Fast NBT

Mod

by nutant233

Speed up all kinds of NBT operations and improve game performance

Type

Mod

CurseForge Downloads

349,037

CurseForge ID

1417466

Last Updated

Jun 9, 2026

Description

This mod optimizes various methods in the CompoundTag class:

For all kinds of get methods: In the vanilla game, it first calls the contains method to check if the key exists, then invokes the get method. This results in two map lookups. This mod merges these two operations into one and applies inlining, which greatly improves the lookup speed.
It optimizes the iteration logic of the class: It replaces the pattern of iterating with keySet paired with get with an approach that iterates keys and values simultaneously, thus avoiding a large number of lookups during iteration.
It optimizes operations involving get methods in other related classes.