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Put A Plug In it! (PAPI)

A small mod that fixes Memory Leak issues, optimizes Memory Usage, and increases version/loader support for features of other Memory Leak Fix/Memory Optimization mods
by Dipilodopilasaur
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600,169 downloads
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Updated Jul 6, 2026
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Bug Fixes Performance Server Utility

Put A Plug In it! (PAPI) initially solved a Memory Leak I found with Sophisitacted Core while playing the "NightfallCraft - The Casket of Reveries" Modpack by P1nero

Sophisticated Core natively fixed the Memory Leak in their 1.20.1+ Forge & NeoForge versions, but the pre-1.20.1 and Fabric versions of the mod still have the glitch, which PAPI can be used to fix.

PAPI now also aims to find and solve as many Memory Leaks as possible, and integrate features and compatability for and from other mods, to make an all-in-one Memory Leak Fix and Memory Optimization mod, and to increase version and loader support for features of other Memory Leak Fix and Memory Optimization Mods.

Icon and Name by lyftos, inspired by Plug & Play by Morio von Rickenbach, and Michael Frei (Playables)

 

Core Features

Features Derrived or Adapted From Other Mods

FX (FX_PR0CESS)'s Memory Leak Fix (MemoryLeakFix)

  • Biome Temperature cache sharing
  • Entity brain-memory cleanup trio
  • TagKey weak intern pool
  • Drowned navigation cleanup
  • Crosshair target / hit result reset
  • Huge screenshot buffer free-on-failure

I intend to add more Memory Leak fixes in the future so if you know of any mods or modpacks that you suspect of having Memory Leak issues, let me know in the comments!

papi-1.21.1-neoforge-1.1.3.jar
MC 1.21, Client, 1.21.1, NeoForge, Server
Release 2026-05-08 Get
papi-1.20.1-fabric-1.1.1.jar
MC Client, Fabric, 1.20.1, Server
Release 2026-03-08 Get
papi-1.20.1-forge-1.1.1.jar
MC Client, 1.20.2, 1.20.5, 1.20.1, Forge, 1.20.6, 1.20.4, 1.20.3, Server
Release 2026-03-08 Get

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