TT20 (TPS Fixer)
Modby AVALTInteractive
TT20 helps reduce lag by optimizing how ticks work when the server's TPS is low.
Type
Mod
CurseForge Downloads
88,550
CurseForge ID
1368326
Modrinth Downloads
462,225
Modrinth ID
YS3ZignI
Last Updated
Jul 27, 2026
Description
# 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
Game Versions
Screenshots
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