FPS Reducer

Evidence

Ran on Kiln's test stand (2026-11-04): FpsReducer did not start: java.lang.NoSuchFieldError: Class net.minecraft.client.Minecraft does not have member field 'net.minecraft.client.Options options'.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.blaze3d.platform.FramerateLimitTracker
• com.mojang.blaze3d.platform.Window
• net.fabricmc.fabric.api.client.screen.v1.ScreenEvents
• net.fabricmc.fabric.api.client.screen.v1.ScreenEvents.BeforeInit
• net.fabricmc.fabric.api.client.screen.v1.ScreenKeyboardEvents
• net.fabricmc.fabric.api.client.screen.v1.ScreenKeyboardEvents.BeforeKeyPress
• net.fabricmc.fabric.api.client.screen.v1.ScreenMouseEvents
• net.fabricmc.fabric.api.client.screen.v1.ScreenMouseEvents.BeforeMouseClick
• net.fabricmc.fabric.api.client.screen.v1.ScreenMouseEvents.BeforeMouseScroll
• net.minecraft.client.InactivityFpsLimit
• net.minecraft.client.OptionInstance
• net.minecraft.client.Options
• net.minecraft.client.gui.components.debug.DebugScreenEntryList
• net.minecraft.client.gui.screens.ChatScreen
• net.minecraft.client.gui.screens.PauseScreen
• net.minecraft.client.player.ClientInput
• net.minecraft.util.ARGB
• net.minecraft.world.entity.player.Input
• org.lwjgl.opengl.GL11
• Minecraft.debugEntries
• Minecraft.getFramerateLimitTracker()
• Minecraft.getWindow()
• Minecraft.options
• GuiGraphicsExtractor.horizontalLine()
• GuiGraphicsExtractor.pose()
• GuiGraphicsExtractor.verticalLine()
• LocalPlayer.getXRot()
• LocalPlayer.getYRot()
• LocalPlayer.input
• LocalPlayer.onGround()
• Component.nullToEmpty()

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3), Mixin (0.5)

In the author's words

Reduce GPU and CPU usage automatically when no user operation exists.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file FpsReducer2-fabric-26.3-2.18.jar. The scan reads the mod's classes; it does not run them.