Tpsum
by Sixik
Tpsum targets hot paths on the server that run constantly during normal play, including mob spawning, biome lookup, worldgen and the task loop.
What it does
Tpsum is aimed at Minecraft Forge and NeoForge servers. Its changes sit in code paths that execute very often during gameplay, such as the server tick, mob spawn checks and biome queries, where the aim is to cut CPU time and avoidable allocations that add garbage collection pressure.
The mod is installed on the server alone, so players join without installing anything on their side. Its files target 1.20.1 and 1.21.1, and the latest build for both Forge and NeoForge is 0.0.10 for 1.20.1, published on 2026-01-18. The code is released under the MIT License and is open source, with the source code and issue tracker publicly linked. The first release was published on 2025-12-23, and the last update on 2026-01-18.
Key features
Faster mob spawning
Mob spawning checks run with fewer expensive calls, lowering the cost of the spawn hot path on busy servers.
Cached biome lookup
Biome lookups use a cached noise-biome source and small math improvements, so repeated queries cost less.
Fewer worldgen allocations
Feature placement uses pooled contexts, which lowers the garbage collection load while chunks generate.
Optimized task queueing
The BlockableEventLoop queueing and counting were reworked to sustain a high task throughput.
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 owners on Forge or NeoForge who want lower CPU cost on spawning, biome lookup and worldgen without changing gameplay content.
Questions
Does Tpsum have to be installed on the client?
Which loaders does Tpsum support?
Does Tpsum add new blocks or items?
In the catalog
Tpsum is one of 3,545 Optimization mods on ModsFinder, and one of 1,441 Optimization mods for Forge. 32,366 mods support Minecraft 1.21.1.
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What the author says
Tpsum is a small, performance-focused optimization mod for Minecraft (Forge/NeoForge). It targets hot paths that are executed extremely often during normal gameplay (server tick, mob spawning, biome lookup, and worldgen), aiming to reduce CPU time and avoidable allocations/GC pressure. ⚠️ No new content - Tpsum only…
Official listing
- Modrinth page
- modrinth.com/mod/tpsum
- Owner
- Sixik
- Published
- 2025-12-23
- Updated on Modrinth
- 2026-01-18
- Facts verified
- 2026-10-15