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Fast NBT

Mod

by nutant233

Speed up all kinds of NBT operations and improve game performance

Type

Mod

CurseForge Downloads

765,175

CurseForge ID

1417466

Last Updated

Sep 8, 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.

Recommended Gear

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Hardware and extras that pair well with this mod.

LEGO Minecraft Set

LEGO Minecraft Set

Official sets that translate the building side of the game off-screen.

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Included in Modpacks (18)

Soulrend - Dark Fantasy RPG Soulslike Soulrend - Dark Fantasy RPG Soulslike SUPERIOR - RPG SUPERIOR - RPG Compression Compression Adventure Life - Legacy Adventure Life - Legacy Create The Ultimate warfare Create The Ultimate warfare AdvoTech JJThunder AdvoTech JJThunder Hello there, Neighbor Hello there, Neighbor Dopeman's Apocalypse to die for Dopeman's Apocalypse to die for Reqium Reqium [PNAA] Pandemonium Nexus: Anarchic Aeon [PNAA] Pandemonium Nexus: Anarchic Aeon 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!) AdvoTech ValkyrienSkies (abandoned) AdvoTech ValkyrienSkies (abandoned) IRONFALL; Annihilation IRONFALL; Annihilation Farlands - Origins Of The Olimpus Farlands - Origins Of The Olimpus Mystic's Monstrosity - Avaricious Edition Mystic's Monstrosity - Avaricious Edition The Adventure of 1000 - Hunters of Evil The Adventure of 1000 - Hunters of Evil Vile Shadows Vile Shadows Terraclysm Terraclysm

External Resources

CurseForge Source Code