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Fast NBT logo

Fast NBT

Mod

by nutant233

Speed up all kinds of NBT operations and improve game performance

Type

Mod

CurseForge Downloads

588,054

CurseForge ID

1417466

Last Updated

Jul 27, 2026

Description

This mod optimizes various methods in the CompoundTag class:
  1. 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.
  2. 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.
  3. It optimizes operations involving get methods in other related classes.

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Included in Modpacks

Soulrend - Dark Fantasy RPG Soulslike Soulrend - Dark Fantasy RPG Soulslike Adventure Life - Legacy Adventure Life - Legacy [PNAA] Pandemonium Nexus: Anarchic Aeon [PNAA] Pandemonium Nexus: Anarchic Aeon AdvoTech JJThunder AdvoTech JJThunder AdvoTech ValkyrienSkies (abandoned) AdvoTech ValkyrienSkies (abandoned) Rikku's RavenbrooksCr Game [PA] (DO NOT UPDATE THE MOD PAST 1.4.0!) Rikku's RavenbrooksCr Game [PA] (DO NOT UPDATE THE MOD PAST 1.4.0!) Compression Compression Hello there, Neighbor Hello there, Neighbor IRONFALL; Annihilation IRONFALL; Annihilation Vile Shadows Vile Shadows Reqium Reqium The Adventure of 1000 - Hunters of Evil The Adventure of 1000 - Hunters of Evil SUPERIOR - RPG SUPERIOR - RPG Farlands - Origins Of The Olimpus Farlands - Origins Of The Olimpus Create The Ultimate warfare Create The Ultimate warfare Terraclysm Terraclysm

External Resources

CurseForge Source Code