Elytra Optimizer

Why Elytra Optimizer?

Large multiplayer servers often stall when several players fly with elytra. Those stutters are the server choking on sudden chunk requests. Elytra Optimizer is a conservative Fabric server mod that smooths those bursts without changing gameplay.

How it works

• Detects players in elytra flight with a safe speed threshold.
• Predicts chunks ahead using an adaptive cone (45° when turning, narrows to 5° during straight flight—up to 80% fewer chunks loaded on long journeys).
• Issues short-lived chunk tickets so those chunks load gradually instead of all at once.
• Automatically throttles predictions when MSPT exceeds 40ms, disables entirely above 50ms.
• Pauses when memory usage exceeds 75% to prevent out-of-memory issues.
• Auto-enables "Lite mode" on servers with less than 2GB RAM (reduced cone, fewer chunks, lower limits).
• Skips chunks that are already loaded—no wasted work.
• Falls back to vanilla instantly if anything misbehaves.

Compatibility

Plays nicely with the Fabric optimization stack: C2ME, Lithium, Starlight, FerriteCore, Krypton, ModernFix, Noisium. Detects and supports modded flight from Origins, Create, Colytra, Trinkets, Curios, and Caelus API.

Commands

• /eo stats — TPS, memory, flying players, active tickets at a glance. Shows active modes (Lite, Conservative) and warns when resources are low.
• /eo toggle — disable without restart when things get busy.
• /eo debug — per-player flight details: straight-flight distance, current cone angle, ticket count.
• /eo reload — re-detect installed mods after changes.

Technical details

Uses primitive collections (fastutil), pre-computed trig tables, squared distance comparisons, and thread-local buffers. Targets under 50 microseconds per player per tick with zero GC pressure. Tickets expire after 5 seconds; stale tickets are cleaned up immediately on direction changes.

Dependencies

• Fabric API

All logic runs server-side (works in singleplayer too because it's just an integrated server). Players don't need the mod installed. Minimal config, fewer lag spikes when everyone takes to the skies.