Achievements Optimizer

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!

What means Verified?

• Compatibility: The mod should be compatible with the latest version of Minecraft and be clearly labeled with its supported versions.
• Functionality: The mod should work as advertised and not cause any game-breaking bugs or crashes.
• Security: The mod should not contain any malicious code or attempts to steal personal information.
• Performance: The mod should not cause a significant decrease in the game's performance, such as by causing lag or reducing frame rates.
• Originality: The mod should be original and not a copy of someone else's work.
• Up-to-date: The mod should be regularly updated to fix bugs, improve performance, and maintain compatibility with the latest version of Minecraft.
• Support: The mod should have an active developer who provides support and troubleshooting assistance to users.
• License: The mod should be released under a clear and open source license that allows others to use, modify, and redistribute the code.
• Documentation: The mod should come with clear and detailed documentation on how to install and use it.

How to Install