aTNO

a Totally Normal Optimization Modpack

aTNO (or a Totally Normal Optimization modpack for long) is an overly complicated optimization modpack made for the 26.1.2 (there's gonna be other versions in the futur) that try to push further the optimization made without sacrificing much of the base quality (now including bugfixes)

Disclaimer: This is made for mid-range/high-end PC and may be worse than vanilla on low-end PC (not tested yet)

Second Disclaimer: This run worse on a Phone (tested on the Oneplus 9 Pro)

Da Number

Duck	Vanilla	aTNO¹	Fabulously Optimized²	Remarkably Optimized²	Adrenaline²	Winner
Avg FPS³ ⁸	232	356	281	283	280	aTNO
1% Low Avg FPS³ ⁸	Not Modded	120-138	180-200	130-168	180-200	FO / Adrenaline
Avg Tick Time (ms)³	14.8-16.2	5.5-5.9	11-12	12.5-13	11-12.5	aTNO
Avg CPS (chunky)⁴	Not Modded	573,55	113.92	384.59	468.04	aTNO
Loading Time (s)⁵	6	15	11	10	9	Vanilla
World Creation Time (s)⁶	18	11	20	10	10	RO / Adrenaline
Memory Usage (MB)⁷	620	580	670	520	450	Adrenaline

1. The Vulkan Version was used (Updated for V1.2, using Shenandoah GC)
2. The latest 26.1.2 version of these modpack was used (using G1 GC)
3. The test was on 32 chunk of render distance and simulation with uncapped FPS, looking at the sea
4. This command was used: /chunky start minecraft:overworld circle 0 0 2500 2500
5. From clicking launch to the menu (didn't count the fade in time)
6. From clicking create world till it's fully loaded (used the F3 + 2 graph)
7. When creating a new world and waiting until its fully loaded (after GC)
8. Depending on the mods/modpack (idk if it apply here), the 1% lows can be fake

This was tested with a Ryzen 5 5500, a GTX 1060 6GB, 6GB Allocated RAM and a SSD SATA on CachyOS with a 1440p monitor

Da Version

The modpack come in 3 version, with each some difference, so its always good to choose the one who fit best

Vulkan Version:

The Vulkan Version make use of multiple advanced technologies like Vulkan, OpenCL and Rust to give the best result on modern hardware. Use this Version if your PC is recent enough and the GPU have enough headroom for the OpenCL utilization (see the advanced section for the OpenCL hardware recommendation).

Sodium Version:

The Sodium Version stay in the OpenGL side with Sodium and does not go into Vulkan, OpenCL or Rust. Use this version if your PC is not recent enough, your PC is not powerful enough or if you prefer the OpenGL side.

Server Version:

The Server Version is made and only for the Server (eg. via Self Hosting or a Server Host), it get ride of the client optimization, which is irrelevant. Use this version ONLY for (and not on) a Server.

The version name

The version name is a combination of multiple things such as:

• The V for version
• The major version, for example for the 26.1.2 its the 26, writed with a 6. For 1.21.1 its the 1, writed with a 1. Separated with a point.
• The sub-major version, for example for the 26.1.2 its the 1.2, writed with a 12. For 1.21.1 its 21.1, writed as 211. Separated with a point.
• The number of realease for this version, for example if the modpack has been released 6 time, the number is gonna be 6. Separated with a point.
• The variant, if its the Sodium Variante then its gonna be Sodium. Separated with a middle dash.

When putting it all together, it give for the fifth release of the Sodium variant of the modpack for 26.1.2 the V6.12.5-Sodium

Fabric

You need Fabric 0.19.3 or later to run the modpack

Q&A

Is it compatible with Vanilla Client/Server ?

Yes, it's fully compatible with Vanilla Clien/Server.

How can I use your Modpack (not only for playing) ?

You can use my modpack as a base for your own Modpack (not obligated, but it would be nice to says that you used it), fork it, use it to compare (saying the version used) and basically everything else (execpt stealing tho, its not nice to steal).

