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Achievements Optimizer

Mod

by big_energy

Improved achievement performance

Type

Mod

CurseForge Downloads

10,003,198

CurseForge ID

912788

Modrinth Downloads

1,017,109

Modrinth ID

SvXrP8rT

Last Updated

Jun 12, 2026

Description

Achievements Optimizer is a lightweight performance mod that optimizes how item-based achievements and advancements are processed — reducing unnecessary inventory scans and improving overall tick efficiency. It doesn’t change any gameplay mechanics or logic — only makes achievement checks faster and cleaner under the hood. ⚙️** Key Optimizations** - Early tick skipping — heavy slot calculations (empty/occupied/full) are skipped early, preventing extra work per event. - Instant empty stack discard — with ignoreEmptyStacks enabled, empty stacks are removed immediately without scanning the entire inventory. - Fast multi-item matching — single-pass inventory check using boolean[] flags with early exit. No allocations, noticeably faster on large inventories or long condition lists. - Early slot filtering — slots.matches(full, empty, occupied) is evaluated first, avoiding deeper checks when slots don’t match. - Preserved fast path for single targets — when items.size() == 1, the comparison is done directly on the changed slot without a full inventory pass. 🚀 **Result** Fewer redundant checks, less memory churn, and faster responses to inventory events. Particularly beneficial for servers or modpacks with many players and complex advancement triggers. **From version 2.0.0 required Forge Config API Port (only for fabric version). ** Feel free to write about all problems and suggestions on my github! Good luck!

Compatibility

Mod Loaders

Fabric Forge Neoforge

Game Versions

1.18.2 1.19.2 1.20.1 1.20.2 1.20.3 1.20.4 1.21 1.21.1 1.21.4 1.21.9 +2 more

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Included in Modpacks

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ProhlisCraft 4: Return of the Prohlisgang! capybara’s play oritech capybara’s play oritech Arcane Project Genesis Arcane Project Genesis Modularity: Industrial Progress - (M:I1) Modularity: Industrial Progress - (M:I1) Zylla's MineColonie: Medieval Crafting & Creation Zylla's MineColonie: Medieval Crafting & Creation XVIII-TheLunarSMP XVIII-TheLunarSMP AluCraft SMP AluCraft SMP Peace of Mind 21.1 Peace of Mind 21.1 Sodtesium Sodtesium Fall of Days – Zombie Survival Fall of Days – Zombie Survival All You Need 2 - AYN 2 All You Need 2 - AYN 2 Haln's Classic RPG Haln's Classic RPG Meow to Exile 2 Custom By Seraphina Meow to Exile 2 Custom By Seraphina Izakji's Zombie Apocalypse II Izakji's Zombie Apocalypse II Easycraft (Official) Easycraft (Official) Limbones Server Modpack Limbones Server Modpack Enchanted Genesis Enchanted Genesis Untitled Modpack - Hard Survival Untitled Modpack - Hard Survival Fiction Friction Gaming Fiction Friction Gaming Shev's Haven Shev's Haven Cobblemon Union Cobblemon Union

External Resources

CurseForge Modrinth Issues