
Modrinth · Minecraft mod
APTweaks: Spawn (11.x Classic)
Optimization for monster spawn events and spawner.
Quick answer
Which APTweaks: Spawn (11.x Classic) release should I use?
APTweaks: Spawn (11.x Classic) 11.6.1 targets 1.21.1 with Forge. Do not install it on the client. It must be installed on the dedicated server. All 1 required mods have matching files.
Where it goes
Is APTweaks: Spawn (11.x Classic) required on the client, server, or both?
Do not install it on the client. It must be installed on the dedicated server.
This file is marked server-only.
What else does APTweaks: Spawn (11.x Classic) 11.6.1 need?
11.6.1. Change the file and its required mods may change too.
Install APTweaks: Core (11.x Classic) first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
1 extra mod was pulled in by another dependency. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add APTweaks: Spawn (11.x Classic) without breaking your instance.
Built for APTweaks: Spawn (11.x Classic) 11.6.1. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 11.6.1. It targets 1.21.1 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install APTweaks: Core (11.x Classic) first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
- 03
Put it on the correct side
Do not install it on the client. It must be installed on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 11.6.1. It opens that exact file at the source.
About this project
What does APTweaks: Spawn (11.x Classic) add?
👾 Adaptive Performance Tweaks: Spawn (11.x Classic)
ℹ️ 11.x Classic Module
This module belongs to the classic Adaptive Performance Tweaks 11.x module system and remains available for existing modpacks.
New features and active development continue in the new all-in-one version:
Adaptive Performance Tweaks⚠️ Do not use this module together with Adaptive Performance Tweaks 12.x or newer.

Server-side Forge module that optimizes mob spawning: smarter distribution, spawn limits, and
spawner tweaks to keep entity counts under control.
Works standalone on the server; clients are optional.
Status ✅
Stable 11.x Classic / LTS module for existing Forge modpacks.
Critical fixes and compatibility updates may be provided when needed. New features, new loader support, and modern Minecraft version updates are developed in the new all-in-one Adaptive Performance Tweaks version.
Requirements 🧩
Requires Adaptive Performance Tweaks: Core
Features ✨
- Server-side only; clients do not need to install the mod.
- Pick only the modules you want; highly configurable via config files.
- No core/mixin patches → broad mod compatibility.
- Built-in debug info to see what the optimizer is doing.
⚠️ Always keep regular backups of your world.
Spawn optimizations 👾
- Optimized mob spawn calculations around the player for better distribution and fewer entities.
- Basic spawn control: per-player/world caps, allow/deny lists, and presets for popular mods.
- Adaptive spawn rate considers players, caps, server load, and game difficulty.
- Spawner optimization: track loaded spawners and apply lightweight tweaks.
- Configurable via adaptive_performance_tweaks/spawn/*.toml.
Bundled modules 📦
Want everything at once? Install the bundled version:
Project description from Modrinth.
Pick your setup
APTweaks: Spawn (11.x Classic) by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.21
1 loader build1.20.6
1 loader build1.20.4
1 loader build1.20.3
1 loader build1.20.2
1 loader build1.20.1
2 loader builds1.20
1 loader build1.19.4
1 loader build1.19.3
1 loader build1.19.2
1 loader build1.19.1
1 loader buildShowing the newest 12 of 14 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
APTweaks: Spawn (11.x Classic) versions and loaders
11.6.1
adaptive_performance_tweaks_spawn_1.21.1-11.6.1.jar
10 Mar 2026
11.6.1
adaptive_performance_tweaks_spawn_1.20.1-11.6.1.jar
10 Mar 2026
11.6.1
adaptive_performance_tweaks_spawn_1.19.2-11.6.1.jar
10 Mar 2026
11.6.1
adaptive_performance_tweaks_spawn_1.18.2-11.6.1.jar
10 Mar 2026
11.6.0
adaptive_performance_tweaks_spawn_1.21.1-11.6.0.jar
3 Mar 2026
11.6.0
adaptive_performance_tweaks_spawn_1.20.1-11.6.0.jar
2 Mar 2026
11.6.0
adaptive_performance_tweaks_spawn_1.19.2-11.6.0.jar
2 Mar 2026
11.6.0
adaptive_performance_tweaks_spawn_1.18.2-11.6.0.jar
2 Mar 2026
11.5.0
adaptive_performance_tweaks_spawn_1.21.1-11.5.0.jar
28 Aug 2025
11.5.0
adaptive_performance_tweaks_spawn_1.20.1-11.5.0.jar
28 Aug 2025
11.5.0
adaptive_performance_tweaks_spawn_1.19.2-11.5.0.jar
28 Aug 2025
11.5.0
adaptive_performance_tweaks_spawn_1.18.2-11.5.0.jar
28 Aug 2025
Looking for an older file? The official Modrinth project page is in Resources.