What should I check when using the modpack as a base ?

Firstly you need to choose between Vulkan or Sodium (or Server) due to compatibility reason, then you need to test the incompatibility between mods.

Where can I make a suggestion or report a bug ?

You can make a suggestion or report a bug on the discord server (you can just come in the server discord without any suggestion or bug, so atleast I'm not alone in the serv)

JVM Argument and GC choice (Java 25)

The choice of the JVM argument and the GC can be important, choosing between them can change the experience while playing

Garbage-First (G1) Garbage Collector (GC)

The Garbage-First Garbage Collector (or simply G1 GC) is the Java default garbage collector since Java 9, it's balanced between throughput and latency

Here is the JVM Argument I Recommend:

-XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:G1HeapRegionSize=16M -XX:+ParallelRefProcEnabled -XX:+ExplicitGCInvokesConcurrent -XX:+UseStringDeduplication -XX:+UseCompactObjectHeaders -XX:InitialCodeCacheSize=16M -XX:ReservedCodeCacheSize=384M -Xss2M --enable-preview --enable-native-access=ALL-UNNAMED

Z Garbage Collector (ZGC)

The Z Garbage Collector (or simply ZGC) is a scalable low-latency focused GC with a goal of having near 0 latency and supporting multi-TB heap size

Here is the JVM Argument I Recommend:

-XX:+UseZGC -XX:+ParallelRefProcEnabled -XX:+ExplicitGCInvokesConcurrent -XX:+UseStringDeduplication -XX:+UseCompactObjectHeaders -XX:InitialCodeCacheSize=16M -XX:ReservedCodeCacheSize=384M -Xss2M --enable-preview --enable-native-access=ALL-UNNAMED

Shenandoah GC

The Shenandoah GC is also a low-latency focused GC, it's like ZGC but focused on less bigger heap size

Here is the JVM Argument I Recommend:

-XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:+ParallelRefProcEnabled -XX:+ExplicitGCInvokesConcurrent -XX:+UseStringDeduplication -XX:+UseCompactObjectHeaders -XX:InitialCodeCacheSize=16M -XX:ReservedCodeCacheSize=384M -Xss2M --enable-preview --enable-native-access=ALL-UNNAMED

Da board

Feature	G1 GC	ZGC	Shenandoah
Throughput	High	Medium	Medium
Latency Target	moderate	Strong	Strong
Startup Time	Fast	Moderate	Moderate
Concurrent Compaction	Partial	Full	Full
Memory overhead	Baseline (~10% headroom)	15–30% higher than G1 GC	10–20% higher than G1 GC
Throughput cost	Baseline	5–15% lower than G1 GC	5–10% lower than G1 GC
CPU overhead	Baseline	+5–10% higher than G1 GC	+5–15% higher than G1 GC

(#thanks javacodegeeks)

Advanced

This section is supposed to come in <details> but curseforge doesn't support it, so instead its just gonna be a huge unhidden pile of text

This section come in 6 parts:

• Hardware recommendation for OpenCL (from C2ME OpenCL): This part is just the C2ME OpenCL compatibility matrix (basically)
• Tested Hardware: This part says more details about the system used to test
• Mod parameter: This part says the change made in the config file of mods and why
• Modified Mod: This part says how and why I modified StateStream
• GPU Workloads and P-State (NVIDIA and Vulkan Version Only): This part just says the specific interaction between the Vulkan Version and NVIDIA GPU
• Mod List: This part just says all the mod used (in any version) with their link and author

Hardware recommendation for OpenCL (from C2ME OpenCL)

Minimum hardware requirements

• a working OpenCL 1.2+ driver
• cl_khr_fp64 support (fp64 support)

Recommended hardware (based on C2ME OpenCL suggestion for 1200CPS+, so take it with a huge pinch of salt)

GPU:

• Nvidia GTX 1060 or greater
• AMD Radeon RX 6500 XT or greater
• Intel Arc B570 or greater

IGPU:

• Idk, sorry guys

Nice things to have

• a working OpenCL 3.0 driver
• cl_khr_device_uuid for stable device matching
• CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE for optimal performance. Not present on AMD GPUs
• cl_khr_priority_hints and cl_khr_throttle_hints for queue priority. Only known to be present on Intel GPUs
• Non-uniform workgroups, not present on Nvidia GPUs and some AMD ones

Platform compatibility matrix

• Supported: known to be fully working in general
• Partial: known to be working with some big caveats
• Unsupported: known to be not working at all
• N/A: Not applicable because the combination doesn't exist.

