and explosions

Mod Loaders
Minecraft
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About

Description

Fast Particles is a client-side optimization mod that eliminates lag spikes and micro-stutters caused by heavy particle effects (campfires, smoke, explosions, fire).

What it does

Vanilla Minecraft allocates a separate Java object on the heap for every single particle. When hundreds of particles spawn at once, the garbage collector struggles and causes noticeable stutter.

Fast Particles replaces this with memory-pooled flat arrays:

  • Zero GC churn: No object allocation during particle spawning or ticking.
  • Faster depth sorting: Linear bucket sort for transparent particles.
  • Half-res rendering: Optional 50% resolution pass for heavy smoke to save GPU fillrate.
  • FPS budgeting: Dynamically scales particle density under heavy load.

Currently optimizes: campfire smoke, regular/large smoke, explosions, and flames.

Notes

  • Client-side only; safe to join any server.
  • Compatible with Iris shaders and Sodium / Embeddium.
  • In-game debug overlay: /fastparticles hud.