FTB Quests Optimizer
by bigenergy
FTB Quests Optimizer reduces lag on servers that run quests, smoothing item withdrawal and quest turn-ins without changing quest rules.
What it does
Heavy inventory scans start only when they are actually needed. Related events are merged into one delayed check, which reduces load spikes, and changes such as charge or durability updates no longer trigger unnecessary checks. Resource turn-ins withdraw items in a single pass with one progress update, which avoids stutters during item moves and quest turn-ins.
The mod is intended for server owners. It is a server-required mod with an optional client side: players can join without it, though the client can add an icon cache that makes the quest book and tips smoother. Builds exist for 1.16.5, 1.18.2, 1.19.2, 1.20.1 and 1.21.1, for Fabric, Forge and NeoForge. The code is under the MIT License and is open source, with public links to the source and the issue tracker. The author also offers a second mod for further performance gains, which is not named here.
Key features
Smarter inventory detection
Heavy scans run only when a change truly calls for one, instead of on every tick.
Debounced checks
A burst of events is merged into one delayed check, which limits server load spikes.
NBT noise filtering
Changes like charge or durability do not trigger a check when the item and quantity stay the same.
Single-pass resource turn-in
Items are withdrawn in one pass with one progress update during quest turn-ins.
Client icon cache
An optional cache on the client keeps the quest book and tips smoother to browse.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Busy quest servers
Servers with many players turning in resources can reduce freezes during item moves.
Who it’s for: Server owners who run a quest system and want smoother quest handling. Players on those servers need no extra installation, though the client-side cache is available to them.
How it compares
Quests & Teams Fixes is open source under the MIT License and runs on client and server, with files for 1.20.1 on Fabric and Forge. FTB Quests Freeze Fix is client-side only, is not open source, and is published for 1.20.1 on Fabric and Forge under a custom license. FTB Quests Optimizer is server-required with an optional client, and targets 1.16.5 – 1.21.1 on Fabric, Forge and NeoForge.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| FTB Quests Optimizer | Fabric, Forge and NeoForge | 1.16.5 – 1.21.1 | Server required, client optional | 2026-04-14 |
| Quests & Teams Fixes | Fabric and Forge | 1.20.1 | Client and server | 2026-09-09 |
| FTB Quests Freeze Fix | Fabric and Forge | 1.20.1 | Client-side only | 2024-10-02 |
Questions
Which loaders does FTB Quests Optimizer support?
Does the mod change quest rules?
In the catalog
FTB Quests Optimizer is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from bigenergy
Similar mods
What the author says
A lightweight mod-optimizer for FTB Quests. Removes micro-freezes when moving items and turning in quests, makes inventory checking smarter and quieter for the server - without changing the gameplay and quest rules. Smart inventory detection - heavy scans are launched only when really needed.
Official listing
- Modrinth page
- modrinth.com/mod/ftb-quests-optimizer
- Owner
- bigenergy
- Published
- 2023-09-15
- Updated on Modrinth
- 2026-04-14
- Facts verified
- 2026-10-15