Vendor	Generation	Driver	Windows	Linux	MacOS
NVIDIA	Maxwell and beyond	Proprietary and Open	Supported	Partial¹	Unknown
NVIDIA	Kepler	Proprietary	Unknown	Supported	Unknown
NVIDIA	Older cards	Any	Unknown	Unknown	Unknown
NVIDIA	nouveau supported GPUs	Rusticl on nouveau	N/A	Unknown	N/A
Intel	Gen9, Gen9.5⁵	Official²	Partial³	Partial⁴	Unknown
Intel	Gen11, Gen12, Gen12.5⁶	Official²	Unsupported¹²	Unsupported¹²	Unknown
Intel	Gen12.7, Xe2, Xe3 and beyond⁷	Official²	Partial³	Partial⁴	Unknown
Intel	Older graphics	Official²	Unknown	Unknown	Unknown
Intel	iris supported GPUs	Rusticl on iris	N/A	Unknown	N/A
AMD	RDNA1 and beyond¹⁴	Official⁸	Supported⁹	Supported	Unknown
AMD	GCN	Official¹⁰	Unsupported¹³	Unsupported¹³	Unknown
AMD	radeonsi supported GPUs	Rusticl on radeonsi	N/A	Partial¹¹	N/A
Qualcomm	Any	Official	Unsupported¹²	Unsupported¹²	N/A
Apple	Any	MacOS drivers	N/A	N/A	Unsupported¹²
Apple	Any	Rusticl on asahi	N/A	Unknown	N/A

• ¹ The driver is known to hang after a while. Driver branch 535 LTS seem to work fine.
• ² The official driver package on Windows. Gen9 and Gen9.5 needs up-to-date drivers:
• Gen9: https://www.intel.com/content/www/us/en/download/762755/intel-6th-gen-processor-graphics-windows.html
• Gen9.5: https://www.intel.com/content/www/us/en/download/776137/intel-7th-10th-gen-processor-graphics-windows.html
• For Linux: https://github.com/intel/compute-runtime
• ³ GPU is known to crash on pretty much all non-vanilla worldgen. Your millage may vary.
• ⁴ GPU is known to crash with some complex worldgen datapacks, such as Terralith. Your millage may vary.
• ⁵ Gen9 and Gen9.5 are integrated graphics on 6th-9th gen core processors, and 10th gen non-G series core processors
• ⁶ Gen11 and Gen12, Gen12.5 here are integrated graphics in 10th G-series core processors, 11th-14th gen core processors, plus Arc DG1, Arc A-series
• ⁷ Gen12.7 refers to Meteor Lake and Arrow Lake integrated graphics.
• At this point it is integrated graphics in Core Ultra 100 series and above, plus Battlemage dedicated graphic and above.
• ⁸ The official driver package on Windows. The ROCm runtime on Linux.
• ⁹ Driver versions 26.5.1 is known to always crash. Existing installations upgraded to 26.6.1+ may also crash as well.
• If you are experiencing crashes on 26.6.1+, it is recommended to DDU then do a fresh installation.
• ¹⁰ The official driver package on Windows. The AMDGPU-Pro runtime on Linux.
• ¹¹ Mesa 26.1.x branch is known to work on RDNA3/4. Anything can happen with any hardware combination, including corrupted worldgen. Your millage may vary.
• ¹² Missing FP64 support
• ¹³ Driver crashes
• ¹⁴ Integrated graphics for Ryzen 7000 series and 9000 series not included. They are too slow for this task.

