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IronFurnacesFix

Mod

by Gonduzhang

Fixes Iron Furnaces lag and memory issues caused by BiggerStacks (MC 1.20.1, Forge 47.4.x)

Type

Mod

CurseForge Downloads

322

CurseForge ID

1637411

Last Updated

Aug 19, 2026

Description

IronFurnacesFix

Fixes the lag and memory issues that appear when running BiggerStacks together with Iron Furnaces (更多熔炉).

What it fixes

  • Memory / inventory blow-up: when BiggerStacks raises the stack limit (e.g. to 100k), Iron Furnaces was rebuilding its inventory with 100000+ slots on load, which blew up memory and made every save/sync slow. This fix restores the original slot count.
  • Tick lag while smelting: the mult-smelting methods ran a per-item setRecipeUsed loop up to 100000 times every tick, which froze the game. The fix removes the loop (the result is identical) and derives the smelting cap from getMaxStackSize().

Your large stack sizes keep working — furnaces just stop lagging.

Compatibility

Component Version Minecraft 1.20.1 Forge 47.4.x Iron Furnaces 4.1.8 (required) BiggerStacks any (not required at build time)

License

GNU GPL v3. Based on Iron Furnaces by mollgan.

Recommended Gear

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Included in Modpacks (1)

External Resources