MicroTimingReplay
by ryan100c
MicroTimingReplay records sub-tick events on a Fabric server over a set period, so a recorded span can be replayed step by step later.
What it does
The mod captures micro-timing events while the server runs: block updates, scheduled ticks, piston movements and entity movement or spawning. A recording is kept as a profile, and the profile holds the tick frames and the world they belong to. Replay can go forward, backward or jump to a chosen moment, and at any point a player can inspect the Java call stack that produced an event.
Recording needs the game to be frozen first. The mod never freezes or unfreezes time itself, so the server operator runs the tick freeze before starting a recording, and stepping through a replay works correctly even without freezing. Recording stops automatically after 20 game ticks, or earlier with the stop command. Only the server needs the mod, so players join without installing it, and the mod is released under the MIT License as open source.
Key features
Sub-tick event recording
Events are sliced into frames per game tick, and each frame keeps its event tree for inspection.
Areas for spatial filtering
An area is an axis-aligned bounding box tied to a dimension. Only events inside it are recorded, which keeps the data volume small.
Backups and restore
Non-player entities inside a recorded area are backed up and later restored, with the area cleared and rebuilt first.
Profiles for recording sessions
A profile holds one recording session, can span several areas and dimensions, and takes its own name.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server operators and developers who need to study the exact order of game events over a short window of time. Players who only join a server have nothing to install.
How it compares
SoundLog is open source under the CC0 1.0 Universal license and runs client-side only on Fabric for 26.2, so it records audio rather than server events. FlashbackClipper is client-side only on Fabric for 1.21.11 – 26.2 and is not open source, being released under All rights reserved. areaKeepInventory is server-side only and open source under the Apache License 2.0 on Fabric for 1.21.11 – 26.1.2, covering the same version as this mod.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| MicroTimingReplay | Fabric | 26.1.2 | Server required, client optional | 2026-08-07 |
| SoundLog | Fabric | 26.2 | Client-side only | 2026-08-21 |
| FlashbackClipper | Fabric | 1.21.11 – 26.2 | Client-side only | 2026-09-06 |
| areaKeepInventory | Fabric | 1.21.11 – 26.1.2 | Server-side only | 2026-03-31 |
Questions
Does MicroTimingReplay need to be installed on both sides?
Does the server have to freeze time for recording?
Which game version does the mod support?
In the catalog
MicroTimingReplay is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 15,189 mods support Minecraft 26.1.2.
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What the author says
A Fabric mod for recording micro-timing events on the server over a period of time (block updates, shape updates, scheduled ticks, block events, piston movements, entity movement/spawning, etc.) and later step-by-step replaying them — you can go forward, backward, jump to any step, and inspect the Java call stack at…
Official listing
- Modrinth page
- modrinth.com/mod/microtimingreplay
- Owner
- ryan100c
- Published
- 2026-08-07
- Updated on Modrinth
- 2026-08-07
- Facts verified
- 2026-10-15