(#thanks ishland)

Tested Hardware

Simplified:

• OS: CachyOS
• Motherboard: B550M Phantom Gaming 4
• CPU: AMD Ryzen 5 5500
• GPU: GTX 1060 6GB
• Allocated RAM: 6GiB
• Disk: SSD
• Launcher: PrismLauncher
• Java: Azul Zulu JRE 25

Advanced:

• OS: CachyOS x86_64
• Motherboard: B550M Phantom Gaming 4
• Kernel: linux-cachyos-bore-lto
• Sched-ext Scheduler: Lavd (Gaming mode)
• Display: 2560x1440, 120 Hz
• DE: KDE Plasma
• WM: KWin (X11)
• CPU: AMD Ryzen 5 5500 (12) @ 4.46 GHz
• PBO: +200MHz
• Core Undervolt: -6mV
• GPU: NVIDIA GeForce GTX 1060 6GB
• GPU Driver: nvidia-580xx-dkms nvidia-580xx-settings nvidia-580xx-utils opencl-nvidia-580xx
• Memory: 31.21 GiB
• Swap: 33.21 GiB
• Minimum Allocated RAM: 1GiB
• Maximum Allocated RAM: 6GiB
• Disk (/): 110.00 GiB - btrfs
• Compression: ZSTD level 3
• Launcher: PrismLauncher
• Java: azul_zulu_jre25.0.3

Mod parameter

Some mod config has been modified, so here i'm gonna say what has been changed and why it has been changed (globally).

Async

• enableAsyncSpawn set from false to true

Why? For less laggy entity spawning

Async Particle

• "gpuAcceleration" set from true false
• "appendNewParticlesToRenderer" set from true false

Why? To fix a bug between Vulkan and Async Particle which cause huge lag with a high number of particle

Beryl

• "shadersOn" set from true to false

Why? Not forcing shader for everyone

C2ME

• threadPoolPriority set from "default" (4) to 3
• maxConcurrentChunkLoads set from "default" (24) to 8
• chunkSendingSpeedMultiplierPercentage set from "default" (200) to 0
• gcFreeChunkSerializer set from "default" (false) to true

[openclAccel]

• allowIncompatibilityFallback set from "default" (false) to true

Why? Faster yet less laggy chunk creation/loading, also an activated Fallback

Fast Noise

• tree set from false to true

Why? avoid multiple calls to the thread when generating

Ixeris

• aggressiveCaching set from false to true
• keyboard set from false to true

Why? improve the event polling performance

Modernica

• perfChunkMeshing set from true to false
• perfDeduplicateClimateParameters set from false to true
• perfDeduplicateLocation set from false to true
• perfNetworkEnhancements set from true to false
• perfNetworkOptimizations set from true to false
• perfRemoveBiomeTemperatureCache set from true to false
• perfResourcepacks set from true to false
• perfWorldgenAllocation set from true to false

Why? For mod/datapack compatibility and less resource utilization

ServerCore

features:

• prevent-moving-into-unloaded-chunks set from false to true
• xp-merge-radius set from 0.5 to 1
• item-merge-radius set from 0.5 to 1

lobotomize-villagers:

• enabled set from false to true

Optimizations.yml

• fast-biome-lookups: true

Why? For reducing the time to calculate the Tick

Structure Layout Optimizer

• "deduplicateShuffledTemplatePoolElementList" set from false to true

Why? make structure layouts generate slightly faster

StateStream

• update_culling_enabled set from true to false

Why? Because the json file doesn't work (or I'm dumb, the two is possible)

TwinSession

• autoOp set from true to false
• spawnNearPlayer set from true to false

Why? If you already played with friends you know, you know…

Modified Mod

For the Vulkan and Sodium version of the Modpack, I had to modify StateStream for it to work in SinglePlayer too, here is the modification made:

• Suppressed quilt.mod.json (idk why)
• Modified the file fabric.mod.json at "environment": from "server" to "*"

GPU Workloads and P-State (NVIDIA and Vulkan Version Only)

This part concern more the NVIDIA GPU side.

