sloptimizer
by slonkazoid
Sloptimizer shortens the loading time of Minecraft on Fabric by optimizing how resources are reloaded at startup.
What it does
Sloptimizer targets the startup phase and the resource reload that happens when the game loads. It also addresses a long pause that some players see near the 100% loading screen. The mod is a learning project by its author, built on JNI and FFM, and it is only useful when a setup relies on large textures, so it may add little for most installs. Files are for Fabric and 1.21.11, and the mod needs Java 25.
Key features
Faster startup reload
Speeds up the resource reload step performed when Minecraft starts, with the filter rewriting solidifying textures.
Loading screen pause fix
Addresses a stall near the 100% loading screen that some players notice during startup.
Texture solidifying
Solidifies default and cutout textures, including 512x resource packs, using RedHat OpenJDK 25.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Questions
Does Sloptimizer need Java 25?
Is Sloptimizer useful without large textures?
In the catalog
sloptimizer is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from slonkazoid
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What the author says
optimizes minecraft's startup time and resource reload time by rewriting the solidify filter (in rust:rocket:). fixes the long aah pause near 100% on the loading screen. requires java 25 disclaimer: you probably don't need this mod unless you're playing with 512x512+ textures or have a lot of content mods installed…
Official listing
- Modrinth page
- modrinth.com/mod/sloptimizer
- Owner
- slonkazoid
- Published
- 2026-03-11
- Updated on Modrinth
- 2026-03-13
- Facts verified
- 2026-10-15