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TT20 (TPS Fixer) logo

TT20 (TPS Fixer)

Mod

by AVALTInteractive

TT20 helps reduce lag by optimizing how ticks work when the server's TPS is low.

Type

Mod

CurseForge Downloads

233,810

CurseForge ID

1368326

Modrinth Downloads

627,033

Modrinth ID

YS3ZignI

Last Updated

Nov 7, 2026

Description

TT20

TT20 helps reduce lag by optimizing how ticks work when the server's TPS is low.

fabric-api discord-plural

Regarding singleplayer

Singleplayer should work fine! You can use the mod on the client without problems.

🤔 What does TT20 stand for?

TT20 is an abbreviation of the ticks*tps/20 formula. It's used to calculate the amount of ticks something takes, while taking the TPS into account.

⚠️ Caveats

TT20 only fixes the symptoms of TPS lag, not the actual lag. It re-calculates the amount of ticks things take. For example, when you're breaking a block it takes the original break time, multiplies it by ticks and divides it by 20 (the maximum TPS). This ensures that the end user feels almost no lag, even if the TPS is very low.

⚙️ Roadmap

Finished

  • Block break delay
  • Eating delay
  • Item pickup delay
  • Block entity tick acceleration (experimental, off by default)
  • Portal delay
  • Sleeping delay
  • Potion delay
  • Fluid spread speed
  • Random tickspeed acceleration
  • Day/nighttime acceleration
  • Bow/crossbow acceleration
  • TNT acceleration (off by default)
  • Disabled vanilla lagback

If you believe there is features missing, please tell us by creating a new issue
(yes, also if you want compatibility with other mods!)

Supported versions

TT20 Fabric/Quilt Forge NeoForge
26.X ✅ ❌ ✅
1.21.11 ✅ ❌ ✅
1.21.9/10 ✅ ❌ ✅
1.21.2-8 ✅ ❌ ✅
1.21(.1) ✅ ❌ ✅
1.20.5/6 ✅ ❌ ✅
1.20.2-4 ✅ ❌ ✅
1.20(.1) ✅ ✅ ❌
1.19.2 ✅ ✅ ❌
1.18.2 ❌ ✅ ❌
1.16.5 ❌ ⏳ ❌
1.12.2 ❌ ✅ ❌
1.8.9 ❌ ⏳ ❌
1.7.10 ❌ ⏳ ❌
1.6.4 ❌ ⏳ ❌

✅ - Supported ⏳ - Planned/WIP ❌ - Unsupported

Compatibility

Mod Loaders

Fabric Forge Neoforge Quilt

Game Versions

1.12.2 1.18.2 1.19.2 1.20 1.20.1 1.20.2 1.20.3 1.20.4 1.20.5 1.20.6 +16 more

Recommended Gear

Affiliate

Hardware and extras that pair well with this mod.

Mini PC for self-hosting

Mini PC for Self-Hosting

A low-power box that can sit in a cupboard and run a modded server around the clock.

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Screenshots

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External Resources

CurseForge Modrinth Source Code Wiki Issues