Normally in Minecraft, the GPU automatically switch from P8-P5 to the P0 (Maximum Performance), but on the Vulkan Version, instead of switching to the P0 as it should, it switch to the P2 (Workload mode).

This is due to the OpenCL implementation that the NVIDIA Driver detect and automatically switch to the P2 as intended.

This is normally not affecting the performance by a ton (you wont see any difference for Minecraft), but the VRAM clock is gonna be lower than in P0.

Mod List

• Almanac by frikinjay
• Alternate Current by Space Walker
• Async by AxalotL, Alchemy, Bliss, FurryMileon, Grider, jediminer543
• Async Advancement Toast by Author87668
• Async Logger by decce
• AsyncParticles by Harvey_Husky
• AsyncScreenshot by Author87668
• AudioThrottle by Noslow
• Better Biome Blend by FionaTheMortal
• BetterRenderDistance by Warma
• BugFixerUpper by 2No2Name
• Chunky by pop4959
• Cloth Config v26.1 by shedaniel
• Command Optimiser by Barnaby
• Concurrent Chunk Management Engine by RelativityMC, ishland
• Concurrent Chunk Management Engine (Optimizations/Acceleration/OpenCL) by RelativityMC, ishland
• Configured Defaults by Fuzs
• CursorCentered Fix by LitnhJacuzzi
• Debugify by isXander
• Disconnect Packet Fix by
• e4all by JustPixel
• Enttick by cintlex
• Fabric API by FabricMC
• Fabric Language Kotlin by FabricMC
• Farla's Hotbar Optimizer by Farla
• Fast Noise by ZenXArch
• FastMapCodec by neko
• FastServerPings by vansen
• FerriteCore by malte0811
• Fishing rod fix by andrewchik
• Fzzy Config by fzzyhmstrs
• Gnetum by decce
• ImmediatelyFast by RK_01
• Immersive Optimization by Luke100000
• IncrementalPlayerSave by ExtraJuiceMan
• Iodium by BlackGiack
• Iris by coderbot, IMS212, Justsnoopy30, FoundationGames
• Ixeris by decce
• Jasione by decce
• Ksyxis by VidTu
• LetMeDespawn by frikinjay
• Lite FPS by Patrolin
• Lithium by JellySquid, 2No2Name
• Marlow's Crystal Optimizer by Bram, Marlow
• MaxHealthFix by Darkhax
• Mod Menu by Prospector, haykam821, gniftygnome, TerraformersMC
• Modernica by omo50, embeddedt, jellysquid3
• More Culling by FX - PR0CESS, 1Foxy2
• Multicore Magic by the-real-ltcg
• Not Enough Vulkan by FlashyReese, amiralimollaei
• Optimized block entities by maDU59_
• Oxidizium Panama by QPCrummer
• Placeholder API by Patbox
• PrickleMC by Darkhax
• Put A Plug In it! by Dipilodopilasaurus
• RailOptimization by Andrew Elizabeth / EasterGhost
• Resourcefulconfig by ThatGravyBoat
• ScalableLux by Spottedleaf, ishland
• ServerAddressSpaceFix by TheWhiteDog9487
• ServerCore by Wesley1808
• Sharpness Tooltip Fix by SharpnessTooltipFix contributors
• SignFaster by LoLip_p
• Sodium by JellySquid (jellysquid3)
• Sodium Extra by FlashyReese
• Sodium Relief by Erotoro
• StateStream by SQRT256_
• Structure Layout Optimizer by TelepathicGrunt
• TNT Optimiser by jayjoke
• TT20 by JX_Snack, Lemonnik
• Thiepine by Apladokimes
• Title Fixer by TheGameratorT
• TwinSession by (The)MisterFish
• Very Many Players by ishland
• Volume Fix by Roundaround
• VulkanMod by Collateral
• YetAnotherConfigLib by isXander