ESFix

A lightweight performance fix for Eternal Starlight.

The Problem

Eternal Starlight's book unlock system calls getOrCreateBookProgressions() for every inventory slot every 200 ticks. Each call hits data storage multiple times with no caching, causing significant TPS lag on servers - especially with multiple players online.

The Solution

ESFix adds a simple mixin that caches book progression data for 5 seconds per player, dramatically reducing data storage access and improving server performance.

Requirements

- NeoForge 1.21.1 - Eternal Starlight

Installation

Drop the jar in your mods folder alongside Eternal Starlight.

• PS Yes, I know the logo is terrible, CF makes me put something there.