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

233,245

CurseForge ID

1368326

Modrinth Downloads

625,927

Modrinth ID

YS3ZignI

Last Updated

Nov 6, 2026

Description

TT20

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

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	❌	⏳	❌