Fix Forge overriding ResourceKey.equals() with a slower implementation

Author: embeddedt

forge/src/main/java/org/embeddedt/modernfix/forge/mixin/perf/resource_key_equality/ResourceKeyMixin.java

@@ -0,0 +1,18 @@
+package org.embeddedt.modernfix.forge.mixin.perf.resource_key_equality;
+
+import net.minecraft.resources.ResourceKey;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+
+@Mixin(ResourceKey.class)
+public class ResourceKeyMixin {
+    /**
+     * @author embeddedt
+     * @reason ResourceKeys are interned, so there is no reason to waste time doing any deeper comparison. This override
+     * is patched in by Forge, it doesn't exist in vanilla
+     */
+    @Overwrite(remap = false)
+    public boolean equals(Object o) {
+        return o == this;
+    }
+}